2005年全国高考英语试题及答案(word)(广东)
绝密*启用前2005年普通高等学校招生全国统一考试(广东卷) 试卷类型：A英语本试卷分选择题和非选择题两部分，共12页，满分150分。
考试用时120分钟。
注意事项：1．答卷前，考生务必用黑色字迹的钢笔或签字笔将自己的姓名和考生号填写在答题卡上。
用2B铅笔将答题卡试卷类型(A)填涂在答题卡上，并在答题卡右上角的“试室号”和“座位号”栏填写试室号、座位号，将相应的试室号、座位号信息点涂黑。
2．选择题每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦干净后，再选涂其他答案，答案不能答在试卷上。
3．非选择题必须用黑色字迹钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案；不准使用铅笔和涂改液。
不按以上要求作答的答案无效。
4．考生必须保持答题卡的整洁，考试结束后，将试卷和答题卡一并交回。
I. 听力(共两节，满分30分)做题时，先将答案划在试卷上。
录音结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。
第一节：听独白或对话(共15小题；每小题1．5分，满分22．5分)听下面5段对话或独白。
每段对话或独白后有几个小题，从题中所给的A、B、C 三个选项中选出最佳选项，并标在试卷的相应位置。
听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
听第l段对话，回答第1—3题。
1. What's the possible relationship between the speakers?A. Classmates.B. Mother and son.C. Teacher and student.2. Why does the woman try to persuade the man to prepare for the exam?A. Because Professor Johnson will get angry otherwise.B. Because everyone should pass the exam.C. Because the test will be difficult.3. What does the man finally decide to do?A. To study for the test.B. To watch the football game.C. To eat something before watching the game.听第2段对话，回答第4—6题4. Where does the conversation most probably take place?A. At a railway station.B. At an airport.C. In a hotel.5. Why can't the man himself help carry the luggage?A. Because he has to report to the manager first.B. Because he's on the phone at the moment.C. Because he cannot leave the desk.6. What will the man probably do?A. He will do nothing for the woman.B. He will find a way to help her.C. He himself will send her to the station.听第3段独白，回答第7—9题7. What places did the speaker take his friend to visit?A. The opera house, some museums and the library.B. The zoo, the opera house and some museums.C. The zoo, the City Hall and the opera house.8. How did the speaker feel after showing his friend around?A. Happy.B. Bored.C. Tired.9. What did the speaker regret?A. Spending too much time visiting.B. Visiting the places at different times.C. Not having planned their visit well.听第4段对话，回答第10—12题10. What time was it when the man saw the robbery (抢劫) ?A. 7:30 p.m.B. 6:25 p.m.C. 5:35 p.m.11. Who organized the robbery?A. A serviceman in the pub.B. The driver in the car.C. A chemist.英语试题A第l页(共12页)12. How many people should be arrested according to the policewoman?A. 4.B. 3.C. 2.听第5段独白，回答第13—15题13. What does the man enjoy in his job?A. Learning the history of the city.B. Knowing different people.C. Speaking foreign languages.14. Where do most of the tourists come from?A. South Africa.B. South America.C. North America.15. Which of the following languages can the man speak?A. German.B. Italian.C. Russian.第二节：听取信息(共5小题；每小题1．5分，满分7．5分)听下面1段独白。
请根据题目要求，从所给的内容中获取必要的信息，填入答题卡标号为16—20的空格中。
录音读两遍。
你有90秒钟的作答时间。
Time Program Content3 :00 p. m. Open University Course 16 ___________4:30 p.m. Afternoon Cinema 17___________ by Charlie Chaplin18___________ Spot the Mistake Competing with experts7 :00 p. m. The World Around Us Sonoran Desert19___________ Sports Yesterday's FA Cup Final10:00 p.m. News News10:15 p.m. 20___________ Artists of AmericaⅡ. 完形填空(共20小题；每小题1．5分，满分30分)阅读下面短文，掌握其大意，然后从36～55各题所给的四个选项(A、B、C和D) 中，选出最佳选项，并在答题卡上将该项涂黑。
Some myths are stories told since ancient times to explain the causes for natural happenings.The Greek myth that explains why there are changes of (36) _______ is about Demeter, the goddess of the harvest. She had a daughter, Persephone, whom she loved very much. Hades, godof the underworld, fell in love with Persephone, and he asked Zeus, the ( 37) _______ of the gods, to give Persephone to him as his (38) _______. Zeus did not want either to disappoint Hades or to upset Demeter, so he said he would not agree to the marriage, but neither would he (39) _______ it. Hades, therefore, decided to take the girl without (40) _______. When Persephone was picking flowers in the garden, he seized her and took her to the underworld. When Demeter (41) _______ what happened to Persephone, she became so (42) _______ that she caused all plants to ( 43 ) _______. People were in (44) _________ of starving. But Demeter was determined not to let crops grow (45 ) _______ her daughter, Persephone, was returned to her. (46) __________, still not wanting to disappoint Hades, decided upon a condition for Persephone's (47) ______ . She could go back to her mother if she had not (48) ________ anything while she was in the underworld. Demeter(49) ________ it because she did not know that Persephone had eaten several pomegranate (石榴) seeds in the underworld. When Zeus (50) ______ this, he agreed that Persephone could spend part of the year with her (51) _______, but he added that since she had eaten the seeds, she must spend part of the year in the underworld. And so it (52) ________ that when Persephone is in the underworld, Demeter is sad and therefore (53) _______ not let the crops grow. That is (54) ______ we have winter when plants do not grow. When Persephone returns, Demeter is (55)______ , it is spring, and plants begin to grow again.36. A. periods B. seasons C. time D. age37. A. winner B. ruler C. advisor D. fighter38. A. wife B. lover C. partner D. daughter39. A. forbid B. forgive C. admit D. accept40. A. arrangement B. warning C. reason D. permission41. A. let out B. worked out C. thought out D. found out42. A. excited B. tired C. angry D. serious43. A. grow fast B. start growing C. stop growing D. grow slowly44. A. danger B. hope C. turn D. case45. A. since B. until C. after D. when46. A. Persephone B. Zeus C. Demeter D. Hades47. A. return B. change C. marriage D. journey48. A. stolen B. found C. eaten D. heard49. A. understood B. refused C. doubted D. accepted50. A. discovered B. studied C. forgot D. prepared51. A. daughter B. mother C. god D. ruler52. A. works B. remains C. happens D. starts53. A. should B. can C. dare D. will54. A. where B. because C. why D. how55. A. nice B. friendly C. fresh D. happyⅣ．阅读理解(共20小题；每小题2分，满分40分阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。
2005年普通高等学校招生全国统一考试(广东卷)英语试题答案
东山教育中小学课外辅导第 1 页 共 1 页2005年普通高等学校招生全国统一考试(广东卷)英语试题参考答案1—5ACACC 6—10BBACC 11—15AABBBle="mso-16. Chemistry (C 没大写扣0. 5分)17. film /move (写成复数扣0. 5分)18. 6:15p. m. (没写p. m. 或in the afternoon 的扣0. 5分)19. 8:50p. m. (没写p. m. 或in the afternoon 的扣0. 5分)20.The Art Show (首字母没大写扣0. 5分，没写定冠词扣0. 5分)21—25DDAAC 26—30CBBDB 31—35ACDBA36—40BBAAD 41—45DCCAB 46—50BACDA 51—55BCDCD56—60ADCDD 61—65CBDBC 66—70CCAAA 71—75BABBD76. go —went 77. had —have78. while —unless 79. eat —eating80. They —This /That /It 81. 正确82. 在month 后加where/when 83. give —do84. too —either 85. 去掉more ，或改为much参考范文一Once up a time there was a farmer who worked hard in the fields every day. One day, while he was ploughing the fields, he heard a bumping sound. He saw a rabbit lying by the trump. He picked it up and found that it was a fat rabbit. He thought to himself, “Since it is so easy to get a rabbit like that, why should I work so hard all day long?” He threw his hoe away and lay by the tree every day, dreaming for more rabbits to come. When he finally realized his foolishness and returned to his fields, he found that all his crops were dead. This story tells us that we should not wait for unexpected gains by trusting to chance and luck. Or, we should not hope to get rewards without hard work.参考范文二There was once a farmer who worked very hard. One day when he was hoeing in the sunshine, he suddenly heard a low sound “Peng!”. He turned and hurried to the tree. He found a rabbit dying. He took hold of the rabbit and was very excited. “Why can ’t I wait for more rabbits here? It ’s cool under the tree. ” So he dropped off his hoe and waited there. But day after day, there were no more rabbits coming. What ’s worse, all his crops were dead. The story tells us that if you want to get something, you must work hard for it. Remember, “No pains, no gains!”。
2005年广东省高考英语试卷分析
2005年⼴东省⾼考英语试卷分析2005年⼴东省⾼考英语试卷分析深圳市宝安区教科培中⼼教研室---刘秋云2005年是⼴东省⾼考英语单独命题的第⼆年，是在全⾯推进素质教育和贯彻教育部⾼考改⾰精神的⼤背景下进⾏的，⼴东⾼考英语试卷是以全国英语考试⼤纲及考试说明为依据，以⼴东考试中⼼⾼考补充说明⽽命制的，它坚持了“突出语篇、强调应⽤、注重实际”的试题设计原则，体现了“稳定中求发展”的指导思想，对⾼中英语教学起着科学、正确的导向作⽤。
总的来说，今年试题体现了“着眼于新的《课程标准》的思想，如除掌握全国考试⼤纲2000左右词汇，还另增加231个新词汇，在题量、词汇和阅读策略等⽅⾯向《新课程标准》靠拢，进⾏平稳过渡，贯彻了“以考查学⽣素质及英语语⾔技能”的⾼考命题指导思想，在考查学⽣基础知识的同时，主要偏重对学⽣语⾔运⽤的理解能⼒的考查。
与去年相⽐试卷总难度变化不⼤，体现了⼴东省考试中⼼提出的稳中求进，稳中求改的精神，除了第⼀⼤题听⼒5⼩题改为信息填词外，各题型保持不变，除单选与完形填空与去年持平以外，其它各题都⽐去年容易，总体难度与去年持平，试卷以中等题为主，符合考纲明确规定的试卷包括容易题、中等题和难题，其中以中档题为主的原则，往年⾼考从没提过。
这⼀表述明确告知了考⽣不要⼀味钻难题，复习关键还是夯实基础，着眼易题和中档题，这对中学教学是个很好的导向。
⼀、试卷特点1、命题组认真总结了去年⾼考的命题经验，研究了“⼤纲”、“说明”和社会各界对2004年⼴东省⾼考英语试卷的反映及对试题命制的建议，本着“有利于考查学⽣素质，有利于⾼中英语教学”的原则进⾏命题；2、⽆论是完形填空、阅读还是短⽂改错，能够牢牢抓住语篇及应⽤这个中⼼；3、短⽂写作注重实际⽽不盲⽬追风，能够很好地检测学⽣驾驭语⾔的真实⽔平；4、试卷结构稳中有变，除把2004年第⼀节听⼒前5⼩题改为信息填词外，试卷结构与去年保持⼀致；5、单选注重语⾔运⽤能⼒，设题科学，题⼲不长，⼀⽬了然。
2005全国高考英语试题下载-广东卷[1]
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2005年普通高等学校招生全国统一考试(广东卷)英语本试卷分选择题和非选择题两部分，共12页，满分150分。
考试用时120分钟。
注意事项：1．答卷前，考生务必用黑色字迹的钢笔或签字笔将自己的姓名和考生号填写在答题卡上。
用2B铅笔将答题卡试卷类型(A)填涂在答题卡上，并在答题卡右上角的“试室号”和“座位号”栏填写试室号、座位号，将相应的试室号、座位号信息点涂黑。
2．选择题每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦干净后，再选涂其他答案，答案不能答在试卷上。
3．非选择题必须用黑色字迹钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案；不准使用铅笔和涂改液。
不按以上要求作答的答案无效。
4．考生必须保持答题卡的整洁，考试结束后，将试卷和答题卡一并交回。
I. 听力(共两节，满分30分)做题时，先将答案划在试卷上。
录音结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。
第一节：听独白或对话(共15小题；每小题1.5分，满分22.5分)听下面5段对话或独白。
每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。
听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
听第l段对话，回答第1—3题。
1. What's the possible relationship between the speakers?A. Classmates.B. Mother and son.C. Teacher and student.2. Why does the woman try to persuade the man to prepare for the exam?A. Because Professor Johnson will get angry otherwise.B. Because everyone should pass the exam.C. Because the test will be difficult.3. What does the man finally decide to do?A. To study for the test.B. To watch the football game.C. To eat something before watching the game.听第2段对话，回答第4—6题。
2005年高考英语试题与参考答案(湖南卷)
2005年高考英语试题与参考答案(湖南卷)第一部分听力(共三节，满分30分)做听力部分时，请先在试卷上作答．听力部分结束前，你将有两分钟的时间将第1至第17小题的答案转涂到答题卡上，将第18至第20小题的答案转写到答题卡上．第一节(共5小题，每小题1.5分，满分7.5分)听下面5段对话．每段对话后有一个小题，从题中所给的A、B、c三个选项中选出最佳选项，井标在试题巷的相应位置．听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍．例：How much is the shirt?A. ￡19.15.B. ￡9.15.C. ￡9.18.答案是B．1. What will the woman probably do tonight?A. See a film.B. Go to a concert.C. Do some shopping. [C]2. Where does the conversation take place?A. in an office.B. In a hotel.C. in a bedroom. [B]3. What time is it now?A. 2:30.B. 2:20.C. 2:10. [A]4. What did the man buy yesterday?A. Shirts.B. Shoes.C. Trousers. [B]5. What does the man suggest the woman do?A. Study al home.B. Go to school.C. Come back early. [C]第二节(共12小题；每小题1.5分，满分18分)听下面4段对话．每段对话后有几个小属，从题中所给的A、B、c三个选项中选出最佳选项，井标在试题卷的相应位置．听每段对话前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间．每段对话读两遍．听下面一段对话，回答第6和第7两个小题．6. What is the probable relationship between the two speakers?A. Clerk and gust.B. Nurse and patient.C. Manager and secretary. [A]7. What can we learn from this conversation?A. The man can't smoke in tile office.B. The man's living-room is full of smoke.C. The man can't get a non-smoking room. [C]听下面一段对话，回答第8至第10三个小题。
05广东听力材料
（广东）这是2005年普通高等学校招生全国统一考试，英语科听力部分。
该部分分为听、读白或对话、听取信息两节。
注意：回答听力部分时，请先将答案标在试卷上。
听力部分结束前，你将有2分钟的时间将试卷上的答案转涂到客观题答题卡上。
现在是听力试音时间。
Hello. International Friends Club, can I help you?Oh, hello. I read about your club in the paper today and I thought I‟d phone to find out a bit more.Yes, certainly. Well, we are a sort of social club for people from different countries. It‟s quite a new club; we have about fifty members at the moment, but we‟re growing all the time.That sounds interesting. I‟m British actually and I came to Washington about three months ago. I‟m looking for ways to meet people. Ummm...what kind of events do you organize?Well…we have social get togethers and sports events and we also have language evenings.Could you tell me something about the language evenings?Yes. Every day except Thursday we have a language evening. People can come and practice their languages, you know, over a drink or something. We have different languages on different evenings: Monday, Spanish; Tuesday, Italian; Wednesday, German; and Friday, French. On Thursday we usually have a meal in a restaurant for anyone who wants to come.Well, that sounds great! I really need to practice my French.OK. Well, if you can just give me your name and address, I‟ll send you the form and some more information. If you join now, you can have the first month free.试音到此结束，现在开始答题。
2005年高考英语试题·全国卷I（附答案）
全 国 卷(Ⅰ) (河北、河南、安徽、山西、海南等地区) 第一卷第一卷注意事项注意事项1. 答第一卷前，考生务必将自己的姓名、准考证号、考试科目用铅笔涂写在答题卡上。
答第一卷前，考生务必将自己的姓名、准考证号、考试科目用铅笔涂写在答题卡上。
2. 每小题选出答案后，用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动，用橡皮擦干净后，再选涂其它答案标号。
不能答在试卷上。
干净后，再选涂其它答案标号。
不能答在试卷上。
第一部分：听力(共两节，满分30(分) 做题时，先将答案标在试卷上。
先将答案标在试卷上。
录音内容结束后，录音内容结束后，录音内容结束后，你将有两分钟的时间将试卷上的答案转涂你将有两分钟的时间将试卷上的答案转涂到答题卡上。
到答题卡上。
第一节第一节 (共5小题；每小题1. 5分，满分7. 51. 5分) 听下面5段对话。
每段对话后有一个小题，从题中所给的A 、B 、C 三个选项中选出最佳选项，并标在试卷的相应位置。
听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
读下一小题。
每段对话仅读一遍。
例：How much is the shirt? A. £19. 15. B. £9. 15. C. £9. 18. 答案是B. 1. How much will the woman pay if she buys two skirts? A. $18. B. $19. C. $20. 2. What will the speakers discuss? A. A report. B. A computer. C. A report on computer. 3. What are the speakers talking about? A. A child. B. A room. C. A present. 4. What can we learn from this conversation? A. The woman does not get along well with the man. B. The woman does not get along well with her roommate. C. The man will talk with the woman’s roommate.5. Where are the two speakers now? A. On the first floor. B. On the fourth floor. C. On the fifth floor. 第二节 (共15小题；每题1. 5分，满分22. 5分) 第二节听下面5段对话。
2005年高考英语试题及答案(江苏卷)
2005年普通高等学校招生全国统一考试英语（江苏卷)第一卷(选择题共115分)第一部分:听力（共两节，满分30分）第一节（共5小题；每小题1。
5分，满分7。
5分）听下面5段对话。
每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标志在试卷的相庆位置。
听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题.每段对话仅读一遍。
例：How much is the shirt?A.￡19。
15B. ￡9.15 C。
￡9。
18l. How much will the man pay for the tickets?A. ￡7.5。
B. ￡15。
C。
￡50。
2。
Which is the right sate for the man’s flight？A。
Gate 16. B. Gate 22。
C。
Gate 25。
3. How does the man feel about going to school by bike？A. Happy。
B。
Tired. c. Worried。
4. When can the woman get the computers？A. On Tuesday.B. On Wednesday。
C. On Thursday.5. What does the woman think of the shirt for the party？A. The size is not large enough。
B。
The material is not good。
C。
The color is not suitable.第二节(共15小题；每小题1。
5分，满分22。
5分）听下面5段对话.每段对话后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听每段对话前，你将有时间阅读各个小题,每小题5秒钟；听完后,各小题将给出5秒钟的作答时间.每段对话读两遍。
广东高考英语历年真题分析(2005至2014年)
2005-2006年广东高考完形填空分析
3. 05-06年单项选择分析 〔1〕都是15小题； 〔2〕覆盖面广，如：时态，非谓语动词，情态动词，状语从句，固定搭配，交际用语，代词副词等； 〔3〕紧扣课本，生词不多见； 〔4〕难度适中。 总结：从07年开始，单项选择与完形填空题目都有了革命性变化。单项选择消失，与此同时完形填空选项减少，增添了语法填空的题型。更能表达学生运用语言知识的综合能力及对语境的整体把握。
13%
20%
20%
20%
20%
05-06年广东高考完形填空分析
1. 由于07年开始完形填空和单项选择改革，分为完形填空和语法填空两项，所以在此把05-06年的此题型分开来分析〔另有单项选择的简单介绍〕。 2. 05-06年完形填空分析
分析：整体来看，05-06年完形填空不算难，且字数稍多，学生题材也较为熟悉，对名词和动词的考察尤为重视。
2012年
第一问
What
What news
Where
第二问
How much
Where
How
第三问
What
How
What
第四问
Why
What
Who
第五问
Who
Why
What award
2013年
第一问
How long
How many
What
What
How long
What
第二问
What
What
What
领错宠物
流浪猫
单词数目
201
207
210
196
2012年
独白内容
考试遇堵车
少年名厨师
2005年高考英语试题·上海卷（附答案）
2005年高考英语试题·上海卷（附答案）2005年高考英语试题·上海卷（附答案）2005年普通高等学校招生全国统一考试英语招生试题上海卷本试卷分为第Ⅰ卷（第1—12页）第Ⅱ卷（第13页）两部分。
全卷共13页。
满分150分，考试时间120分钟。
第Ⅰ第卷（共105分）考生注意：1. 答第I卷前，考生务必在答题卡和答题纸上用钢笔或圆珠笔清楚填写姓名、准考证号、校验码，并用铅笔在答题卡上正确涂写准考证号和校验码。
卷前，考生务必在答题卡和答题纸上用钢笔或圆珠笔清楚填写姓名、准考证号、校验码，并用铅笔在答题卡上正确涂写准考证号和校验码。
2. 第I卷（1-16小题，28-84小题）由机器阅卷，答案必须全部涂写在答题卡上。
考生应将代表正确答案的小方格用铅笔涂黑。
注意试题题号和答题卡编号一一对应，不能错位。
答案需要更改时，必须将原选项用橡皮擦去，重新选择。
答案不能写在试卷上，写在试卷上一律不给分，第I卷中的第17-24小题和第17-24II卷的试题，其答案写在答题纸上，如写在试卷上则无效。
I. Listening ComprehensionPart A Short ConversationsDirections: In Part A, you will hear ten short conversations between two speakers. At the end of each conversations, a question will be asked about what said. The conversations and the questions will be spoken only once. After you hear a conversation and the question about is, read the four possible answers on your paper, and decide which one is the best answer to the question you have heard.1. A. A waiter B. A shop assistantC. A cashierD. A postman2. A. Weight lifting B. RunningC. Eating cucumbersD. Drinking diet coke3. A. Work with his friends B. Call on his friendsC. Go for a walkD. Make a phone call4. A. In a bookstore B. In a reading roomC. In a furniture storeD. In the man’s study5. A. 8 B. 12 C. 20 D. 326. A. Job hunting B. An online courseC. Earlier graduationD. Summer vacation plans7. A. Confused B. SympatheticC. EmbarrassedD. Uninterested8. A. The air is fresh. B. It’s hot inside.C. The window is open.D. It’s noisy ou tside.9. A. Phone later. B. Try harder.C. Wait for the signal.D. Check the number.10. A. He lost his way. B. He received a traffic ticket.C. He worked very carefully.D. He drove in heavy traffic.Part B PassagesDirections: In Part B, you will hear two short passages, and you will be asked three questions on each of the passages. The passages will be read twice, but the questions will be spoken only once. When you hear a question, read the four possible answers on your paper and decide which one would be the best answer to the question you have heard.Question 11 through 13 are based on the following passage.11. A. Open the cage window B. Put the cash in the drawer.C. Check the savings accountsD. Examine the audio system.12. A. Exciting B. DemandingC. BoringD. Relaxing13. A. It has flexible working hours.B. The speaker can have more leisure time.C. It requires more organization.D. The speaker can daydream while working.Question 14 through 16 are based on the following news.14. A. A natural disaster. B. A power failure.C. Homeless farmers.D. A serious accident.15. A. Jews and some Arabs. B. Arabs and North Africans.C. Jews and North AfricansD. North Americans and some Arabs.16. A. Exchange them for banks B. Save them for travelers.C. Collect them for poor children.D. Spend them on duty-free goods.Part C Longer ConversationsDirections: In Part C, you will hear two longer conversations. The conversations will be read twice. After you hear each conversation, you are required to fill in the numbered blanks with the information you have heard. Write your answers on your answer sheet.Blanks 17 through 20 are based on the following conversationRegent Conference CentreReservationsContact name: Joanne____17_______Purpose of reservation: A(n) ___18____ conferenceNumber of people:___45___maximumDate: 28th____19______Total to pay: ￡____20_____Complete the form. Write ONE WORD for each answer.Blanks 21 through 24 are based on the following conversation.What will the first robot do during the operation?__21__the materials.Who will be called in when a robot breaks down?A __22__How long will the robots work a day?__23__ a day.What will happen to the workers if robots are used?They will probably be __24__.Complete the form. Write NO MORE THAN THREE WORDS for each answer.！2009年6月英语四级作文范文(沪江新东方版)2009职称英语理工A类考试试题参考答案海天：2009年1月考研英语小作文范文【沪江网校】2010年12月四级答案完整版网络首发：2009年考研英语真题答案2009职称英语理工C类参考答案新东方：王江涛2009年考研英语作文真题及范文Ⅱ. Grammar and VocabularyDirections: Beneath each of the following sentences there are four choices maker A, B, C and D. Choose the one answer that best completes the sentence.25. John became a football coach in Sealion Middle School ______ the beginning of March.A. onB. forC. withD. at26. No progress was made in the trade talk as neither side would accept the conditions of_________.A. othersB. the otherC. eitherD. another27. There _________ be any difficulty about passing the road test since you have practiced a lot in the driving school.A. mustn’tB. shan’tC. shouldn’tD. needn’t28. A rough estimate, Nigeria is__________ Great Britain.A. three times the size asB. the size three times ofC. three times as the size ofD. three times the size of29. There was a loud scream from the backstage immediately after the concert ended, ______?A. wasn’t thereB. was thereC. didn’t itD. did it30. More than a dozen students in that school _______ around to study medicine last year.A. sentB. were sentC. had sentD. had been sent31. Professor Smith, along with his assistants, ______ on the project day and night to meet the deadline.A. workB. workingC. is workingD. are working32. He got well-prepared for the job interview, for he couldn’t risk _______ the good opportunity.A. to loseB. losingC. to be lostD. being lost33. ______ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.A. PutB. PuttingC. Having putD. Being put34. He transplanted the little tree to the garden _______ it was the best time for it.A. whereB. whenC. thatD. until35. It was unbelievable that the fans waited outside the gym for three hours just _______ a look at the sports stars.A. hadB. havingC. to haveD. have36. More and more people are signing up for Yoga classes nowadays, _______ advantage of the health and relaxation benefits.A. takingB. takenC. having takenbsp;&nD. having been taken37. At last, we found ourselves in a pleasant park with trees providing shade and _______ down to eat our picnic lunch.A. sittingB. having satC. to sitD. sat38. _________ in the regulations that you should not tell other people the password of your e-mail account.A. What is requiredB. What requiresC. It is requiredD. It requires39. Never before _______ in greater need of modern public transport than it is today.A. has this city beenB. this city has beenC. was this cityD. this city was40. If a shop has chairs________ women can park their men , women will spend more time in the shop.A. thatB. whichC. whenD. where41. There was such long queue for coffee at the interval that we ________ gave up.A. eventuallyB. unfortunatelyC. generouslyD. purposefully42. The company is starting a new advertising campaign to ________ new customers to its stores.A. joinB. attractC. stickD. transfer43. He proved himself a true gentleman and the beauty of his _______ was seen at its best when he worked with others.A. temperB. appearanceC. talentD.character44. At times, worrying is a normal, ________ response to a difficult event or situation—a loved one being injured in an accident, for example.A. effectiveB. individualC. inevitableD. unfavorableⅢ. ClozeDirections: For each blank in the following passages there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.(A)Are your table manners much better when you are eating at a friend’s home or in a restaurant than they are at your o wn home? Probably so, __45__ you are aware that people judge you by your table manners. You take special pains when you are eating __46__. Have you ever stopped to realize how much less self-conscious you would be on such occasions if __47__ table manners had become a habit for you? You can make them a habit by __48__ good table manners at home.Good manners at mealtimes help you and those around you to feel __49__. This is true at home as much as it is true in someone else’s home or in a restaurant. Good __50__ make meals more enjoyable for everyone at the table.By this timN:e you probably know quite well what good table manners are. You __51__ that keeping your arms on the table, talking with your__52__ full, and wolfing down your food are not considered good manners. You know also that if you are mannerly, you say “Please” and “Thank you” and ask for things to be passed to you.Have you ever thought of a pleasant attitude as being __53__ to good table manners? Not only are pleasant mealtimes enjoyable, but they aid digestion. The dinner table is a __54__ for enjoyable conversation. It should never become a battleground. You are definitely growing in social maturity (成熟) when you try to be an agreeable table companion.45. A. because B. but auseC. unless D. though46. A. in public B. at home C. at ease D. ina hurry47. A. such B. no C. some D. good48. A. acting B. enjoying C. practising D. watching49. A. comfortable B. stressed C. depressed D. outstanding50. A. dishes B. manners C. atmospheres D.friends51. A. mention B. prefer C. doubt D. realize52. A. stomach B. hands C. mouth D. bowl53. A. essential B. considerate C. obvious D. unusual54. A. time B. place C. chance D. way(B)There is a tendency to think of each of the arts as a separate area of activity. Many artists, __55__ would prove that there has always been a warm relationship between the various areas of human activity. __56__, in the late nineteenth century the connections between music and painting were particularly __57__. Artists were invited to design clothes and settings for operas and ballets, but sometimes it was the musicians who were inspired (给…以灵感) by the work of contemporary painters. Of the musical compositions that were considered as __58__ to the visual arts, perhaps the most famous is Mussorgsky’s Pictures at an Exhibition.Mussorgsky composed the piece in 1874 after the death, at the age of 39, of the artist Victor Hartmann. __59__ their friendship had not been a particularly long-lasting one,Mussorgsky was shocked by Hartmann’s __60__ death. The following year the critic, Vladimir Stasov, who decided to hold an exhibition of Hartmann’s work, suggested that Mussorgsky try to __61__ his grief by writing something in memory of Hartmann.The exhibition served as Mussorgsky’s inspiration. The ten pieces that make up Pictures at an Exhibition are intended as __62___ rather than representations of the paintings in the exhibition. Between each is a promenade (舞曲中的行进), __63___ the composer walks from one painting to another. The music is sometimes witty ant playful, sometimes almost alarming and frightening. Through a range of surprising __64__, Mussorgsky manages to convey the spirit of the artist and his work.55. A. therefore B. however C. moreover D. otherwise56. A. For example B. On the contrary C. In general D. On the other hand57. A. separate B. unknown C. close D. relevant58. A. links B. additions C. responses D. keys59. A. Before B. Though C. As D. If60. A. unavoidable B. undiscovered C. unnecessary D. unexpected61. A. control B. relieve C. conceal D. represent62. A. symbols B. imaginations C. contributions D. subjects63. A. but B. for C. once D. as64. A. paintings B. topics C. contrasts D. visionsⅣ. Reading ComprehensionDirections: Read the following passages. Each passage is followed by several questions or unfinished statement. For eapt; mso-char-indent-count: 2.0; mso-line-heighch of them there are four choices marked A, B, C and D. Choose the one that first best according to the information given in the passage you have just read.(A)You either have it, or you don’t—a sense of direction, that is. But why is it that some people could find their way across the Sahara without a map, while others can lose themselves in the next street?Scientists say we’re all born with a sense of direction, but it is not properly understood how it works. One theory is thatpeople with a good sense of direction have simply worked harder at developing it. Research being carried out at Liverpool University supports this idea and suggests that if we don’t use is, we lose it.“Children as young as seven have the ability to find their way around,” says Jim Martland, Research Dire ctor of the project. “However, if they are not allowed out alone or are taken everywhere by car, they never develop the skills. ”Jim Martland also emphasizes that young people should be taught certain skills to improve their sense of direction. He makes the following suggestions:●If you are using a map, turn it so it relates to the way you are facing.●If you leave your bike in a strange place, put it near something like a big stone or a tree. Note landmarks on the route as you go away from your bike. When you return, go back along the same route.●Simplify the way of finding youINDENT:r direction by using lines such as streets in a town, streams, or walls in the countryside to guide you. Count your steps so that you know how far you have gone and note any landmarks such as tower blocks or hills which can help to find out where you are.Now you need never get lost again!65. Scientists believe that_______.A. some babies are born with a sense of direction.B. people learn a sense of direction as they grow olderC. people never lose their sense of directionD. everybody possesses a sense of direction from birth66. What is true of seven-year-old children according to the passage?A. They never have a sense of direction without mapsB. They should never be allowed out alone if they lack a sense of directionC. They have a sense of direction and can find their way aroundD. They can develop a good sense of direction if they are driven around in a car.67. If you leave your bike in a strange place, you should ________.A. tie it to a tree so as to prevent it from being stolenB. draw a map of the route to help remember where it isC. avoid taking the same route when you come back to itD. remember something easily recognizable on the route68. According to the passage, the best way to find your way around is to ________.A. ask policemen for directions.B. use walls, streams, and streets to guide yourselfC. remember your route by looking out for steps and stairsD. count the number of landmarks that you see(B)“Come in, Kim. Have a seat, please,” said Bill Williams, the manager. “this was Kim’s first experience with an assessment. After only six months he was due for a raise if this assessment was satisfactory.“Kim,” began Bill Williams, “I am very pleased with the quality of your work. I have nothing but praise for your devotion and your hard work. My only concern is that youe: exac are not active enough in putting forward your suggestions. ”“But,” replied Kim, “I have always comp leted every assignment you have given me. Mr. Williams. ”“I know that, Kim. And please, call me Bill. But what I expect is for you to think independently and introduce new ideas. I need more input from you—more feedback on how things are going.I don’t need a “yes man”. You never tell me what you think. You just smile as though everything is fine. ”“But,” said Kim, “I feel that since you are my superior, it would be presumptuous of me to tell you what to do. ”“I’m not asking you to tell me what to do, but what you think we could do. To make suggestions, I employed you because I respect your experience in this field, but you are not communicating your thoughts to NT-SIZE: 10.5pt; me. ”“Yes. I see. I’m not accustomed to this, but I will try to do as you say…Bill. ”“Good, then, I expect to hear more from you at staff meetings or at any other time you want to discuss an idea with me. ”“Yes, of course. Thank you, Mr. Will…Bill. ”69. Kim is the sort of employee who_______.A. does not speak out his own ideasB. is not devoted to the jobC. laughs too much over workD. can not finish hiswork on time70. The word “presumptuous” in the middle of the passage is closest in meaning to “_____”.A. full of respectB. too confident and rudeC. lacking in experienceD. too shy and quiet(C)Across the world, 1. 1 billion people have no access to clean drinking water. More than 2. 5 billion people lack basic sanitation. (Across the worldily: 卫生设备)The combination proves deadly. Each year, diseases related to inadequate water and sanitation kill between 2 and 5 million people and cause an estimated 80 percent of all sicknesses in the developing world. Safe drinking water is a precondition for health and the fight against child death rate, inequality between men and women, and poverty.Consider these facts:●The average distance that women in Africa and Asia walk to collect water is 6 kilometers.●Only 58 percent of children in sub-Saharan Africa are drinking safe water. , and only___37___percent of children in South Asia have access to even a basic toilet.●Each year in India alone, 73 million working days are lost to water-borne diseases.Here are three ways you can help:1) Write CongressCurrent U. S. foreign aid for drinking water and sanitation budgets only one dollar per year per American citizen. Few members of Congress have ever received a letter from voters about clean drinking water abroad.2) Sponsor a project with a faith-based organizationMany U. S. religious groups already sponsor water and sanitation projects, working with partner organizations abroad. Simply put a single project by a U. S. organization can make safe water a reality for thousands of people.3) Support nonprofit water organizationsNumerous U. S. -based nonprofits work skillfully abroad in community-led projects related to drinking water and sanitation. Like the sample of non-profits noted as follows: some organizations are large, other small-scale, some operate worldwide, others are devoted to certain areas in Africa, Asia, or Latin America. Support them generously.72. The three facts presented in the passage are used toillustrate that ______.A. poverty can result in water-borne diseasesB. people have no access to clean drinking waterC. women’s rights are denied in some developing countries<=/o:p>D. safe drinking water should be a primary concern73. The intended readers of the passage are ______.A. AmericansB. overseas sponsorsC. CongressmenD. U. S. -based water organizations74. The main purpose of the passage is to call on people to ______.A. get rid of water-related diseases in developing countriesB. donate money to people short of water through religious groupsC. fight against the worldwide water shortage and sanitation problemD. take joint action in support of some nonprofit water organizations75. What information will probably be provided following the last paragraph?A. A variety of companies and their worldwide operation.B. A list of nonprofit water organizations to make contact with.C. Some ways to get financial aids from U. S. Congress.D. A few water resources exploited by some world-famous organizations.(D)Equipped only with a pair of binoculars (双筒望远镜Equipped only wNT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'">) and ready to spend long hours waiting in all weathers for a precious glance of a rare bullfinch(红腹灰雀). Britain’s birdwatchers had long been supposed to be lovers of a minority sport. But new figures show birdwatching is fast becoming a popular pastime, with almost three million of us absorbed in our fluttering feathered friends.Devoted birdwatchers, those prepared to travel thousands of miles for a sighting of a rare Siberian bird, are fast being joined by a new breed of follower whose interest is satiated by watching a few finches (雀科鸣鸟) on a Sunday walk or putting up a bird-box in the back garden.“Almost three million UK birdwatchers is certainly possible if you include everyone with only a casual interest,” St ephen Moss said in his newly published book—A Bird in the Bush: a Social History of Birdwatching—which records the pursuit from the rich Victorian Englishman’s love of shooting rare birds to the less offensive observational tendencies of birdwatchers today.Television wildlife programmes have helped to fuel the new trend. Last summer, BBC 2’s Britain Goes Wild was a surprise success. It pulled in three million viewers and led to bird-houses selling out across the UK as 45,000 people promised to put up a box.Birdwatchers’ networking system first came to the attention of the nation in 1989, when a birdwatcher caught sight of the first Vermivora chrysoptera—a golden-winged songbird from North America—to be seen in Britain. He put a message out on the network service Birdline, and next day 3,000 birdwatchers proved the full pull of a truly rare bird as they visited the Tesco car park in Kent, where it had settled. Today, birdwatchers can log on to www. birdline. co. uk or have news of the latest sightings texted to their phones.“Multimillion-pound spending on binoculars, bird food and boxes point to the increasing numbers of birdwatchers,” said David Cromack, the editor of Bird Watching magazine, “The number of people involved is so big that they have great potential to influence government decisions affecting the environment. ”76. The word “satiated” in paragraph 2 can best be replaced by “_______”.A. affectedB. sharedC. satisfiedD. narrowed77. What happened after the message of seeing a Vermivora chrysoptera was put on the network?A. Birdwatchers helped the rare bird settle in Kent.B. Large numbers of birdwatchers went to view the bird.C. Many birdwatchers logged on to the website for details.D. Birdwatchers showed their determination to protect the rare bird.78. Which of the following CANNOT be true according to the passage?A. Television wildlife programmes started the popular pastime of birdwatching.B. The network service has contributed to the rapid development of birdwatching.C. Birdwatching in Britain was long considered a sport with a small group of followers.D. The current situation of birdwatching may promote the protection of the environment.79. The passage mainly tells us about ______ in UK.A. the history of birdwatchingB. a growing passion for birdwatchingC. the impact of media on birdwatchingD. birdwatching as a popular expensive sport(E)Directions: Read the following text and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need.Directions: Read the followingA. Goods for auction salesB. Definition of biddingC. Way to sell more goods by auctionD. Auction sales in historyE. Brief introduction to auctionsF. Making a larger profit as an auctioneer80. ________Auctions are public sales of goods, conducted by an officially approved auctioneer. He asks the crowd assembled in the auction-room to make offers, or “bids”, for the various items on sale. He encourages buyers to bid higher figures, and finally names the highest bidder as the buyer of the goods. This is called “knocking down” the goods, for the bidding ends when the auctioneer strikes a small hammer on a table at which he stands.81. ________The ancient Roman probably invented sales by auction, and the English word comes from the Latin auction, meaning 273.“increasing”. The Romans usually sold in this way the goods taken in war. In England in the eighteenth centuries, goods were often sold “by the candle”: a short candle was lit by the auctioneer, and bids could be made while it stayed alight.82. ________Practically all goods whose qualities vary are sold by auction. Among these are coffee, skins, wool, tea, furs, silk and wines. Auction sales are also usual for land and property. Furniture, pictures, rare books, old china and similar works of art.83. ________ARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 18pt; TEXT-ALIGN: justify; tab-stops: 105.0pt 189.0pt 273.0pt; mso-char-indent-count: 2.0; mso-line-height-rule: exactly">An auction is usually advertised beforehand with full particulars of the articles to be sold and where and when they can be viewed by potential buyers. If the advertisement cannot give full details, catalogues are printed, and each group of goods to be sold together, called a “lot”, is usually given a number. The auctioneer need not begin with Lot 1 and continue in the order of numbers: he may wait until he notices the fact that certain buyers are in the room and then produce the lots they are likely to be interested in.84. ________The auctioneer’s services are paid for in the form of a percentage of the price the goods are sold for. The auctioneer therefore has a direct interest in pushing up the bidding as high as possible. He will not waste time by starting the bidding too low. He will also play on the opponents among his buyers and succeed in getting a high price by encouraging two business competieretors to bid against each other.第Ⅱ卷（共45分）Ⅰ. TranslationDirections: Translate the following sentences into English, using EXT-ALIGN: justifythe words given in the brackets.1. 我希望尽快收到你的照片。
2005年广东高考英语试题及答案
英文资料及中文翻译One A brief introduction of DDS system1 the basic principle of DDSThe basic principle is to use DDS sampling theorem, through the querying method produce waveform. The structure of DDS has a lot of kinds, the basic of the circuit principle available figure 1-1 to said.Figure 1-1 DDS schematicPhase accumulators by N a adder and N a accumulate registers cascade composition. Each to a clock pulse fs, adder will frequency control word k and accumulate registers the accumulation phase output data together and add the results of data sent to accumulate register input. Accumulate registers adder will last clock pulse that is produced when the new role of the phase to the adder feedback data input, so that the adder next clock pulse under the effect of frequency control word to continue with adding together. So, phase accumulators under the action of the clock, increasing the frequency control word to linear phase to attack. Can see from this, phase accumulators in each clock pulse input, the frequency control word accumulate a, phase accumulators output data is the signal of the synthetic phase, phase accumulators spillover frequency is the signal frequency DDS output. Using phase accumulators output data as waveform memory (ROM) of the phase of the sampling address, so just put the stored in memory of the waveform sampling waveform in value (binary code) find out by the look-up table, completed phase to amplitude conversion. The output waveform memory to D/A converter, D/A converter is the digital quantity of the wave form amplitude convert required amount of frequency synthesis simulation form signal. Low-pass filter used to filter out do not need tosample weight, so that the output spectrum pure sine wave signal. DDS in relative bandwidth, frequency conversion time, high resolution, phase continuity, orthogonal output and a series of integrated performance indexes far more than the traditional frequency synthesis technology can reach the level, for the system to provide the superior performance of simulation signal source.2 DDS performance characteristics(1) the output frequency relative bandwidth is wideOutput frequency bandwidth for 50% fs (the theoretical value). But considering the low-pass filter features and design of difficulty and the output signal stray suppression, the actual output frequency bandwidth still can reach 40% fs.(2) frequency conversion time is shortDDS is a open loop system, without any feedback part, this structure makes DDS of frequency conversion time is very short. In fact, in the frequency of DDS control word after the changes required to pass through a clock cycle according to the new phase after incremental accumulate, can realize frequency conversion. Therefore, frequency conversion control word frequency is equal to the time of transmission time, also is a clock cycle time. The clock, the higher the frequency, the transition time is shorter. The frequency conversion time DDS Dana seconds orders of magnitude, the frequency of use other than synthetic methods are short several orders of magnitude.(3) the frequency resolution is extremely highIf the clock frequency of fs changeless, the frequency of DDS by phase accumulators resolution of the digits N decision. As long as the increase of the phase accumulators digits N can obtain arbitrarily small frequency resolution. At present, most of the resolution of the 1 Hz DDS in order of magnitude, many less than 1 MHz even smaller.(4) continuous phase changesChange DDS output frequency, in fact changed each clock cycle of the phase of the delta, phase function curve is continuous, just in the frequency of the frequency change moment happened mutations, so keep the signal phase continuity.(5) the flexibility of output waveformAs long as the internal and the corresponding control such as DDS FM control FM, phase-modulation control PM and an AM control AM, that can be flexible to realize FM, jamming and an AM function, produce FSK, PSK, ASK and MSK signal etc. In addition, as long as the waveform DDS in memory store different waveforms, can achieve all kinds of output waveform, such as triangle wave, the sawtooth wave and rectangular wave even any waveform. When the waveform memory storage DDS respectively sine and cosine functions table, we can get the two orthogonal way output.(6) other advantagesBecause in almost all parts of DDS belongs to the digital circuit, easy to integration, low power consumption, small volume, light weight, high reliability, and easy to program, use a flexible, so high performance to price ratio.Two AT89S52 SCM profileAT89S52 devices for ATMEL by the production of a low power consumption, high performance CMOS8 a micro controller, and has 8 K in system programmable Flsah memory.1 AT89S52 devices main function lists are as follows:1, have clever 8 bits CPU and in the system programmable Flash2, the chip with internal clock oscillator (the highest working frequency to traditional 12 MHz)3, internal program memory (ROM) for 8 KB4, internal data memory (RAM) for 256 bytes5, 32 programmable I/O mouth line6, 8 interrupt vector source7, three 16 timer/counter8, level 3 encryption program memory9, full-duplex UART serial channel2 and AT89S52 devices each pin function is introduced:VCC:AT89S52 devices power is the input, meet + 5 V.VSS:The power to end.XTAL1:Single chip system clock of inverse amplifier input terminal.XTAL2:The system clock inverse amplifier output terminal, generally in the design as long as XTAL1 and put the XTAL2 in a quartz crystal oscillation system can action, in addition to the two pins and to join a 20 PF between the small capacitance, can make the system more stable, avoid noise interference and crash.RESET:AT89S52 devices reset pin, high level action, when to chip reset, as long as this pin level up to high level and keep two machine cycle more time, AT89S51 and can finish the various movements of the system reset, make internal special function of the register contents shall be set to the known condition, and to address 0000 H began to read in a program code and execution procedures.EA/Vpp:"EA" for English "External Access" of the abbreviations, said Access External program code of Italy, low level action, that is when this pin meet low level, the system will Access External program code (stored in External EPROM) to execute a program. So in 8031 and 8032, EA pin must meet low level, because its internal no program memory space. If is the use of the internal process 8751 space, the pin to pick up into high level. In addition, the program code in 8751 when the drive to internal EPROM, can use the pin to input and V burn high pressure (Vpp).ALE/PROG:ALE is English "Address Latch Enable" of the abbreviations, said Address latches Enable signal. AT89S52 devices can use a pin to trigger the external eight latches (such as 74 LS373), will port 0 address bus (A0-A7) lock into the latches, because in many ways of AT89S52 work send address and data. At ordinary times in the program execution ALE the output of the pin frequency is about 1/6 of theworking frequency of the system, and it can be used to drive the other perimeter of the chip, and the input. In addition the drive in 8751 the program code, the pins will be as the special programming function to use.PSEN:This as "Program Store Enable" abbreviation, its meaning for the Program to Store opening, when 8051 were set become external Program code read work mode (EA = 0), will send the signal in order to obtain the Program code, usually the supporting feet is received EPROM OE the feet. AT89S52 devices can use PSEN and RD pin existing external opening respectively RAM and EPROM, allow the data storage and program memory can be combined together and share 64 K addressed range.PORT0 (P0.0 ~ P0.7) :Port 0 is a 8 bits wide Open Drain (Open Drain) two-way I/o port, a total of eight bit, P0.0 said a 0, P0.1 said a 1, by analogy. The other three I/O port (P1, P2, P3) does not have this circuit configuration, but internal one ascension circuit, P0 in as I/O only can push eight the LS TTL load. If when EA pin for low electricity at ordinary times (i.e. access external program code or data storage), in many ways P0 work provide the address bus (A0-A7) and the data bus (D0 ~ D7). The designer should be plus latches will port 0 send out address switch to lock become A0-A7, together with the port 2 send out the A8 ~ A15 to synthesize a complete 16 the address bus, and addressed to the 64 K external memory space.PORT2 (P2.0 ~ P2.7) :Port 2 is a circuit of the internal ascension two-way I/O port, each pin can push four the LS TTL load, if the port 2 output set to high electricity at ordinary times, this port can be as input to use. Except as general P2 I/O port use outside, if in the external expansion program memory AT89S52 or data storage, and provide the address bus high byte A8 ~ A15, this time P2 cannot as I/O to use.PORT1 (P1.0 ~ P1.7) :Port 1 also is to have internal ascension circuit two-way I/O port, the output buffer can push four LS TTL load, as if the port 1 output set to high level, is this port to input data. If is to use the 8052 or 8032 words, P1.0 and as the external input pulsetimer 2 feet, and P1.1 can have T2EX function, can do external interruption of input feet a trigger.PORT3 (P3.0 ~ P3.7) :Port 3 also have internal ascension circuit two-way I/O port, the output buffer can push four TTL load, and also many other additional tools have special function, including serial communication, and external interruption, control and time count control and external data memory read or write to content control etc. Function.The distribution of pins are as follows:P3.0: RXD, serial communication input.P3.1: TXD, serial communication output.P3.2: INT0, external interruption 0 input.P3.3: INT1, external interruption 1 input.P3.4: prearcing, timing counter 0 input.P3.5: T1, timing counter 1 input.P3.6: WR: external data memory to the signal.P3.7: RD, external data memory read the signals.RST: reset input. When oscillator reset device to keep RST foot two machine cycle time of high level.ALE/PROG: when access to external storage, address lock to save the output level of allowed for lock to save the status of address byte. In the FLASH programming period, the pin to enter the programming pulse. In normal times, the ALE with the same frequency output cycle is the pulse signal, the frequency of the oscillator frequency of 1/6. So it can be used against external output pulse or used for timing purpose. However, to note: when used for external data storage, will jump over a ALE pulse. If want to ban the ALE output can be in SFR8EH address for 0. At this time, only in the execution MOVX ALE, MOVC instruction is ALE to take effect. In addition, this pin is slightly push. If microprocessor in external execution ALE banned, buy a null and void./ PSEN: external program memory storage, choose communication. In the external program memory to take during each machine cycle twice/PSEN effective. But on a visit to external data storage, the two effective/PSEN signals will not appear./ EA/VPP: when/EA keep low electricity at ordinary times, in this period is external program memory (0000 H-FFFFH), no matter whether have internal program memory. Note encryption 1, / EA will RESET for internal lock; When/EA end keep high electricity at ordinary times, internal program memory here. In the FLASH programming period, this pin is also used for 12 V power supply on programming (VPP).XTAL1: the inverting oscillator amplifier input and input to the internal clock operating circuit.XTAL2: from the output of the reverse oscillator.Three AD9851 Brief introductionD9851 is ADI the company USES the advanced technology of DDS out high level of integration DDS frequency synthesizer, inside it includes programmable DDS system, high performance DAC and high speed comparator, can realize the digital programming the control of frequency synthesis and clock happen. AD9851 interface simple control function, can use eight parallel port or direct input frequency serial port, such as phase control data. 32 bit frequency control word, the 180 MHz clock, output frequency resolution of 0.0372 Hz. Advanced CMOS technology not only makeAD9851 first-class performance index, and low power consumption, in 3.3 V power supply, power consumption only for 155 mW.1 each pin is introduced:D0 ~ D7:8 bits of data input port, can give internal registers a 40 a control data.PGND: six times as reference clock frequency of an.PVCC: six times as reference clock frequency of an power supply.W-CLK: words into signals, rise along the effective.FQ-UD: frequency update the control signal, the clock up along the confirmation input data effectively.REFCLOCK: external reference clock input.AGND: simulation.AVDD: simulation power supply (+ 5 V).DGND: digital.DVDD: digital power supply (+ 5 V).Rset: through the series a resistance to set the current session DAC output.VOUTN: internal comparator negative to the output.VOUTP: internal comparator positive output terminal.VINN: internal comparator negative input terminal.VINP: internal comparator positive input terminal.DACBP: DAC bypass connections end.IOUTB: "complementary" DAC output.IOUT: internal DAC output terminal.RESET: the RESET.2 principle analysis:AD9851 use direct digital synthesis (DDS) technology, digital control oscillator (DCO) form of a frequency/phase variable sine wave, through internal 10 high-speed number/mode conversion output analog signals. In comparison of high speed machine can simulate sine signals for change will be stable TTL/CMOS compatible square wave output.AD9851 high-speed DD5 kernel can receive 32-bit frequency control keyword input, and in the 180 MHz clock frequency resolution of the output for 180 MHz / (2 32 power). AD9851 internal provide a six times the frequency of an REFCLK times frequency, can through the external a low frequency clock produces 180 MHz benchmark of internal reference clock, and has good without stray dynamic range and phase noise. Provide in-house chip five programmable phase modulation accuracy, and can make the output waveform phase migration of less than 11.25 degrees;AD9851 internal China provides A high speed comparator, internal D/A converter deferent sine wave can through it converts square wave output.AD9851 control word frequency and phase adjusting words and can use parallel or asynchronous serial manner to load chip inside. Parallel loading mode has five consecutive eight bytes form, one of the first eight bytes including five phase adjusting words, a 6 * REFCLK times frequency is controlled, a power supply dormancy can make with a loading mode; The other four byte represents the 32-bit frequency control word. Serial load mode by 40 flow of data to form.Circuit can be considered as the DDS by a system clock and N a frequency control word decision digital prescaler, phase accumulators equivalent modulus of variable counter. By frequency control word decided to the counter of the modulus, next clock pulse began to phase accumulators to new phase incremental cohorts. Set the phase of the incremental, the bigger the accumulators cycle the faster a week, and the frequency of the output is higher.Four kinds of common problems1 what is the direct digital synthesis?Direct digital synthesis ( synthesis ) is a method of generating a simulated waveform-usually sine wave-by generate time-varying signals in a digital form, and then perform a digital to analog conversion. Because in a frequency device is digital, it can provide fast switching between output frequency, frequency resolution, and the operation frequency is wide. With advances in design and technology, today's technology and equipment is very compact and low power.2 using DDS what are the main benefits?The DDS AD9833 device programming, such as via a high-speed serial peripheral interface ( SPI ), and only requires an external clock to generate a simple sine wave. The DDS device is now can produce from 1to 400MHz frequency, ( clock based on103MHz MHz ). Power low efficiency, low cost, small packaging single, combined with the inherent excellent properties, and can be in digital form ( and reprogramming ) output waveform to the DDS device is a very attractive solution, compared to a less flexible molecular polymerization, including discrete solution.3 why should direct digital synthesizer ( frequency )? No other method is easy to generate frequency?Can accurately generate and control various frequency waveform and spectrum has become one of the key requirements common to a number of industry. Whether to provide flexible source of low-phase-noise variable-frequencies spurious performance good communication, or produce only one frequency stimulation industrial or biomedical application, convenient, compact, low cost is an important consideration in the design of.4 what are the main benefits of using frequency?High precision digital equipment such as program through a high speed serial peripheral-interface ( Interface ), and requires only an external clock to generate simple sine wave. Technology and equipment, is now able to generate frequencies below 1Hz to 400 Hz ( based on 1gigahertz clock ). Benefits of low power consumption, low cost, small packaging, combined with the inherent excellentproperties and the ability of the digital program ( and reprogramming ) waveform output, so that the control device is a very attractive solution-preferable to flexible solutions including aggregation of discrete element5 what is the meaning of DDS?D/A converter and a DDS single chip integration is often referred to as a complete DDS solution, ADI's common nature DDS.6 let's talk phase accumulator. How does it work?Continuous sinusoidal signal having a phase angle is repeated in the range of 0 to2digitization is no different. Counter function allows the phase accumulator as the implementation phase wheel.。