综合填空专项练习3,M2U1-2
2017届高一英语综合填空专项练习三
班级__________ 姓名__________
I. Complete the following sentences according to the Chinese given.
1. 吉姆似乎很难过。你知道他怎么了吗？
Jim seems to be very sad. Do you know what ____________________ him?
2. 从去年开始我就一直帮我的老师做教育研究工作。
Since last year I have been helping my teacher ____________________________ education.
3. 由于天气恶劣，火车可能会晚点一小时。
___________________ the bad weather, the train will probably arrive an hour late.
4. 地球看起来像一个球；同一时间太阳只能照到地球的一半。
The earth ___________________ a ball; the sun can shine on only half of it at a time.
5. 一队解放军战士来到了那座煤矿，奉命解救受困的矿工。
__________ the coal mine __________ a group of soldiers with orders to save the trapped miners.
6. 我们能从以上讨论中得出两个主要的结论。
We can __________ two main __________________ the above discussion.
7. 如果我不是亲眼看到他的表现，我永远都不相信这是真的。
If I hadn’t seen his performance _______________________, I would never have believed it true.
8. 上周日父亲提议我们都去野餐。
Last Sunday, Father __________________________ that we should all go for a picnic.
9. 在我看来，我的同龄人运动量不够。
People of my own age don’t get enough exercis e, __________________.
10. 参加这门课的人有机会学习另一门语言。
People who take the course _________________________________ learn another language.
1. 我等不及要看这位作家的新小说了。I ___________________ the writer’s latest novel.
2. 这一地区的很多小镇都值得一去。A lot of the small towns in the area ________________.
3. 当我们沿着那条河顺流而下时，我们被美丽的景色吸引了。
When we _________________________ that river, we were attracted by the beautiful scene.
4. 当我能够近距离看到他时，我发现他有双明亮的眼睛，头发是棕色的。
When I could see him ___________________, I saw that he had bright eyes and brown hair.
5. 我想我们已经讨论过这个问题了，但为了保险起见，我要再问你一次。
I guess we’ve already talked about this matter but I’ll ask you again just ___________________. II Fill in each blank with one proper word or the proper form of the given word.
Passage one
Society’s attitude towards health and fitness has changed over the past few years and we are much more aware of the need (1) ________(be) positive about our health and the importance of physical fitness (2) ________ ever before. We are encouraged to have a positive attitude to our health by taking better care of both our bodies and our minds ---- but (3) ________ does positive health and keeping fit really mean?
1
Positive health is not only about maintaining a minimum level of health and fitness to keep your body looking and feeling good, (4) ________ about maintaining a level of physical fitness (5) ________ will enable you (6) ________(manage) your daily life.
Health and fitness (7) ________ (determine) by what we eat, (8) ________ we live our lives and what we do to keep ourselves physically fit, whatever our lifestyle, age or physical ability is, we all need a certain amount of exercise to keep us healthy, (9) ________ is important for the following reasons :
Maintaining a good level of physical fitness will make us look (10) ________ (energy) and feel better about ourselves and about our life.
Passage two
Planet Earth is home to some great relics (遗迹) that seem to go beyond the technological capabilities (能力) of their time because they’re either too big (1)__________ too complex (复杂).
As such, some suggest the ancient (2)__________ (build) of the Egyptian pyramids were following an extraterrestrial (地球以外的) instruction handbook. Perhaps the hands that (3)__________ (work) at these sites weren’t really of this world.
Just outside Cairo, in Giza, one of the most famous pyramids in Egypt rises from the desert. But how, exactly, did the Egyptians build these things? The Great Pyramid (4)__________ (make) of millions of stones weighing about two tons each. Even (5)__________ today’s construction equipment, building a pyramid as big as that of Pharaoh Khufu would be a(n) (6)__________ (frighten) challenge.
Certainly, (7)__________ is fun to think about whether aliens have visited Earth. After all, we humans are trying to expand (扩展) our reach in space, and places like Mars are in our sight. But the truth is, there’s no evidence (8)__________ suggests aliens have ever been here. And giving a supernatural (9)__________ (explain) for some of the most monumental human achievements means skipping over the ways in which prehistoric people managed to make some of the largest and most (10)__________ (mystery) constructions on Earth.
Passage tthree
In 2007, DmitriyDey, an economist in Kazakhstan was scanning his country on Google Earth when he noticed large strange shapes and patterns. Years later, NASA (1)__________ (publish) some detailed photographs of these shapes in northern Kazakhstan, (2)__________ were called Steppe Geoglyphs.
“Geoglyph” is a term given to “land pictures”, where large shapes or patterns
(3)__________ (create) on the earth’s surface. Because of their size, they are best seen from
(4)__________. Most geoglyphs are made of sand and a few of wood. Geoglyphs have also been found in Peru, Russia, UK and the Middle East. The geoglyphs show a lot (5)__________ the societies that created them.
Some say the geoglyphs have existed for over 8000 years (6)__________ a Neolithic(新石器时代的) settlement was found nearby. Researchers think that this tribe (部落) could have constructed the geoglyphs, (7)__________ they’re not sure how these people stayed in one place long enough (8)__________ (do) so.
However, a research team from Kostanay University has used a different dating technique and estimated (估计) that the geoglyphs appeared around 800BC. While this team has continued their research, the geoglyphs are in danger of (9)__________ (wipe) out. Indeed, human activity such as road (10)__________ (construct) is a big threat.
2
Keys:
I.
1. happened to
2. do research on
3. Due to
4.looks like
5. To; came
6. draw; conclusions from
7. with my own eyes 8. made a suggestion
9. in my opinion 10. have the chance to
11. can’t wait to read 12. are worth visiting
13.traveled down 14. up close 15. in case
II.
Passage one
1. to be
2. than
3. what
4. but
5. which/that
6.to manage
7. is determined
8. how
9. which10. energetic
Passage two
1. or
2. builders
3. worked
4. is made
5. with
6. frightening
7. it
8. that/which
9. explanation 10. mysterious
Passage three
1. published
2. which
3. are created
4. above
5. about
6. since/because/as
7. although/though/but 8. to do
9. being wiped 10. construction
(完整版)高中英语语法填空专题训练和答案
语法填空专项训练 1 Before the 17th century, most of the native English speakers lived in England. After the 17th century, British people began to move to other ___66___ (country). Gradually, English was spoken there. At present ___67___ (many) people speak English as their first, second or a foreign language than ever before. ___68___ (luck), native English speakers can understand each other even if they don’t speak the same kind of English. English ___69___ (change) and developed when cultures met and communicated with each other over the past centuries. The English ___70___ (speak) in England between about AD450 and 1150 was very different ___71___ the modern English we speak today. It was the new settlers that enriched the English language and ___72___ (especial) its vocabulary. The English language was settled by the 19th century ___73___ two big changes in English spelling happened. English now is also spoken as a foreign ___74___second language in South Asia. China may have the ___75___ (large) number of English learners. 66.【答案】countries 【解析】考查名词。country是可数名词，此处由other修饰用复数形式，指其他的国家。故填countries. 67. 【答案】more 【解析】考查比较级。根据句中的than ever before可知含有和以前比较的意思，要用比较级表示更多的人，故填more. 68. 【答案】Luckily 【解析】考查副词。此处单独使用作状语要用副词形式，指“幸运的是”，故填Luckily. 69. 【答案】has changed 【解析】考查时态。根据句意和时间状语over the past centuries可知与现在完成时连用，主语是单数，故填has changed. 70. 【答案】spoken 【解析】考查过去分词。English和动词speak是被动关系，此处是过去分词作定语，故填spoken.
(完整word版)高三理科数学选择题填空题专项训练
高三理科数学限时训练 一、选择题(本大题共10小题,每题5分,共50分.每题都给出四个结论，其中有且只有一个 结论是正确的.) 1. 复数z 满足(2)z z i =+，则z =（ ） A ．1i + B ．1i - C ．1i -+ D ．1i -- 2. 已知实数a ≠0，函数2,1()2,1x a x f x x a x +
小学四年级语文上册填空题专项综合练习
小学四年级语文上册填空题专项综合练习 1. 给加下划线的多音字选择正确读音。 （1）jiǎ|jià 暑假______ 假装______ 假日______ （2）jī jǐ 几乎______ 几时______ 窗明几净______ （3）zhōng zhòng 中奖______ 中华______ 中毒______ （4）chǔ chù 到处______ 处分______ 处罚______ 2. 在横线上填上恰当的词语。 ______的大海______的翡翠______的香山______的画卷 ______的西湖______的泰山______的屏障______的漓江 3. 给加下划线的字注音，根据拼音写出汉字。 乍暖还寒时分，在小河边，在石缝中，迎春花一丛丛，一簇簇地冒出了嫩绿色的新叶长出了灿烂的小花。她不屑______于北风的凌辱，执着地，qiè______而不舍地开放，用她不经意的绽放，璀càn______着整个早春…… 4. 请你用“静”字组成的词语填空。 ①夜晚的乡村______而安详。 ②自习课上，教室里非常______。 ③我们的教室非常______。 ④小红大哭了一场，心情慢慢地______下来。 5. 读拼音，写字词。 ①晚上，因为没人陪弟弟玩shuǎ______，他打了两个哈qian______后，便shuì______着了。 ②我xǐ______欢观chá______花儿慢慢shèng______开的样子，看着它们不断变化，真有qù______！ 6. 根据课文内容补充词语，再照样子写一个，并造个句子。 ①懒______ ______溜溜 造句：______；______。 ②______摇摇 ______辈辈 造句：______；______。 7. 在横线上填上恰当的词语。
平行四边形综合提高练习题
F E D C B A 平行四边形综合提高 一利用平行四边形的性质进行角度、线段的计算 1、如图，在□ABCD中，AE⊥BC于E，AF⊥CD于F，若∠EAF＝60o，则∠B＝_______； 若BC＝4cm，AB＝3cm，则AF＝___________，□ABCD的面积为_________． 2已知ABCD的周长为32cm,对角线AC、BD交于点O，△AOB的周长比△BOC的周长多4cm，求这个四边形的各边长。 二、利用平行四边形的性质证线段相等 3、如图，在□ABCD中，O是对角线AC、BD的交点，BE⊥AC，DF⊥AC，垂足分别为E、F．那 么OE与OF是否相等为什么 三直接利用平行四边形的判定和性质 4、如图在ABCD中，E、F分别是AD、BC的中点，AF与EB交于点G，CE与DF交于点H，试 说明四边形EGFH的形状。 5、如图，BD是ABCD的对角线，AE⊥BD于E，CF⊥BD于点F，求证：四边形AECF为平行四 边形。 四构造平行四边形解题 6、如图2-33所示．Rt△ABC中，∠BAC=90°，AD⊥BC于D，BG平分∠ABC，EF∥BC且交AC 于F． 求证：AE=CF． H G A B D C E A B D C E F
7、已知，如图，AD为△ABC的中线，E为AC上一点，连结BE交AD于点F，且AE=FE，求证：BF=AC [能力提高] 1、如图2-39所示．在平行四边形ABCD中，△ABE和△BCF都是等边三角形． 求证：△DEF是等边三角形． 2、如图2-32所示．在ABCD中，AE⊥BC，CF⊥AD，DN=BM．求证：EF与MN互相平分． 3、如图2-34所示．ABCD中，DE⊥AB于E，BM=MC=DC．求证：∠EMC=3 ∠BEM． 4 如图2-35所示．矩形ABCD中，CE⊥BD于E，AF平分∠BAD交EC延长线于F．求证：CA=CF． [创新思维] 1、以△ABC的三条边为边在BC的同侧作等边△ABP、等边△ACQ、等边△BCR， 求证：四边形PAQR为平行四边形。F B C E D
语法填空专项练习(附答案)
语法填空专练（一） ___1___ being Sunday, I decided to sleep late. But it wasn’t long ___2___ I realized that I had to go to the bookstore to get a reference book our teacher had asked us to buy. ___3___ (fear) they would be sold out before I got one, I got up and headed for the bookstore. It was three blocks away, and pretty soon I reached ___4___ shop. It was not until I entered the shop that it came to my ___5___ that I forgot to bring any money on me. This meant I ___6___ do nothing but return home for the money. ___7___, I ran all the way home to fetch the money. After a while, I returned to the shop and bought the book that I wanted. Reading the pages of it, I ___8___ (feel) it my duty to do well in my studies, and I was sure I could make it. There will be a few months before I take the College Entrance Examination, and I‘ll work still ___9___ (hard) at my lessons. Though there may be difficulties for me, I’m confident that I can achieve my aim and make it into college. I owe it to my parents ___10___ they’ve do ne so much for me, so that I can concentrate on my studies. （专练二） “Fire！Fire！”What terrible words to hear when one wakes up in a strange house in the middle of the night! It was a large, old, wooden house and my room was on the top floor. I jumped out of the ___1___, opened the door and stepped outside the house. There was ___2___ of thick smoke. I began to run, but as I was still only half-awake, instead of going towards the stairs, I went in the opposite direction. The smoke grew ___3___ (thick) and I could see fire all around. The floor became hot under my bare feet. I found an open door and ran into a room to get to the window. But ___4___ I could reach it, one of my
初三数学一模填空选择专项练习
一、选择题：（本大题共6题，每题4分，满分24分） 1．二次函数1)1(2 -+=x y 图象的顶点坐标是 A ．（1，1）； B ．（1，-1）； C ．（-1，1）； D ．（-1，-1）． 2．已知Rt △ABC 中，∠C =90o,那么 b c 是∠B 的 A ．正切； B ．余切； C ．正弦； D ．余弦． 3．已知线段a 、b ，且 3 2 =b a ，那么下列说法错误的是 A ．a ＝2cm ，b ＝3cm ； B ． a ＝2 k ，b ＝3 k (k >0)； C ．3a ＝2b ； D ．b a 3 2 =． 4．下列语句错误的是 A ．如果0=k 或0a =，那么0=a k ρ ； B ．如果m 、n 为实数，那么a mn a n m )()(=； C ．如果m 、n 为实数，那么n m n m +=+)(； D ．如果m 、n 为实数，那么m m m +=+)(． 5．如果点D 、E 分别在△ABC 边AB 、AC 的反向延长线上，一定能推出DE ∥BC 的条件是 A ． AC AE BC DE = ； B ．AC AD AB AE =； C ．AE AC AD AB =； D ．BD AD CE AC = ． 6．下列图形中一定相似的一组是 A ．邻边对应成比例的两个平行四边形； B ．有一个内角相等的两个菱形； C ．腰长对应成比例的两个等腰三角形； D ．有一条边相等的两个矩形． 二、填空题：（本大题共12题，每题4分，满分48分） 7．已知 31=y x ，那么y x x += ▲ ． 8．计算：?-?30cot 60sin = ▲ ． 9．上海与南京的实际距离约350千米，在比例尺为1：5 000 000的地图上，上海与南京的 图上距离约 ▲ 厘米． 10．一斜面的坡度75.0:1=i ，一物体由斜面底部沿斜面向前推了10米， 那么这个物体升高了 ▲ 米． 11．请写出一个开口向上，且经过点（0，-1）的抛物线解析式： ▲ （只需写一个）． 12．已知抛物线122 -+-=x x y ，它的图像在对称轴 ▲ （填“左侧”或“右侧”）的 部分是下降的． 13．若抛物线92 +-=bx x y 的对称轴是y 轴，那么b 的值为 ▲ . A 1 D B 第17题图
英语综合填空专项训练及答案一
一、故事类 1 Henry works in factory. He comes from a p________ family and was in school for only four years. He has to do the hard work, but he?s paid l________. He likes to watch football m________ very much and spends much time on it. One evening there was a big football match on a playground. He borrowed some m________ from his friend and hurried there. There were a lot of people there. And all the tickets were sold o________. He was sorry for it. He saw a pole (电线杆) outside the playground and climbed it up q________. A policeman came and said, “It?s d________ to stay on it! Come down!” “Wait a minute, please!” Henry said and just at that moment the policeman heard cheers (欢呼声) in the playground and asked in a h________, “Which team has kicked a goal?”“Ours!”“Wonderful! Y ou can s________ there. But take care!” the policeman said happily and left. When the match would soon be over, he came back again and asked, “Who?s won?”“Theirs, 3-2.”“Come down,” the policeman said angrily, “Such a match isn?t worth w________!” Henry had to come down. But soon they heard cheers again. The policeman said in a hurry, “Climb up quickly and see who?s kicked a goal!” 2 When Martin was a small boy, he lived in the little town of Holtham. Then, he thought the town was a big p________. Well, Martin went back to Holtham last week. “It?s a small town!” he thought. Holtham has changed l________ during the past forty years. B________ Martin has changed a lot. He has g________ into a man. He is now in m________ life. His thoughts are a man?s thoughts, and he sees things through a m________ eyes. Martin s________ in Holtham for five hours. He walked from street t________ street. He could see no friends. Was Holtham, then, a town of strangers? No. Martin suddenly u________ it all. Only he h________ was a stranger in the town. 3 One day, Allan and his friend Henry went swimming in a river. It was very hot. How h________ they were in the river! After they got out of the w________, they played games in the sun for a while. On their w________ back, Henry saw some flowers. He liked flowers very much and ran into the green f________ to look at them. Now Allan was walking by h________. Then he heard Henry calling out, “A snake! Help!” “What?s wrong with you?” asked Allan. “A snake bit (咬) me in the leg. Come here!” Allan ran o________ and saw a small red wound (伤口) on Henry?s leg. “The snake was in the grass. I didn?t see it.” “Sit down q________!” Allan told Henry. Allan put his mouth at the little red wound and began to suck (吸) at it. In this way he saved Henry?s l________. “Oh, Allan, it?s very k________ of you to help me.” “That?s all right. We are friends and we must always h________ each other.”
语法填空专项练习(附答案)
语法填空专项练习(附答案) ___1___ being Sunday, I decided to sleep late. But it wasn’t long ___2___ I realized that I had to go to the bookstore to get a reference book our teacher had asked us to buy. ___3___ (fear) they would be sold out before I got one, I got up and headed for the bookstore. It was three blocks away, and pretty soon I reached ___4___ shop. It was not until I entered the shop that it came to my ___5___ that I forgot to bring any money on me. This meant I ___6___ do nothing but return home for the money. ___7___, I ran all the way home to fetch the money. After a while, I returned to the shop and bought the book that I wanted. Reading the pages of it, I ___8___ (feel) it my duty to do well in my studies, and I was sure I could make it. Ther e will be a few months before I take the College Entrance Examination, and I‘ll work still ___9___ (hard) at my lessons. Though there may be difficulties for me, I’m confident that I can achieve my aim and make it into college. I owe it to my parents ___10___ they’ve done so much for me, so that I can concentrate on my studies. （专练二） “Fire！Fire！”What terrible words to hear when one wakes up in a strange house in the middle of the night! It was a large, old, wooden house and my room was on the top floor. I jumped out of the ___1___, opened the door and stepped outside the house. There was ___2___ of thick smoke. I began to run, but as I was still only half-awake, instead of going towards the stairs, I went in the opposite direction. The smoke grew ___3___ (thick) and I could see fire all around. The floor became hot under my bare feet. I found an open door and ran into a room to get to the window. But ___4___ I could reach it, one of my feet caught in something soft and I fell ___5___. The thing I had fallen over felt like a bundle of clothes, and I picked it up ___6___(protect) my face from the smoke and heat. I crashed to the floor below with pieces of ___7___ (burn) wood all around me. As I reached the cold air outside, the bundle of clothes gave a thin cry. I nearly dropped ___8___ in surprise. Then I was in a crowd gathered in the street. A woman ___9___ a night dress and a borrowed man’s coat screamed as she saw me and came running ___10___ (mad). She was the Mayor’s wife, and I had saved her baby. （专练三） So the main reason why people ____10____ dogs has changed from protection to friendship. （专练四） Student: Excuse me, can you spare a few minutes to answer some questions? Woman: Umm, yes, I suppose ____1_____. What’s it for? Student: I ____2_____ (do) a survey about people’s shopping habits. Woman: Oh, all right then. Student: Great. Do you usually shop alone or with ____3_____ else in your family? Woman: Oh, I always do it on my ____4____. If I go with the others, they always put too many things in the trolley (推车) and it costs me ____5____ fortune!
初中英语动词时态选择及填空专项练习(附答案)
初中英语动词时态选择及填空专项练习(附答案)
初中英语动词时态专项练习题 用括号中动词的适当的形式填空。 1．The boy is happy because he ___________(sell) out all the newspapers. 2．The plan _____________(give) up because of rain. 3．If it __________(not rain) tomorrow, we ____________(go )fishing. 4．Where ____________you____________(be) these days? 5．Where is Tom? He _________(go) to the post office. He said he _________(come) back soon. 6．Mike says he _________(want )to be a worker after he _________ (finish )school. 7．The last bus ____________just ________(leave) when they ________(get) to the bus stop. 8．She _________(not go) to bed until she _______(finish) her work. 9．Light ___________(travel )much faster than sound. 10．I __________(feel) much better after I _______(take) the medicine. 11．”Where ________we________(meet)?” “Let’s meet outside the park gate.” 12．I_________(be) afraid Mr Johnson __________(not visit) out school tomorrow. 13．I _________(lost) my bike ._________you _________(see) it anywhere? 14．________this kind of car __________(produce) in Shanghai?
中考英语综合填空题专项训练
中考英语综合填空题专项训练05.附详解 根据上下文和括号里的汉语提示，在下面的空白处写出正确的单词和短语，使短文意思完整。 Most of American businesses are open five days a week. American school children attend school five days a week as well. American families usually have a （1）______（两天） weekend. The weekend is Saturday and Sunday. Over the weekend people spend their time （2）______（以许多不同的方式）。 Many families enjoy weekends （3）______（一起）。 They may go shopping， go for a drive or visit friends. They may also invite friends over and （4）______（聚会） at home. Many American families participate （参加） in sports during the weekend. （5）______（跑步）， biking， playing volleyball and swimming （6）______ （流行） in summer. Skiing and skating are the （7）______ （最喜爱的） winter sports. Weekends are also a time for American families to work on something in their yards or in （8）______（他们的） houses. Many families plant flowers and have vegetable gardens. Some families use the weekends （9）______（粉刷） or repair their houses. （10）______（对大部分美国人来说）， weekends are very busy. 「答案与解析」 本文讲述美国人是如何过周末的情况。
语法填空专题训练(含答案)
语法填空专题训练 Combined by Stella A Making new friends means 1_________(put) yourself out on a limb and asking others not only to accept you, but to like you and want to be around you as well. Unfortunately, there is no 2__________(magic) solution 3__________ this part of the process, so if you want to make friends, take a deep breath and jump right in! 4__________ first step to making new friends is figuring out what is holding you back. A lot of times people 5__________ are interested in making new friends don’t know why they don’t have them. They can’t see that 6__________ won actions are working against them. Once you can identify(确认，确定)what is keeping you from making new friends, you need to work through these concerns. This can be 7__________(pain) because you will need to put yourself outside of your comfort zones to see any real differences. The next step is to shine in these social settings so that others will leave with a positive impression. If you find social situations hard, just rely on a few simple rules. When you feel 8__________(confidence) that you’ve made some great new friends, get out there and celebrate with them! No matter 9__________ you decide to do, the important thing is to celebrate your new friends 10__________ hopefully continue cultivating more. B For your next vacation, why not think of 1__________(visit) Singapore? Singapore is a small city, and it doesn’t have nay beaches 2__________ mountains, but is has a very large zoo. It is also a 3__________(wonder) place for shopping. Don’t plan on driving a car in Singapore. The traffic 4__________(be) heavy in some parts of the city, and most private cars are not 5__________(allow) in downtown Singapore. 6_______ is easiest to get around the city 7_______ subway.
(完整)高中数学选择填空题专项训练
综合小测1 一、选择题 1.函数y =2x +1的图象是 2.△ABC 中，cos A = 135，sin B =53 ,则cos C 的值为 A. 65 56 B.－6556 C.－6516 D. 65 16 3.过点（1，3）作直线l ，若l 经过点（a ,0）和(0,b )，且a ,b ∈N*，则可作出的l 的条数为 A.1 B.2 C.3 D.多于3 4.函数f (x )=log a x (a ＞0且a ≠1)对任意正实数x ,y 都有 A.f (x ·y )=f (x )·f (y ) B.f (x ·y )=f (x )+f (y ) C.f (x +y )=f (x )·f (y ) D.f (x +y )=f (x )+f (y ) 5.已知二面角α—l —β的大小为60°，b 和c 是两条异面直线，则在下列四个条件中，能使b 和c 所成的角为60°的是 A.b ∥α,c ∥β B.b ∥α,c ⊥β C.b ⊥α,c ⊥β D.b ⊥α,c ∥β 6.一个等差数列共n 项，其和为90，这个数列的前10项的和为25，后10项的和为75，则项数n 为 （ ） A.14 B.16 C.18 D.20 7.某城市的街道如图，某人要从A 地前往B 地，则路程最短的走法有 A.8种 B.10种 C.12种 D.32种 8.若a ,b 是异面直线，a ?α,b ?β,α∩β=l ，则下列命题中是真命题的为 A.l 与a 、b 分别相交 B.l 与a 、b 都不相交 C.l 至多与a 、b 中的一条相交 D.l 至少与a 、b 中的一条相交
9.设F 1，F 2是双曲线4 2 x －y 2=1的两个焦点，点P 在双曲线上，且1 PF ·2PF =0，则|1 PF |·|2PF |的值等于 A.2 B.22 C.4 D.8 10.f (x )=(1+2x )m +(1+3x )n (m ,n ∈N*)的展开式中x 的系数为13，则x 2的系数为 A.31 B.40 C.31或40 D.71或80 11.从装有4粒大小、形状相同，颜色不同的玻璃球的瓶中，随意一次倒出若干粒玻璃球（至少一粒），则倒出奇数粒玻璃球的概率比倒出偶数粒玻璃球的概率 A.小 B.大 C.相等 D.大小不能确定 12.如右图，A 、B 、C 、D 是某煤矿的四个采煤点，l 是公路，图中所标线段为道路，ABQP 、BCRQ 、CDSR 近似于正方形.已知A 、B 、C 、D 四个采煤点每天的采煤量之比约为5∶1∶2∶3，运煤的费用与运煤的路程、所运煤的重量都成正比.现要从P 、Q 、R 、S 中选出一处设立一个运煤中转站，使四个采煤点的煤运到中转站的费用最少，则地点应选在 A.P 点 B.Q 点 C.R 点 D.S 点 题号 1 2 3 4 5 6 7 8 9 10 11 答案 二、填空题 13.抛物线y 2=2x 上到直线x －y +3=0距离最短的点的坐标为_________. 14.一个长方体共一顶点的三个面的面积分别是2，3，6，这个长方体对角线的长是_________. 15.设定义在R 上的偶函数f (x )满足f (x +1)+f (x )=1,且当x ∈［1,2］时，f (x )=2－x ,则f (8.5)=_________.
(完整word)四边形综合提高练习题
四边形综合提高练习题 1、十二边形的内角和为（ ） A.1080° B.1360° C 、1620° D 、1800° 2、能判定四边形ABCD 为平行四边形的题设是（ ）． （A ）AB ∥CD ，AD=BC; （B ）∠A=∠B ，∠C=∠D; （C ）AB=CD ，AD=BC; （D ）AB=AD ，CB=CD (D) 3、菱形ABCD 的对角线长分别为6cm 和8cm ，则菱形的面积为（ ） A.12， B.24 C.36 D.48 4．下列说法不正确的是（ ） （A ）对角线相等且互相平分的四边形是矩形;（B ）对角线互相垂直平分的四边形是菱形; （C ）对角线垂直的菱形是正方形;（D ）底边上的两角相等的梯形是等腰梯形 5、如图1，在平行四边形ABCD 中，CE AB ⊥，E 为垂足．如果 125A =o ∠，则BCE =∠（ ） Ａ．55o Ｂ．35o Ｃ．25o Ｄ．30o 6、顺次连结任意四边形各边中点所得到的四边形一定是__ ___． 7、如图4 ，把一张矩形纸片ABCD 沿EF 折叠后，点C D ，分别落在C D ''，的位置上，EC '交AD 于点G ．则△EFG 形状为 8、如图5，在梯形ABCD 中，AD BC ∥，419045==?=∠?=∠BC AD C B ，，， 则AB= 9．如图6，AC 是正方形ABCD 的对角线，AE 平分∠BAC ，EF ⊥AC 交AC 于点F ，若BE=2，则CF 长为 1．如图，在Rt △ABC 中，∠B=90°，BC=53，∠C=30°．点D 从点C 出发沿CA 方向以每秒2个单位长的速度向点A 匀速运动，同时点E 从点A 出发沿AB 方向以每秒1个单位长的速度向点B 匀速运动，当其中一个点到达终点时，另一个点也随之停止运动．设点D 、E 运动的时间是t 秒（t ＞0）．过点D 作DF ⊥BC 于点F ，连接DE 、EF ． （1）求AB,AC 的长；（2）求证：AE=DF ； （3）四边形AEFD 能够成为菱形吗？如果能，求出相应的t 值；如果不能，说明理由． （4）当t 为何值时，△DEF 为直角三角形？请说明理由. 2．如图，已知菱形ABCD 的对角线AC 、BD 相交于点O ，延长AB 至点E ，使BE =AB ，连接CE ． （1）求证：四边形BECD 是平行四边形； （2）若∠E =60°，AC =43,求菱形ABCD 的面积． 3．在△ABC 中，AB ＝AC ＝2，∠BAC ＝45o.△AEF 是由△ABC 绕点A 按逆时针方向旋转得到，连接BE ，CF 相交于点D . （1）求证：BE ＝CF ； （2）当四边形ABDF 是菱形时，求CD 的长. 4．如图，四边形ABCD 是正方形，点E ，F 分别在BC ，AB 上，点M 在BA 的延长线上，且CE=BF=AM ，过点M ，E 分别作NM ⊥DM ，NE ⊥DE 交于N ，连接NF ． （1）求证：DE ⊥DM ； （2）猜想并写出四边形CENF 是怎样的特殊四边形，并证明你的猜想．