作业No.7参考答案
英语九上课堂作业参考答案
英语九上课堂作业参考答案一、词汇练习1. 根据题目所给的首字母提示，完成下列句子。
- I have a _______ (宠物) named Mimi.- The _______ (教室) is very clean and tidy.- She is a _______ (学生) in our school.- He is _______ (来自) Canada.- The _______ (图书馆) has a lot of books.答案：pet, classroom, student, from, library2. 用括号中所给词的正确形式填空。
- I am _______ (interest) in science.- She _______ (be) a teacher for ten years.- The _______ (child) are playing in the park.- The _______ (man) over there is my uncle.- We _______ (have) a meeting tomorrow.答案：interested, has been, children, man, are having3. 根据句意，用适当的副词填空。
- The children _______ (非常) love the new playground. - She sings _______ (非常好).- He _______ (经常) goes to the gym.- The story is _______ (非常) interesting.答案：really, beautifully, often, very二、语法练习1. 将下列句子改为一般疑问句，并作肯定和否定回答。
- She is a teacher.- They have a big house.- He can play the piano.答案：- Is she a teacher? Yes, she is. / No, she isn't.- Do they have a big house? Yes, they do. / No, they don't. - Can he play the piano? Yes, he can. / No, he can't.2. 将下列句子改为否定句。
大学物理作业学生新版答案
班级________学号_________姓名_________成绩_______
一、选择题
1.一质点在平面上作一般曲线运动，其瞬时速度为 ，瞬时速率为 ，某一段时间内的平均速度为 ，平均速率为 ，它们之间的关系有
[](A) (B)
(C) (D)
2.某物体的运动规律为 ，式中的k为大于零的常数。当t＝0时，初速为 ，则速度v与t的函数关系是
(C)顶点a、c处是正电荷，b、d处是负电荷．
(D)顶点a、b、c、d处都是负电荷．
6、下面说法正确的是：
[]（A）等势面上，各点场强的大小一定相等；
（B）在电势高处，电势能也一定高；
（C）场强大处，电势一定高；
（D）场强的方向总是从电势高处指向电势低处。
7、两个薄金属同心球壳，半径各为 和 ( )，分别带有电荷 和 ，两者电势分别为 和 (设无穷远处为电势零点)，将两球壳用导线连起来，则它们的电势为：
[ ](A) (B)
(C) (D)
3.在带电量为－Q的点电荷A的静电场中，将另一带电量为q的点电荷B从a点移到b点，a、b两点距离点电荷A的距离分别为r1和r2，如图所示。则在电荷移动过程中电场力做的功为
[](A) ；(B) ；
(C) ；(D) 。
4.某电场的电力线分布情况如图所示，一负电荷从M点移到N点。有人根据这个图得出下列几点结论，其中哪点是正确的？
(A)1＞2，S＝q/0．
(B)1q/0．
（D）1＜2，S＝q/0
4、关于高斯定理的理解有下面几种说法，其中正确的是（）
（A）如果高斯面上 处处为零，则该面内必无电荷；
（B）如果高斯面内无电荷，则高斯面上 处处为零；
通信初级工习题库+参考答案
通信初级工习题库+参考答案一、单选题（共86题，每题1分，共86分）1.在距离牵引供电何必高压带电部分()以外，与回流线、架空地线、保护线保持()以外，邻近铁路营业线作业时，牵引供电设备可不停电。
A、1米/1米B、2米/1米C、2米/2米D、1米/2米正确答案：B2.铁路通信维规规定数据网设备CPU利用率应小于()。
A、0.5B、0.6C、0.7D、0.8正确答案：C3.以下不属于传输网设备半年检修的工作项目是()A、设备地线检查B、风扇清扫C、以太网电路丢包率测试D、备用电路误码测试正确答案：B4.计算机病毒破坏的主要对象是()。
A、磁盘片B、磁盘驱动器C、CPUD、程序和数据正确答案：D5.()的网络是实现列车运输指挥的专用网络，是重要的行车设备。
A、TDCSB、TMISC、SCADAD、THDS正确答案：A6.视频会议业务端到端性能单项时延应小于()。
A、100msB、150msC、400msD、200ms正确答案：B7.任意两个同频小区之间的距离称为()复用距离。
A、异步B、异频C、同步D、同频正确答案：D8.蓄电池容量测试仪测试盒连接时要确认电池组单节电池电压是12 V、()。
不同的电池选择不同的测试线。
A、6 V、4 V、2 VB、4 V、3 V、2 VC、8 V、4 V、2 VD、6 V、5 V、4 V正确答案：A9.华为DCCU模块实现()转接和EMI滤波的功能。
A、光B、电C、信号D、数字正确答案：C10.率先垂范、当好公仆，集中体现了铁路企业()的职业道德的特点。
A、干部B、全体员工C、党员D、部分员工正确答案：A11.[T]B-B-A-003 521以太网包括()和星型两种拓扑结构。
A、总线型B、树状型C、环型D、线型正确答案：A12.HONET中，OLT和ONU概念的区别()。
A、在业务提供能力上B、业务比较集中的点称为ONUC、仅仅是物理位置和机械结构上D、通常将配备有网管网元BAM与网管系统相通的点称为ONU正确答案：C13.数字列车广播机由电源、信源、（）、功率放大器部分构成。
学英语报答案
资料范本本资料为word版本，可以直接编辑和打印，感谢您的下载学英语报答案地点：__________________时间：__________________说明：本资料适用于约定双方经过谈判，协商而共同承认，共同遵守的责任与义务，仅供参考，文档可直接下载或修改，不需要的部分可直接删除，使用时请详细阅读内容[标签:标题]篇一：学英语报纸12期答案第二版同步课堂Unit 11 connect; to2 C3 B4 to draw Unit21 B2 D3 Do; make travel plans4 send词语贴士1 search for information2 search; for3 search his clothes 语法在线1 How2 Who3 How many4 Where5 Which6 When/What time7 What8 How old第三版Unit 1Ⅰ 1 screen 2 print 3 paper 4 Finally 5 keyboardⅡ 1 learn 2 uses 3 coonect 4 click 5 saveⅢ 1 boxes 2 first 3 its 4 to open5 miceⅣ 1 turn on 2 on the left of 3 Put; in 4 What about 5 of course Unit2Ⅰ 1 visit 2 often 3 customers4 pllan 5 games篇二：七年级学英语报纸寒假版参考答案寒假专版参考答案第1版寒假作业（一）词汇与句型篇词汇运用Ⅰ. 1-5 cdebaⅡ. 1. German 2. age 3. hobbies4. mountains 5. frien dly6. never7. Geography8. break9. guitar10. togetherⅢ. 1-5 ACACDⅣ. 1. is from2. look like 3. lives with4. eating out5. arrive at6. helping; with7. am good at8. on the Internet9. go to bed 10. take the bus句型演练Ⅰ. 1. teeth 2. playing 3. friendly 4. elder5. German6. to be7. to go8. running9. playing 10. listening Ⅱ. 1. enjoy/like2. seldom3. elder; dreams4. by bus5. favourite sport第2版寒假作业（二）语法专练Ⅰ. 1-5 DBACA 6-10 DACBDⅡ. 1. Does Kate want 2. Which man 3. doesn’t play 4. How often5. Yes; he does6. When is7. Does Peter take8. parents’ ages9. How many flats10. No; they don’tⅢ. 1. Germany 2. hobbies3. playing4. friends 5. twice6. goes7. to be8. Does; doesn’t9. times 10. likesⅣ. 1. an ice cream 2. seldom goes out 3. wants to be4. twice a week5. helps me buyⅤ. 1. D a改为an 2. A long改为often 3. A not之前加do4. A Which改为What5. B wash改为washes第3版寒假作业（三）读写综合篇补全对话A篇 1-5 FDEACB篇 1-5 GEFBD完形填空1-5 ABDDB 6-10 CACCB阅读理解1-5 BCDCD书面表达One possible version:Pleasant Goat and Force Goat are good friends. They both help Slow Goat a lot. But theyaren’t the same. Pleasant Goat runs faster than other goats. He is happy and outgoing. He always has smiles on his face. Force Goat is stronger but more careless than others. He exercises every day to keep healthy, but he gets angry easily. He always disagrees with others.第4版寒假作业（四）词汇与句型篇词汇运用Ⅰ. 1. protect2. large 3. burn 4. pollute 5. wetⅡ. 1. spend 2. blows 3. snowy 4. grandparents5. burn6. few7. trip8. problems9. into 10. largeⅢ. 1-5 BBAACⅣ. 1. on the land2. put; into 3. flying kites4. at this time of year5. on the beach6. in the hot weather7. throw away8. fall from9. plant trees10. in the south of句型演练Ⅰ. 1. sunny2. to have3. kites 4. brightly5. talking6. Is7. go8. pollution9. interesting10. snowmenⅡ. 1. get warm 2. is some3. dangerous to4. weather like5. provides; with6. go on7. spend8. One quarter第5版寒假作业（五）语法专练Ⅰ. 1-5 DBCAB 6-10 ACBDCⅡ. 1. Are there any 2. It is important 3. What’s; like4. There isn’t5. What; look like6. Is it snowy7. Yes; there is8. It is exciting9. birds are there10. These computers areⅢ. 1. is 2. windy 3. interesting 4. are 5. to learn6. women7. are8. lovely9. to have 10. funnyⅣ. 1. There is2. It is interesting3. a cup of coffe e4. far from here5. warm these daysⅤ. 1. A is改为are2. D homeworks改为homework 3. C pair改为pairs4. D a改为an5. C finishing改为to finish第6版寒假作业（六）读写综合篇补全对话A篇 1-5 DCFBAB篇 1-5 FGBAC完形填空1-5 ACADD 6-10 BCBDA阅读理解1-5 CBCAD书面表达One possible version:Hello, everyone.I have a healthy lifestyle. Every morning I exercise with my father. We often run and play basketball. I have a good eating habit.I try to eat more fruit and vegetables, and I hardly ever eat junk food. I drink milk every morning. I think it’s good for my health.In my free time, I never play computer games. Usually I go to bed early and get up early.第7版寒假作业（七）词汇与句型篇词汇运用Ⅰ. 1-5 beadcⅡ. 1. diary 2. nervous3. camera 4. postcard5. machine6. guide7. bridge8. direction9. beauty 10. buildingⅢ. 1-5 CCDBAⅣ. 1. feel about 2. are going to 3. such as4. get weak5. light up6. Are; able to7. tie; to 8. in every direction 9. One of10. go bad句型演练Ⅰ. 1. beauty 2. sightseeing 3. to have 4. friends5. send6. places7. take8. to teach9. leave10. will have Ⅱ. 1. haveto2. in the centre of3. so that4. as; as we can5. walk alongⅢ. 1. don’t like 2. No; they aren’t3. How many第8版寒假作业（八）语法专练Ⅰ. 1-5 CDABA6-10 DBCABⅡ. 1. are going to 2. Is Sam going 3. No, he won’t4. Yes; it is5. isn’t going toⅢ. 1. have 2. asks 3. walk 4. are 5. doesn’t6. fails7. to use8. forgets9. likes 10. comesⅣ. 1. can finish it2. in two hours3. will play with4. are going to the museum5. If you need itⅤ. 1. B 去掉will2. B having改为have3. D am going to改为will4. D 去掉goin g5. B don’t改为doesn’t6. C snowing改为snow7. D去掉will 8. B worked改为works9. D won’t改为will10. A going not改为not going第9版寒假作业（九）读写综合篇补全对话A篇 1-5 FDCEAB篇 1-5 FGDAB完形填空15 ABDCD 6-10 BCAAD阅读理解1-5 ABCDD书面表达One possible version: spent the vacation in different places. Jia Qian, Huang Fan and I went to Center Park. We took a lot of photos there. Liu Fan and Guo Wei went to the Phoenix Islands, Sanya. They did something interesting there. Zhang Yue and Kong Ying went toQingdao. There were many people swimming in the sea. They played beach volleyball with their friends. We all had fun.第10版寒假作业（十）词汇与句型篇词汇运用Ⅰ. 1. attend2. recent3. amazing 4. ant 5. followⅡ. 1. rocket 2. butterfly 3. headlines 4. ago 5. information6. stamp7. disappeared8. granddaughter9. newspaper 10. something Ⅲ. 1-5 BBDACⅣ. 1. drawing pictures2. disappeared into3. go inside4. a collector of5. Are; interested in6. is bad for7. go for a walk8. all the way9. launch; into 10. a waste of句型演练Ⅰ. 1. hers 2. to play3. amazing 4. to writ e 5. to begin6. water7. surprised8. unusual9. collection10. studyingⅡ. 1. a picture of2. how to3. living room4. to take5. playingⅢ. 1. Can you help me look for the remote control?2. Is the magazine yours or his?3. My mother wants me to learn about some skills.第11版寒假作业（十一）语法专练Ⅰ. 1-5 BADCA6-10 BDABCⅡ. 1. Yes; she did 2. is Linda’s 3. did Jenny leave4. didn’t clean5. did John do6. Did Tom bring7. Whose jacket8. No; they didn’t9. What was; like10. Is this Mary’sⅢ. 1. came 2. him 3. join ed 4. Their 5. sent6. was7. its8. her9. had10. hisⅣ. 1. visited our school 2. played the guitar 3. him some old pictures4. ate a hamburger5. isn’t oursⅤ. 1. D walk改为walked 2. D her改为hers 3. A puts改为put4. B stayed改为stay5. C it’s改为its第12版寒假作业（十二）读写综合篇补全对话A篇 1-5 DFEABB篇 1-5 GFBCA完形填空1-5 ABDBC 6-10 DBCAA阅读理解1-5 ABCCD书面表达One possible version: My favorite star is Jackie Chan. He is a great actor. I like him very much. I think his movies are exciting and he is a friendly movie star. Most of his movies are very successful action movies. I like his movies best.Jackie Chan is one of the most popular stars in the world. He is living in Hong Kong now. He likes Beijing Opera. He has many fans, like me.篇三：九年级学英语报答案九年级学英语报答案一、听力测试（共20小题，计25分)注意：听力测试分四部分，共25小题。
七年级下英语周报暑假作业1-8期答案
暑假作业第1期参考答案第1版话题阅读1-3 TFF百科掠影1. The Penny Black of England. 2. Queen Victoria. 3. The person who got the letter.第4版词汇与句型专练Ⅰ. 1.describe 2. cultures 3. interviewed 4. natural 5. produces 6. abroadⅡ. 1. interesting 2. boring 3. suddenly 4. mend 5. fun 6. sleepingⅢ. 1-5 CDAABⅣ. 1. communicates with 2. on Earth 3. such as 4. one of the most 5. was based on 6. stopped; from goingⅤ. 1. at the same time 2. die out 3. For example 4. give out 5. in a way 6. more than 7. used to 8. isn’t interested inⅥ. 1. is famous as 2. He bought a beautiful dress for me. 3. allow; to join 4. the same as 5. suddenly智力快车七年级英语自测题（一）I. 1-5 DACBA 6-10 ACBDA 11-15 ACBBCⅡ. 16-20 ACDBC 21-25 DBCADⅢ. 26-30 DCBDC 31-35 DCBDA 36-40 BBDACⅣ. 41-45 FCABE 46-50 GBACEⅤ. 51. enjoy 52. is harmful to 53. at last 54. almost 55. stoneⅥ.Dear Joanna,I’m very glad you are visiting our city. Now let me tell you how to get to my home. After you get out of the train station, you can take the No. 8 bus to Yingbin Road. It takes about half an hour. The bus stop is near my home. It’s not very far from my home to the beach. We can go there on foot. It only takes 20 minutes. I hope to see you soon.Yours,Anna暑假作业第2期参考答案第1版话题阅读 1. No, they don’t. 2. In Africa. 3. A cartoon movie.文化视窗 1. Europe, 1960s 2. public; read 3. talk with; telephone第4版语法专练（A）I. 1-5 BCCBD 6-8 DDAII. 1. rich →the rich 2. the →a 3. is sounding →sounds4. sheeps →sheep5. many →much6. Who’s →WhoseIII. 1. is planning 2. tomatoes 3. glasses 4. ones 5. him; his 6. themselves 7. could 8. will be able toⅣ. 1. can’t 2. Whose pen pal 3. spent; going; on 4. not moving 5. Who’s your 6. That is an old desk.Ⅴ. 1. are coming 2. saw a; The 3. this; that 4. look after himself 5. May / Can拓展阅读1. In a park 2. Red. 3. Because she was different.七年级下英语自测题（二）I. 1-5 DCADB 6-10 DACDB 11-15 ABCDCⅡ. 16-20 CACDA 21-25 BBCDBⅢ. 26-30 BDACC 31-35CABBA 36-40 CBADBⅣ. 41-45 EAFDB 46-50 BFEDAⅤ. 51. Take; on the right 52. Why don’t you 53. belongs to 54. by herself 55. kept; from playing Ⅵ. (One possible version)Dear Sir or Madam,I would like to recommend Li Hua to be the leader of the Basketball Club of our school.Li Hua is tall and strong. He is good at playing basketball and knows a lot about basketball game. Li Hua is polite and helpful. He often helps his classmates when they are in trouble.Last Sunday, there was a basketball match between his class and Class Two. He played very well and helped his class win the match.Look forward to hearing from you soon.Yours faithfully,Wang Wei暑假作业第3期参考答案第1版话题阅读1-3TFF百科掠影1. China Central Television 2. May 1st 3. window第4版语法专练（B）I. 1-5 DAADC 6-10 CACDCII. 1. their →theirs 2. renmin road →Renmin Road 3. watches →is watching4. will come →am coming5. himself →him6. mustn’t →can’t7. Whose →Who’s 8. This →ThatIII. 1. him 2. Whites; starting 3. isn’t doing 4. their 5. tea; cups of water 6. whom 7. her 8. thoseⅣ. 1. can 2. mustn’t 3. Your; mine 4. should 5. That; fruit; that; this 6. whose books; those 7.fish are; are 8. May / Can; one 9. isn’t doing; is; doing 10. is walking slowly; has拓展阅读1-3 BAB脑筋急转弯1. You are too young to smoke!2. It did not want to be a hotdog.3. To get a new eye.4. A walk!5. Incorrectly.七年级下英语自测题（三）I. 1-5 CACCD 6-10 DABBA 11-15 CABCAⅡ. 16-20 CABDC 21-25 CDBCBⅢ. 26-30 CBADA 31-35 CABAC 36-40 BCDCAⅣ. 41-45 EDFAC 46-50 BECAFⅤ. 51. After he finished homework, he went to bed.52. Be careful or you may hurt yourself.53. He passed me a piece of paper.54. I paid 50 yuan for the hat. / I spent 50 yuan on the hat.55. Why are you so keen on old photos?Ⅵ. A.56. Hada Hill 57. bike 58. one 59. three 60. fiveB. (One possible version)Dear Bill,I’m very glad to know that you’ll come to visit Shenzhen next month. I’m just going to have a one-month holiday next month. We can go swimming, go fishing, climb hills and enjoy many kinds of delicious seafood. At the same time, we can learn languages from each other. By the way, please call me and tell me your flight number and the time. I’ll meet you at the airport.Best wishes to you and your family!Yours,Zhang Hao暑假作业第4期参考答案第1版话题阅读1-3 FTT文化视窗1. city square 2. The Monument to the People’s Heroes 3. east第4版阅读理解专练（A）A篇1-5 BACDB B篇6-10 BBDAD C篇11-15 CBADB拓展阅读1-3 ACC七年级英语自测题（四）I. 1-5 CCDBA 6-10 BCDBB 11-15 CDCACⅡ. 16-20 DBBAD 21-25 CACCBⅢ. 26-30DBDBC 31-35 BDADC 36-40 ACBCDⅣ. 41-45 FADBC 46-50 DGABEⅤ.51. Can you tell me what your mother look like? / Can you tell me something about your mother?52. I want to eat ice creams.53. She often offers help to us.54. What does he do?55. What do you think of the pollution?Ⅵ. (One possible version)Kangaroos live in Australia. They are gentle and lovely. They eat grass and leaves. They have large ears with short arms but long feet. They also have a long strong tail. Their back legs arestrong too. So they can jump very quickly and high. Mother kangaroos carry their babies in the pockets of the front of their bodies. It’s so amazing.Kangaroos are our friends. We should protect them well.暑假作业第5期参考答案第1版话题阅读1. Canada.2. 17.3. The piano, the drums, the trumpet and the guitar.百科掠影1-3 TFF第4版阅读理解专练（B）A篇1-5 BADDCB篇6. Between 9:30 a.m. and 11:30 a.m. from July 20th to July 30th7. The Children’s Palace, No. 58, Kaiyuan Street8. ￥3509. Sports; interest groups; English world10. 86281196C篇11-15 ADCBC七年级英语自测题（五）I. 1-5 ACBCC 6-10 CBACC 11-15 DCDBBⅡ. 16-20 ABDDC 21-25CABBDⅢ. 26-30 CBDBB 31-35 DACBB 36-40 CDABBⅣ. 41-45 BDEAF 46-50 FCEADⅤ. 51. The cat never appeared again.52. The book is boring / not interesting.53. The trousers are suitable for me.54. Why don’t you put on this hat? / What about putting on this hat?55. What is the weather like in Shenzhen?Ⅵ. (One possible version)Why are trees important?Trees are very important to us. Trees take in carbon dioxide from the air and make oxygen. That’s important. People and animals need oxygen to live. Many small animals and insects live in trees. Some of them also get food from trees. Trees can also stop water and soil from going away. You know, trees are green. They can make our country even more beautiful. Trees are our friends. We should plant more trees and take good care of them.暑假作业第6期参考答案第1版话题阅读1-3 TFF百科掠影1. 85% 2. More than 60% 3. Don’t touch第4版完形填空专练（A）A篇1-5 CDCAB 6-10 CBACDB篇1-6 BCACD 6-10 ACCABC篇1-5 DCCAA 6-10 DCBCB拓展阅读1-3 CAB智力快车七年级英语自测题（六）I. 1-5 DBDBD 6-10 AACBD 11-15 BADABⅡ. 16-20 BACDD 21-25 CACBAⅢ. 26-30 BACDA 31-35 BDADC 36-40 CBBCCⅣ. 41-45 BCDAF 46-50 CAEDBⅤ. 51. I don’t feel like eating now.52. What’s the matter with you?53. To play cards is not exiting.54. How do people turn electricity into light energy?55. Your answer is correct in a way.Ⅵ. A)56. Playing soccer. 57. In winter. 58. An actor. 59. Singing and dancing.60. His sister.B)(One possible version)Dear Jack,I’m happy to get your photos. Here are three photos of me.In the first photo, I’m taking a photo of a beautiful bird with my camera. I like birds. I think birds are our friends. In the second photo, what can y ou see? It’s raining. I am helping an old man with my friend, Sam. In the last photo, it’s very cold. We are wearing warm clothes and playing with the snow.Yours,Susan暑假作业第7期参考答案第1版话题阅读1-3 FTF文化视窗1. southeast 2. rivers 3. January, beginning第4版完形填空专练（B）A篇1-5 DCADB 6-10 DDBCAB篇1-5 ADDCB 6-10 CBAACC篇1-5 DCDAC 6-10 DDBAB拓展阅读1-3 FTT七年级英语自测题（七）I. 1-5 CBCCD 6-10 ACAAC 11-15 DDCDAⅡ. 16-20 CBCDA 21-25 BDBCDⅢ. 26-30 ADBBC 31-35 CDACB 36-40 CDBDAⅣ. 41-45 EAFDB 46-50 BCAFDⅤ.51. Shall we go for a walk after supper?52. The paper in your notebook all is from trees.53. I don’t know how to learn English well.54. Please look after your sister these two days.55. There is nobody in the theatre at daytime.Ⅵ. (One possible version)How to keep healthyAs we know, health is very important for everyone. As middle school students, first, we must have enough sleep, at least eight hours a day. Don’t stay up late. Second, we must do exercise for one hour every day either in the morning or in the afternoon. For example, we can run or play basketball. Third, we should have a balanced diet. We must have breakfast every morning. Fourth, it’s important to drink enough water and have plenty of fresh fruit and vegetables every day. If we do so, I am sure we can keep healthy.暑假作业第8期参考答案第1版话题阅读1. have fun 2. with their friends 3. doing volunteer and charity work百科掠影1-3 FFT第4版会话与写作专练补全对话A) 1-5 DFCEA B) 1-5 BECAD C) 1-5 ECGBD书面表达AYesterday afternoon, I saw a man opening my neighbour’s door when I arrived home. The man was holding a bag. I realized that he was a thief. I thought I was not strong enough to catch him. Suddenly, I got an idea. I took out my mobile phone and took a photo of the thief. Then I called the police. The police caught the thief very soon with the picture of the thief.BA) 1. London 2. half past nine 3. British Museum 4. have lunch 5. boatB) One possible versionThe weekend is coming. I’m going to do many things at the weekend. On Saturday morning, I’m going to have a piano lesson and clean the room in the afternoon. In the evening, I’m going to watch TV. On Sunday morning, I’m going to revise for the test because there’s going to be an English test next Monday. I’m going to do my homework in the afternoon and check emails in the evening. I think I’ll have a happy weekend.拓展阅读1-3 ACC七年级英语自测题（八）I. 1-5 BABBD 6-10 BADDC 11-15 BBACBⅡ. 16-20 DABAC 21-25 DBACBⅢ. 26-30 ABDCC 31-35 CDADD 36-40 CBCBAⅣ.41-45 CAEFB 46-50 DACGEⅤ.51. Lo is able to drive a car.52. You mustn’t smoke here.53. We use wood to make paper.54. He warned his son against playing in the river.55. The movie show seemed successful.Ⅵ. (One possible version)A)56. Washington D.C., America 57. Brighton, England 58. An actress 59. A farmer60. Likes singing for peopleB)One possible version:Today is August 15th. I bought a ticket for Liu Dehua’s concert a few days ago. Andy is his English name. He is my favourite singer.At 7:00 pm the concert began. I saw Andy face to face for the first time. He was very handsome and looked much younger than his age. His songs made us excited! The concert ended at 10:00 pm. On my way home, I was still excited. What a wonderful concert! I’ll never forget it.。
英语七年级上册作业本答案外研版【三篇】
谢谢关注祝您成功1英语七年级上册作业本答案外研版【三篇】【导语】初中英语是为同学们以后英语的学习打基础的，上面已经提到了，单词是作为最为基础的存在。
而语法同样也是初中英语之中的基础。
以下是为您整理的英语七年级上册作业本答案外研版【三篇】，供大家学习参考。
【Unit1答案】一、A 、bookB 、catC 、flowerD 、birdE 、dogF 、pencilG 、mapH 、pen二、HFGBEDCA一、1、What ’s ，football ，Write ，F-O-O-T-B-A-L-L ，Thankyou2、Wh What’sthis，at’sthis，at’sthis，aruler aruler aruler，，No No，，sorry sorry，，Howdo3、What’sthisinEnglish，It’san，、What’sthisinEnglish，It’san，youspellit youspellit youspellit，，E-R-A-S-E-R4、inEnglishHowmanybirds，，Thereare，HowmanybirdsinEnglish，四、1-7BBBBAAC五、1、What’sthisinEnglish？2、Writeitontheblackboard.3、Howdoyouspell”pencil”？Howmanybooksarethere？？4、Howmanybooksarethere5、Iamtwelveyearsold.【Unit2答案】一、1、monkey2、kite3、blackboard4、computer5、chicken6、panda7、clock8、car9、bike二、1、thankyou2、youarewelcome3、inEnglish4、saythatagain5、ofcourse6、helpme7、sorry8、don’tknow三、1、Canyou，what，How，spell，desk，saythat，ofcourse，Thankyou四、1-5IHJCF6-10DEGBA五、1、in，bird，Write2、spellspell，3、again4、help5、dogs【Unit3答案】一、略二、1、green2、yellow3、orange4、blue5、white6、black7、black8、brown一、1、Whatcolour2、spell3、blue4、are5、three四、1、What ，are ，They ’re2、in in，，bird bird，，Whatcolour3、Whatarethese Whatarethese，They’re，，They’re，，They’re，Whatcolourarethey Whatcolourarethey Whatcolourarethey，，Howmany Howmany，，Thereare五、1、red ，yellow ，blue2、orange3、purple4、green5、black。
七年级上学期英语作业本参考答案2020
七年级上学期英语作业本参考答案2020第一部分单项选择1----15 DBBCC BAABA DACBC16---30. DBABD ADDAB DBCBA31---45. CDBAA CAABC DBDCC46---60. CDCBD CADBB DACAD61---75. AABBA CBDBB CDBBC76---90. CBABC CADAB CDBCD91---105. BACCA CBDBD ADDBB106--120. DBBAA ACBDA DCBCD121--135. BDACB BCABD BAACB136--150. DBBAD DDBDA DDCAB151--165. DBBDA ADACD ABCCA第二部分词汇填空用所给单词的适当形式填空：1 speaking2 buying3 is4 to look5 swimmer swimming6 health healthily health7 fit8 singing9 letting 10 not to change 11 be 12 doing 13 to have 14 men’s 15 sitting 16 dances 17 telling18. Women teachers 19 take 20 reading 21 is watering 22 children’s 23 is 24 order 25 is 26 well 27 them 28 first 29 to get 30 really 31 designing 32 to be 33 exercises 34watches 35 giving 36 are cooking 37 to read 38.shopping 39 photos 40 doesn’t like 41 has 42 don’t be 43 to play 44 going 45 sheep 46 teeth 47 interested interesting 48 chatting 49 is cooking 50Collecting根据括号中所给汉语写出单词，使句子意思完整。
外研版(一起点)五年级上册M1—M10作业答案
【M1作业答案】一、抄写、默写本模块单词和短语(XY5AM101)。
二、读一读，写一写(XY5AM102)。
A. 选词填空，补全句子。
1.weren’t2.are3.wasn’t4.is5.wasB.根据图片或汉语提示，补全句子。
1.weren’t benches2.Yes does.3.there are4.China for5.How aboutC.用所给词的适当形式填空。
1.wasn’t2.children3.is4.feed5.is三、背诵重点功能语言(XY5AM103)。
四、读句子，结合所学内容判断句子的表达与图片情景是否一致。
一致的写“T”,不一致的写“F”(XY5AM104)。
1.F2.F3.T4.F5.T五、读句子，选择与图片内容相符的内容(XY5AM104)。
3 2 54 1六、根据思维图示复述课文（XY5AM105）。
【M2作业答案】Part I 基础性作业一、抄写、默写本模块单词和短语(XY5AM201)。
略二、根据提示完成句子（XY5AM202）。
A.根据汉语提示完成句子1. supermarket2.fruit3.Oranges4.Sweets5.heavyB. 用所给单词的正确形式填空。
1. is2.Families3.S ells4.me5.Go三、用there is或there are填空（XY5AM202）。
1. There are2.There are3.There is4.There are5.There is1.A2. B3. B4. A5. C四、背诵重点功能语言（XY5AM203）。
略五、观察所给的商品，仿照例句，尽可能多的运用形容词描述商品。
（XY5AM204）。
1.This schoolbag is beautiful and new. But it’s expensive.2.This coat is yellow. It’s beautiful.3.This toy is very cute. And it’s very big.4.Chips are very delicious.5.These fruit are very healthy. （仅供参考）六、根据思维导图复述Unit1课文内容，根据Unit2课文填空（XY5AM205）。
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No.7 光的衍射（答案）
◆ 学习目标
1. 理解惠更斯-菲涅耳原理以及如何用该原理解释光的衍射现象。
2. 了解夫琅禾费衍射和菲涅耳衍射的区别，掌握用半波带法分析夫琅禾费单缝衍射条纹的特点。
理
解用振幅矢量叠加法求单缝衍射光强分布的原理。
3. 了解圆孔夫琅禾费衍射光强分布特征，了解瑞利判据以及光的衍射对光学仪器分辨率的影响。
4. 掌握双缝衍射条纹特点，掌握光栅衍射计算主极大位置的光栅方程；理解光栅衍射条纹缺级条件。
5. 了解X 射线衍射的原理以及布拉格公式。
◆ 填空题
1. 当光通过尺寸可与 波长 相比拟的碍障物时，其传播方向偏离直线进入障碍物阴影区，并且光强在空间呈现 非均匀分布 的现象称为衍射。
形成衍射的原因可用惠更斯-菲涅耳原理解释，即波阵面上各点都可以看成是 子波源 ，其后波场中各点波的强度由各子波在该点的 相干叠加 决定。
2．讨论夫琅和费单缝衍射光强分布时，可采用 半波带法 和 振幅矢量叠加法 两种方法，这两种方法得到的单缝衍射暗纹位置都是一样的，暗纹位置x =a mf λ
±。
两相邻暗纹之间的距离定义为明纹
宽度，单缝衍射中央明纹宽度是其它各级明纹宽度的 2 倍。
3．单缝夫琅禾费衍射实验中，屏上第三级暗条纹所对应的单缝处波面可划分为 6 个半波带，若将缝宽缩小一半，原来第三级暗纹处将是 1级明 纹。
4．在单缝夫琅禾费衍射的观测中，单缝垂直于光轴的方向上下移动时，衍射图样 不产生 变化；透镜在垂直于光轴的方向上下移动时，衍射图样 产生 变化。
（以上选填： 产生或不产生）
5．在双缝衍射实验中，若保持双缝 S 1 和 S 2 的中心之间的距离为 d 不变，而把两条缝的宽度 a 略为加宽，则单缝衍射的中央明纹变 窄 ，其中所包含的干涉条纹数目变 少 。
6．光栅衍射主极大条件或光栅方程是λϕm d ±=sin ；光栅衍射主极大缺级的原因是 主极大的位置与单缝衍射暗纹的位置重合；同一级光栅光谱中，偏离中央明纹最远的是 红 光（填颜色）；光栅衍射主极大之间的暗区很宽的原因是 相邻主极大间有N-2个次极大，而次极大的亮度很小，当N 较大时，暗区将很宽。
综合练习题
1. 在单缝衍射实验中，入射光有两种波长的光，λ1=400nm ，λ2=760nm 。
已知单缝宽度 a =0.01cm ，透镜焦距 f =50cm 。
（1）求两种光第一级衍射明纹中心之间的距离； （2）若用光栅常数 d =0.001cm 的光栅替换单缝，其它条件和（1）中相同，求两种光第一级主极大之间的距离。
解：（1）由单缝衍射一级明纹条件λθ2
3sin =a 可知 34911100.610210400323sin ---⨯=⨯⨯⨯==a λθ ， 349
22104.1110
210760323sin ---⨯=⨯⨯⨯==a λθ 而1212tan tan θθf f x x x -=-=∆ mm f 7.210
4.5
5.0)sin (sin 312=⨯⨯=-≈-θθ
（2）由光栅衍射一级明纹条件λθ=sin d 可知 2591
1100.4100.110400sin ---⨯=⨯⨯=='d λθ ， 259
22106.7100.110760sin ---⨯=⨯⨯=='d λθ 而1212tan tan θθ'-'='-'='∆f f x x x cm f 8.1106.35.0)sin (sin 212=⨯⨯='-'≈-θθ
2. 在双缝衍射实验中，若每条缝宽 a =0.02(mm)，两缝中心间距 d =0.15(mm)，则在单缝衍射的两个第一极小条纹之间出现的干涉明条纹数为多少？
解：单缝衍射的第一级暗纹处对应的双缝干涉条纹的级次为
5.702.015.0===a d m
因为不存在7.5级，所以单缝衍射的两个第一极小之间（单缝衍射中央明纹区）出现的干涉明纹最大级次为7级，故在此区间共有 2⨯7+1=15条干涉明纹。
3. 波长λ=660nm 的单色光垂直入射到一光栅上，测得第二级主极大的衍射角2ϕ满足22.0sin 2=ϕ，且第三级是缺级，求：
（1）光栅常数d 等于多少?
（2）透光缝可能的最小宽度a 等于多少?
（3）在确定了的上述d 和a 之后，求屏上呈现出的全部主极大的级次。
解： （1）由λϕ2sin 2=d ，得m b a d μϕλ622.0/10
6602sin /292=⨯⨯==+=- （2）因为第3级主极大缺级，由缺级条件3='=
k a d k 得()2,13=''=k d k a ， 当1='k 时有a 最小值m d a μ23
1min ==
（1） 由09.910660100.696
=⨯⨯=<--λd
k m 可知屏上可能观察到最高级次为9max =k ， 又由缺级条件k k a
d k '='=3知9,6,3±±±级缺级，所以观察屏上能看到的全部级次为8,7,5,4,2,1,0±±±±±±级共13条谱线。