武汉外国语学校七年级下期中考试试卷
湖北省武汉外校下学期期中考试七年级英语试题(无答案,无听力部分)
2016-2017学年度下学期期中考试七年级英语试题II. Multiple Choice. (1×15’)26. —I came first in the long jump.—______. I’m so proud of you.A. Good luckB. Have funC. Well doneD. You’re joking27. —Daddy, can you come home for supper with us this weekend?—______, but I might be a little late.A. I’m busyB. Hard to sayC. Of courseD. Never mind28. Look! The boy ______ blue jeans ______ a bicycle.A. in; is ridingB. in; rideC. on; ridingD. on; is riding29. How many ______ are there in the box?A. packets of sweetB. packet of sweetC. packet of sweetsD. packets of sweets30. —Can I have 450 grams of cheese?—I’m sorry, but there ______ cheese.A. isn’t anyB. aren’t anyC. isn’t someD. aren’t some31. Miss Grey always ______ her car to school, but now she ______ to school.A. drive; walkB. drives; walksC. is driving; is walkingD. drives; is walking32. The International Convention Centre is the ______ for a three-day arts festival.A. ceremonyB. venueC. restaurantD. graveyard33. —What if I tell the host family about the food problem?—You’d better not. You will appear as a _____ person.A. fussyB. unhealthyC. horribleD. friendly34. —What would you like to eat, sir?—Just a minute. Let me see what is on the ______ today first.A. orderB. listC. menuD. bill35. —That is ______, and we cannot be sure about changes in the future.—Yes, I can’t help worrying about it.A. excitingB. fancyC. scaryD. interesting36. Their daily diet consists of a ______ of bread, a ______ of rice and water.A. slice; bowlB. bar; pieceC. bunch; glassD. slice; cup37. —Shall we meet at the school gate at 9 o’clock ______ Saturday morning?—Fine. See you then.A. inB. onC. atD. /38. —______ do you eat take-away food?—About 3 times a week.A. WhenB. How manyC. How oftenD. What date39. In the US, we have a tradition that when you ______ the candles on your birthday cake, you should make a wish.A. turn offB. take offC. put outD. blow out40. The company ______ some coffee ______ the guests every morning, but sometimes they turn it down.A. offers; forB. provides; withC. offers; toD. provides; toIII. Close Test (1’×10)These days, many people enjoy riding bikes. But there is a lot to 41 before you buy a bike. There are many kinds of bikes. That’s why it is often good to ask a(n) 42 before you buy a bike.Different bikes are made to do different things. If you want a bike, you need to get the right kind of bike. First, ask 43 where you plan to ride it. On city streets? On mountain roads? Or both? When you decide, you can 44 the bike for your needs. Next, be sure you get the right 45 of bike for you. Professional bike stores will take time to measure (量…...的尺寸大小) you. Then they will put the measurements 46 a computer. The computer will tell you a good size.You 47 need to choose other things like handlebars (把手) and a seat. And finally, you need to know 48 to ride the bike. You need to sit in a right way. You should be 49 when you ride the bike. A professional in a bike store can 50 you with these things. Then you will be ready to hit the road.41. A. think about B. hear from C. fall down D. make up42. A. teenager B. cook C. expert D. teacher43. A. myself B. yourself C. himself D. herself44. A. forget B. send C. bring D. choose45. A. size B. price C. service D. guide46. A. for B. of C. in D. as47. A. again B. also C. once D. already48. A. how B. why C. when D. where49. A. small B. angry C. traditional D. comfortable50. A. trust B. help C. mix D. useIV. Reading Comprehension.(2’x15)51. What does Jan Lee want to do?A. To paint the art room.B. To start a science fair.C. To visit Mr. Wayne’s class.D. To take care of the school’s garden.52.Which of the following is TRUE according to the material?A. Mr. King needs some yarn.B. School will be closed on March 16.C. There was a singing competition in Mr. Wayne’s class.D. Mrs. Mohan’s class will go to North Park Zoo by bike.53. This material is probably from ______.A. a guidebookB. a school notice boardC. a storybookD. an education magazineBThe best thing for me is my dog, Jasper. He’s a black Labrador and he’s great. I got him when I was nine. And we’ve grown up together. My uncle gave him to me for my ninth birthday. He is very cute.Ben There are lots of things I like that don’t cost anything. Let’s see….sunsets. My house is on a hill, and in the evening, there’s sometimes a beautiful sunset. It makes washing the dishes more interesting! I also love getting cards from my family. But the best thing is my son. He’s the most beautiful baby boy I’ve ever seen!MaryI think the best thing for me is playing with my little sister. Abby. She’s almost four, and I’m much older than her. I’ve also got a brother, Dominic. He’s six. But he doesn’t like the games I like, so he isn’t as much fun to play with. Abby’s always waiting for me when I come home from school. She thinks I’m the best person in the world.Laura54. Who gave Ben a dog for his 9th birthday?A. His mother.B. His father.C. His aunt.D. His uncle.55. What can we know about Mary?A. She has a lovely baby daughter.B. She enjoys a beautiful sunset every day.C. She enjoys getting cards from her family.D. She hardly ever washes the dishes at home.56. Laura thinks playing with her sister is _______.A. tiringB. interestingC. boringD. relaxingCHi Sophie,How are you? I’m fine. I hope you’re OK as well. The weather in London is great, and I’m living in a really cosy (舒适的) house with people from different countries. My best friend is called Izabela. She’s Polish and she came here five years ago. She’s a really nice person. Whenever I have a problem, she’s always there to help me. From time to time, we go out to the cinema or watch or watch a DVD together. At first, there was a bit of friction over cleaning the house. It was my fault (过错). You know, I really hate doing housework! Anyway, we solved that problem and we now get along fine. I really enjoy spending time with her. She is such a warm-hearted person.I have made a lot of friends here. In the evenings I often have people round for a meal and I like to cook them Korean food. Last night I cooked Korean noodles for some Italian friends, it was so spicy (辣的) for them that they almost cried; it was really funny! After dinner, we had aheart-to- heart talk about our dreams. It was quite an enjoyable night! I’ve also met a lovely South African man called Munyani. We sometimes go out to a library or a museum; we have a great time together. Some of my friends are going back to their countries soon, and we’ll keep in touch by email.Next month I’m going on holiday to Italy with a Japanese friend. I’ll tell you all about it when I’m back in Korea. I can’t wait to see you. I miss you so much.All for now-write back soon!57. From the letter, we can know that Izabela ______.A. is nice and helpfulB. is one of Jina’s classmatesC. went to Poland five years agoD. hated watching movies before58. What does the underlined word “friction” mean in Chinese?A. 培训B. 研究C. 摩擦D. 沟通59. How did Jina feel last night?A. Bored.B. Happy.C. Shocked.D. Luckily.60. What does Jina mainly talk about in the letter?A. What her life is like in London.B. Why she loves to stay in London.C. How she gets on with her roommates.D. What her plan is for the coming holiday.DA traveler was once staying in a village of another country. One day, she held up her camera to take pictures of the children at play. Suddenly the young ones began to shout.The traveler’s face turned red and she said sorry to the head for what she was doing, and told him she had forgotten that people in some places thought a person would lose his soul (灵魂) if his picture was taken. She explained (解释) to him the operation of a camera for a long time. Several times the head tried to say something, but he couldn’t.When she was sure she had put the head’s fear (害怕) to rest, the traveler then let him speak. With a smile, he said, “The children were trying to tell you that you forgot to take off the cap (镜头盖)!”61. The children shouted when the traveler was taking pictures of them because ______.A. they didn’t want the traveler to take any picturesB. the traveler was not doing well with her cameraC. the traveler would take their souls at onceD. the traveler forgot to take off the cap from her head62. The traveler said sorry to the head because ______.A. she had stayed in the village too longB. the children thought they would lose their camerasC. she thought the children were afraid of being taken photosD. she didn’t take a picture of the head first63. The traveler explained how to use a camera to the head because ______.A. the head wanted to learn how to take picturesB. She was afraid of the headC. She wanted the head not to worry about what she was doingD. The head was very interested in her camera64. When the head smiled, it was clear that ______.A. the traveler didn’t let him speakB. the children wanted to play with herC. he wanted the traveler to tell him the truthD. the traveler didn’t know what the children meant65. Which of the following is NOT true?A. The children wouldn’t mind if the traveler took pictures of them.B. The tra veler didn’t understand why the children shouted at first.C. The traveler knew something about people in some countries.D. The head was afraid that the traveler took pictures of the children at play.Part Two (共40分)V. Spot Dictation. (1’×5)Mario Green and Mary Brown from Riverside High School (66) several hours each week to help others.Mario loves animals and wants to be an animal (67). He volunteers at an animal hospital every Saturday morning. Mario believes it can help him to get his (68) dream job. “it’s hard work,” he says, “but I want to learn more about how to care for animals. I get such a strong (69) of satisfaction when I see the animals get better and the look of joy on their owners faces.”Marie is a book lover, she could read by herself at the age of four. Last year, she decided to try out for a volunteer after-school reading program. She still works there once a week to help kids learn to read. “The kids are sitting in the library, but you can see it in their eyes they’re going on a different journey with each new book. (70) here is a dream come true for me. I can do what ii love to do and help others at the same time.”66. ______ 67. _______ 68. ______ 69. _______ 70. _______VI. Match the words with their definitions. (1’×5)( ) 71. treatment A. the subject matter of a conversation or discussion( ) 72. telescope B. allowing different choices( ) 73. alternative C. a person related by blood or marriage( ) 74. theme D. medical attention given to a sick or injured person or animal( ) 75. relative E. an instrument with lenses that makes distant things larger and nearer when you look throughVII. Fill in the blanks according to the texts. (1’×5)76. —Let’s take the ______ off the wheel.—Put the tube in this basin, Sandy.77. Now they’re eating sandwiches, cakes and ______. They’re drinking lemonade, too.78. Inside the hotel, there are two bedrooms, and a dining room for the ______.79. However, most ______ eat eggs, cheese and other dairy products, but vegans don’t.80. However, most doctors believe that fruitarians do not have a ______ diet.VIII. Fill in the blanks with the correct forms of the words given. (1’×10)81. —I am crazy about chocolate.—You’d better eat less. As we all know, chocolate is ______ (rat).82. The Prime Minister of UK, has accepted an ______ (invite) to visit the White House in June.83. Look! The boys ______ (clean) their classroom. Let’s clean ______ (we).84. The first train ______ (leave) for London at 5 a.m. every day in Winter.85. Le t’s ______ (stop) talking about the holiday and get down to study right now.86. —He has a (an) ______ (health) diet and he doesn’t exercise at all.—That’s why he is fat.87. Every December, our family go to Oxford Street to buy some gifts and some Christmas. (decorate)88. That couple always holds a little ______ (celebrate) every year on their wedding anniversary.89. They might look ______ (taste) but you probably wouldn’t want one of these on your toast in the morning.IX. Complete the sentences with correct words. The first letters have been given to you. (1’×5) 90. —Some children find it difficult to talk to a______.—I think children and their parents need a good way to communicate and know each other.91. If a couple has got everything when they get m_____, what should they expect in the future?92. It’s still p_____ for her to talk about the terrible accident. It is very difficult and unpleasant for her.93. If you are lucky to have a f______ ticket for the theater, you can enjoy the play without paying for it.94. I’m totally c______ Could you explain that again?X. Sentence Patterns. (1’×10)95. There are some spoons on the table. (Change the sentences into interrogatives)96. I’d like some bread and juice for breakfast. (Change the sentences into interrogatives)97. Close the windows when you leave the classroom. (Change the sentences into interrogatives)98. There is going to be football match next week. (Change the sentences into interrogatives)99. Jenny usually spends ￡80 at weekends. (Ask a question to the underlined part)100. James and Rosie are both from Ireland. (Ask a question to the underlined part)101. He shouldn’t 101. He shouldn’t excise too much. (Ask a question to the underlined part) 102. I can see a boy. He is playing basketball in the playground. (Join the two into one)103. Why not discover what you enjoy and do that? (Say it in another way)104. Bring me an old shirt to protect my clothes. (Say it in another way)。
2020-2021学年湖北省武汉外国语学校七年级(下)期中数学试卷
2020-2021学年湖北省武汉外国语学校七年级（下）期中数学试卷一、选择题（每题3分，共30分）1．（3分）下列各式中正确的是（）A．＝±2 B．＝4 C．＝﹣3 D．＝42．（3分）把方程2x﹣y＝3改写成用含x的式子表示y的形式正确的是（）A．2x＝y+3 B．x＝C．y＝2x﹣3 D．y＝3﹣2x3．（3分）将点A（﹣4，﹣1）向右平移2个单位长度，再向上平移3个单位长度得点A′，则点A′的坐标是（）A．（2，2）B．（﹣2，2）C．（﹣2，﹣2）D．（2，﹣2）4．（3分）如果点A（a、b）在第三象限，则点B（﹣a+1，3b﹣5）关于原点的对称点是（）A．第一象限B．第二象限C．第三象限D．第四象限5．（3分）如图，直线AB∥CD∥EF，且∠B＝40°，∠C＝125°，则∠CGB＝（）A．10°B．15°C．20°D．25°6．（3分）如图，已知AB∥CD，∠1＝55°，∠2＝45°，点G为∠BED内一点，∠BEG：∠DEG＝2：3，EF平分∠BED，则∠GEF＝（）A．18°B．15°C．12°D．10°7．（3分）a、b是两个给定的整数，某同学分别计算当x＝﹣1，1，2，4时，代数式ax+b 的值，依次得到下列四个结果，已知其中只有三个是正确的，那么错误的一个是（）A．﹣a+b＝﹣1 B．a+b＝5 C．2a+b＝7 D．4a+b＝14 8．（3分）下列命题中真命题的个数是（）①平面内，过一点有且只有一条直线与已知直线平行；②，，3.14，π，0.3010010001……（每两个1之间依次增加1个0），这5个数中有2个是无理数；③若m＜0，则点P（﹣m，5）在第一象限；④的算术平方根是4；⑤经过一点有且只有一条直线与已知直线垂直；⑥无限小数都是无理数．A．2 B．3 C．4 D．59．（3分）如果|x|+x+y＝10，|y|+x﹣y＝12，那么x+y的值是（）A．﹣2 B．2 C．D．10．（3分）在平面直角坐标系xOy中，对于点P（x，y），我们把P1（y﹣1，﹣x﹣1）叫做点P的友好点，已知点A1的友好点为A2，点A2的友好点为A3，点A3的友好点为A4，……这样依次得到各点．若A2020的坐标为（4，﹣3），设A1（x，y），则x+y的值是（）A．﹣9 B．7 C．﹣3 D．1二、填空题（每题3分，共18分）11．（3分）在平面直角坐标系内，有一条直线PQ平行于y轴，已知直线PQ上有两个点，坐标分别为（﹣a，﹣2）和（3，6），则a＝．12．（3分）把一张长方形纸条ABCD沿AF折叠，使点B落在E点处，已知∠ADB＝35°，那么∠BAF＝时，AE∥BD．13．（3分）已知两个角的两边分别平行，且其中一个角比另一个角的3倍少40°，那么这两个角的度数分别是．14．（3分）已知A（2，0），点P（x，y）的坐标满足，且S△AOP＝4，则k的值为．15．（3分）如图，直线BC经过原点O，点A在x轴上，AD⊥BC于D，若B（m，3），C（n，﹣4），A（5，0），则AD•BC的值为．16．（3分）已知关于x，y的方程组有无数多组解，则代数式﹣3（n﹣mn）+2（mn﹣m）的值为．三、解答题（共72分）17．（8分）计算（1）2﹣；（2）（﹣2）3×﹣（﹣6）2÷9﹣．18．（8分）解下列方程组（1）；（2）．19．（8分）已知x＝，y＝是x的相反数，求x2+y2的平方根与立方根．20．（8分）如图，在平面直角坐标系中，已知A（2，2）、B（3，0）、C（5，4）、B1（﹣1，﹣1），将三角形ABC平移后使得点B与点B1重合，得三角形A1B1C1．（1）画出三角形A1B1C1并写出另外两个顶点的坐标A1，C1；（2）三角形ABC的面积为；（3）若PB1∥x轴，S△BCP＝3，直接写出P点的坐标．21．（8分）某山区有若干名中，小学生因贫困失学需要捐助，资助一名中学生的学习费用需要a元，资助一名小学生的学习费用需要b元．某校学生积极捐款，初中各年级学生捐款数额与其捐助贫困中学生和小学生人数的部分情况如下表：捐款数额/元资助贫困中学生人数/名资助贫困小学生人数/名七年级4000 2 4八年级4200 3 3九年级5000（1）求a，b的值；（2）九年级学生的捐款恰好解决了剩余贫困中小学生的学习费用，请计算九年级学生可捐助的贫困小学生人数．22．（10分）已知：方程（|m|﹣1）x2﹣（m﹣1）x﹣200＝0是关于x的一元一次方程，无论k为何值，z＝﹣1总是方程﹣＝100的解，设∠AMD＝x°，∠ACB＝y°，（1）求x，y；（2）若∠DEF＝∠ABC，求证：AB∥EF．23．（10分）如图1，点A（a，0）、B（b，0），其中a、b满足（3a+b）2＝0，将点A、B分别向上平移2个单位，再向右平移1个单位至C、D，连接AC、BD．（1）连接AD交OC于一点F，求OF；（2）如图2，点M从O点出发，以每秒1个单位的速度向上平移运动，同时点N从B 点出发，以每秒2个单位的速度向左平移运动，设射线DN交y轴于点G．问S△GMD﹣S△OGN 的值是否为定值？如果是定值，请求出它的值；如果不是定值，请说明理由．24．（12分）如图，平面直角坐标系中，直线BD分别交x轴、y轴于B、D两点，A、C是过D点的直线上两点，连接OA、OC、BD，∠CBO＝∠COB，且OD平分∠AOC．（1）请判断AO与CB的位置关系，并予以证明；（2）沿OA、AC、BC放置三面镜子，从O点发出的一条光线沿x轴负方向射出，经AC、CB、OA反射后，恰好由O点沿y轴负方向射出，若AC⊥BD，求∠ODB；（3）在（2）的条件下，沿垂直于DB的方向放置一面镜子l，从射线OA上任意一点P 发出的光线经B点反射，反射光线与射线OC交于Q点，OQ交BP于M点，给出两个结论：①∠OMB的度数不变；②∠OPB+∠OQB的度数不变．可以证明，其中有且只有一个是正确的，请你作出正确的判断并求值．参考答案与解析一、选择题（每题3分，共30分）1．（3分）下列各式中正确的是（）A．＝±2 B．＝4 C．＝﹣3 D．＝4【分析】根据平方根、算术平方根、立方根的定义逐项进行计算即可．【解答】解：＝2，因此选项A不符合题意；∵43＝64，∴＝4，因此选项B符合题意；由于负数没有平方根，所以无意义，因此选项C不符合题意；＝2，因此选项D不符合题意；故选：B．2．（3分）把方程2x﹣y＝3改写成用含x的式子表示y的形式正确的是（）A．2x＝y+3 B．x＝C．y＝2x﹣3 D．y＝3﹣2x【分析】将x看作常数移项求出y即可得．【解答】解：由2x﹣y＝3知2x﹣3＝y，即y＝2x﹣3，故选：C．3．（3分）将点A（﹣4，﹣1）向右平移2个单位长度，再向上平移3个单位长度得点A′，则点A′的坐标是（）A．（2，2）B．（﹣2，2）C．（﹣2，﹣2）D．（2，﹣2）【分析】直接利用平移中点的变化规律求解即可．【解答】解：A（﹣4，﹣1）向右平移2个单位长度得到：（﹣4+2，﹣1），即（﹣2，﹣1），再向上平移3个单位长度得到：（﹣2，﹣1+3），即（﹣2，2）．故选：B．4．（3分）如果点A（a、b）在第三象限，则点B（﹣a+1，3b﹣5）关于原点的对称点是（）A．第一象限B．第二象限C．第三象限D．第四象限【分析】此题首先明确两个点关于原点对称，则横、纵坐标都是互为相反数；然后能够根据点所在的位置判断点的坐标符号，根据坐标符号得到字母的取值范围．【解答】解：∵点B（﹣a+1，3b﹣5）关于原点的对称点是（a﹣1，5﹣3b）．又∵点A在第三象限即a＜0，b＜0．∴a﹣1＜0，5﹣3b＞0，∴（a﹣1，5﹣3b）是第二象限的点．故选：B．5．（3分）如图，直线AB∥CD∥EF，且∠B＝40°，∠C＝125°，则∠CGB＝（）A．10°B．15°C．20°D．25°【分析】根据平行线的性质得出∠BGF＝∠B＝40°，∠C+∠CGF＝180°，求出∠CGF＝55°，即可得出答案．【解答】解：∵AB∥CD∥EF，∠B＝40°，∠C＝125°，∴∠BGF＝∠B＝40°，∠C+∠CGF＝180°，∴∠CGF＝55°，∴∠CGB＝∠CGF﹣∠BGF＝15°．故选：B．6．（3分）如图，已知AB∥CD，∠1＝55°，∠2＝45°，点G为∠BED内一点，∠BEG：∠DEG＝2：3，EF平分∠BED，则∠GEF＝（）A．18°B．15°C．12°D．10°【分析】根据平行线的性质得出∠BEF和∠DEF的值，进而利用角平分线和角之间的关系解答即可．【解答】解：过点E作EM∥AB，∵AB∥CD，∴EM∥AB∥CD，∵∠1＝55°，∠2＝45°，∴∠BEM＝∠1＝55°，∠DEM＝∠2＝45°，∴∠BED＝55°+45°＝100°．∵EF平分∠BED，∴∠BEF＝50°．∵∠BEG：∠DEG＝2：3，∠BEG+∠DEG＝100°，∴∠BEG＝40°，∴∠GEF＝50°﹣40°＝10°．故选：D．7．（3分）a、b是两个给定的整数，某同学分别计算当x＝﹣1，1，2，4时，代数式ax+b 的值，依次得到下列四个结果，已知其中只有三个是正确的，那么错误的一个是（）A．﹣a+b＝﹣1 B．a+b＝5 C．2a+b＝7 D．4a+b＝14【分析】先联合A、B，把所得的解代入C、D，若只有一个错，说明符合题意；若C、D 都错则说明A、B中有一个错误，以此类推，可找出答案．【解答】解：当x＝﹣1时，ax+b＝﹣a+b；当x＝1时，ax+b＝a+b；当x＝2时，ax+b＝2a+b；当x＝4时，ax+b＝4a+b；若A、B正确，解关于AB的二元一次方程组可得，把a、b的值代入C、D，可知2a+b＝8≠7，4a+b＝14，即C错误；若B、C正确，解关于B、C的二元一次方程组可得，把a、b的值代入A、D，可知a+b＝5≠﹣1，4a+b＝11≠14，即A、D错误，说明B、C里有一个错误，同理，若C、D正确，可得，而A、B都错，说明C、D里有一个错误，综合可知C错．故选：A．8．（3分）下列命题中真命题的个数是（）①平面内，过一点有且只有一条直线与已知直线平行；②，，3.14，π，0.3010010001……（每两个1之间依次增加1个0），这5个数中有2个是无理数；③若m＜0，则点P（﹣m，5）在第一象限；④的算术平方根是4；⑤经过一点有且只有一条直线与已知直线垂直；⑥无限小数都是无理数．A．2 B．3 C．4 D．5【分析】根据平行、垂直、实数分类、算式平方根等定义，定理逐项判断．【解答】解：平面内，过直线外一点有且只有一条直线与已知直线平行；故①是假命题；，，3.14，π，0.3010010001……（每两个1之间依次增加1个0），这5个数中有2个是无理数；故②是真命题；若m＜0，则点P（﹣m，5）在第一象限；故③是真命题；的算术平方根是2；故④是假命题；平面内，经过一点有且只有一条直线与已知直线垂直；故⑤是假命题；无限不循环小数是无理数，故⑥是假命题；∴真命题有：②③两个，故选：A．9．（3分）如果|x|+x+y＝10，|y|+x﹣y＝12，那么x+y的值是（）A．﹣2 B．2 C．D．【分析】本题可分类讨论，根据不同的情况分类分析，从而得出正确的结果．【解答】解：①当x≥0，y≥0时，解得：，不符题意；②当x≥0，y＜0时，解得：，此时x+y＝﹣＝；③当x＜0，y≥0时，解得：，不符题意；④当x＜0，y＜0时，解得：，不符题意；故选：C．10．（3分）在平面直角坐标系xOy中，对于点P（x，y），我们把P1（y﹣1，﹣x﹣1）叫做点P的友好点，已知点A1的友好点为A2，点A2的友好点为A3，点A3的友好点为A4，……这样依次得到各点．若A2020的坐标为（4，﹣3），设A1（x，y），则x+y的值是（）A．﹣9 B．7 C．﹣3 D．1【分析】根据题意分别求出A1，A2，A3A4，A5的坐标，总结规律，根据规律解答即可．【解答】解：∵A1（x，y），点A1的友好点为A2，∴A2的（y﹣1，﹣x﹣1），同理可得，A3（﹣x﹣2，﹣y），A4（﹣y﹣1，x+1），A5（x，y），……，由此可得规律为：四个坐标为一个周期，∴A4＝A8＝……＝A2020，∵A2020的坐标为（4，﹣3），∴﹣y﹣1＝4，x+1＝﹣3，∴x＝﹣4，y＝﹣5，∴x+y＝﹣9．故选：A．二、填空题（每题3分，共18分）11．（3分）在平面直角坐标系内，有一条直线PQ平行于y轴，已知直线PQ上有两个点，坐标分别为（﹣a，﹣2）和（3，6），则a＝﹣3．【分析】根据平行于y轴的直线上的点的横坐标相同即可得解．【解答】解：∵直线PQ平行于y轴，∴直线上的点的横坐标相同，∵直线PQ两个点坐标分别为（﹣a，﹣2）和（3，6），∴﹣a＝3，即a＝﹣3．故答案填：﹣3．12．（3分）把一张长方形纸条ABCD沿AF折叠，使点B落在E点处，已知∠ADB＝35°，那么∠BAF＝62.5°时，AE∥BD．【分析】根据折叠的性质得到∠EAF＝∠BAF，要AE∥BD，则要有使∠BAE＝125°，即可求出∠BAF．【解答】解：∠BAF应为62.5度．理由是：∵∠ADB＝35°，四边形ABCD是长方形，∴∠ABD＝55°，∵要使AE∥BD，需使∠BAE＝125°，由折叠可知∠BAF＝∠EAF，∴∠BAF应为62.5°．故答案为：62.5°．13．（3分）已知两个角的两边分别平行，且其中一个角比另一个角的3倍少40°，那么这两个角的度数分别是20°，20°或55°、125°．【分析】根据条件可知这两个角相等或互补，利用方程思想可求得其大小．【解答】解：∵两个角的两边互相平行，∴这两个角相等或互补，设一个角为x°，则另一个角为（3x﹣40）°，当这两个角相等时，则有x＝3x﹣40，解得x＝20，此时这两个角分别为20°、20°；当这两个角互补时，则有x+3x﹣40＝180，解得x＝55，此时这两个角为55°、125°；故答案为：20°、20°或55°、125°．14．（3分）已知A（2，0），点P（x，y）的坐标满足，且S△AOP＝4，则k的值为﹣34或54．【分析】利用三角形面积求得y＝±4，解方程组求得y＝，进一步即可求得关于k 的方程，解方程即可．【解答】解：∵A（2，0），点P（x，y），∴OA＝2，∵S△AOP＝4，∴＝4，即×|y|＝4，∴y＝±4，，②×2﹣①得，11y＝10﹣k，∴y＝，当y＝4时，＝4，解得k＝﹣34；当y＝﹣4时，＝﹣4，解得k＝54；综上，k的值为﹣34或54，故答案为：﹣34或54．15．（3分）如图，直线BC经过原点O，点A在x轴上，AD⊥BC于D，若B（m，3），C （n，﹣4），A（5，0），则AD•BC的值为35．【分析】由B，C及A得到坐标，确定出BE，CF及OA的长，三角形ABC面积＝三角形AOB面积+三角形AOC面积，三角形ABC面积＝AD与BC乘积的一半，两者相等即可求出AD与BC的乘积．【解答】解：过B作BE⊥x轴于E，过C作CF⊥x轴于F，∵B（m，3），C（n，﹣4），A（5，0），∴BE＝3，CF＝4，OA＝5，∵S△ABC＝S△AOB+S△AOC＝OA•BE+OA•CF＝，S△ABC＝AD•BC，∴AD•BC＝，则AD•BC＝35．故答案为：35．16．（3分）已知关于x，y的方程组有无数多组解，则代数式﹣3（n﹣mn）+2（mn﹣m）的值为﹣．【分析】由关于x，y的方程组有无数多组解，得出，进而得出m＝﹣，n＝8，把﹣3（n﹣mn）+2（mn﹣m）化简后代入计算，即可得出答案．【解答】解：∵关于x，y的方程组有无数多组解，∴，∴m＝﹣，n＝8，∴﹣3（n﹣mn）+2（mn﹣m）＝﹣n+3mn+2mn﹣m＝﹣n+5mn﹣m＝﹣8+5×（﹣）×8﹣（﹣）＝﹣8﹣180+＝﹣，故答案为：﹣．三、解答题（共72分）17．（8分）计算（1）2﹣；（2）（﹣2）3×﹣（﹣6）2÷9﹣．【分析】（1）直接利用二次根式的加减运算法则、二次根式的性质化简，进而得出答案；（2）直接利用二次根式的性质以及立方根的性质、有理数的乘方运算法则分别化简，进而得出答案．【解答】解：（1）原式＝7﹣2；（2）原式＝﹣8×﹣36÷9﹣2﹣＝﹣12﹣4﹣2﹣＝﹣18．18．（8分）解下列方程组（1）；（2）．【分析】（1）①×2﹣②得出﹣5y＝﹣14，求出y，再把y＝代入①求出x即可；（2）①×2+②×3得出13x＝47，求出x，再把x＝代入①求出y即可．【解答】解：（1），①×2﹣②，得﹣5y＝﹣14，解得：y＝，把y＝代入①，得x﹣＝﹣5，解得：x＝﹣，所以原方程组的解是；（2）整理得：，①×2+②×3，得13x＝47，解得：x＝，把x＝代入①，得﹣3y＝1，解得：y＝，所以原方程组的解是．19．（8分）已知x＝，y＝是x的相反数，求x2+y2的平方根与立方根．【分析】利用算术平方根和立方根定义可得m的值，进而可得x、y的值，然后计算出x2+y2的平方根与立方根．【解答】解：∵x＝，y＝是x的相反数，∴m＝0或1，当m＝0时，y＝0，x＝0，x2+y2＝0，0的平方根是0，立方根也是0；当m＝1时，x＝1，y＝﹣1，则x2+y2＝2，2的平方根是±，立方根是．20．（8分）如图，在平面直角坐标系中，已知A（2，2）、B（3，0）、C（5，4）、B1（﹣1，﹣1），将三角形ABC平移后使得点B与点B1重合，得三角形A1B1C1．（1）画出三角形A1B1C1并写出另外两个顶点的坐标A1（﹣2，1），C1（1，3）；（2）三角形ABC的面积为4；（3）若PB1∥x轴，S△BCP＝3，直接写出P点的坐标（1，﹣1）或（4，﹣1）．【分析】（1）利用平移变换的性质分别作出A，B，C的对应点A1，B1，C1即可；（2）把三角形的面积看成矩形的面积减去周围的三个三角形的面积即可；（3）分两种情形，利用分割法构建方程解决问题即可．【解答】解：（1）如图，△A1B1C1即为所求．A1（﹣2，1），C1（1，3）．故答案为：（﹣2，1），（1，3）；（2）S△ABC＝3×4﹣×1×2﹣×2×3﹣×2×4＝4．故答案为：4；（3）设P（m，﹣1），当点P在BC的左侧时，×5×（5﹣m）﹣×5×2﹣×（5﹣m）×1＝3，解得m＝1，当点P在BC的右侧时，同法可得，5×（m﹣3）﹣×2×4﹣×5×（m﹣5）﹣×1×（m ﹣3）＝3，解得m＝4，∴满足条件的点P的坐标为（1，﹣1）或（4，﹣1）．故答案为：（1，﹣1）或（4，﹣1）．21．（8分）某山区有若干名中，小学生因贫困失学需要捐助，资助一名中学生的学习费用需要a元，资助一名小学生的学习费用需要b元．某校学生积极捐款，初中各年级学生捐款数额与其捐助贫困中学生和小学生人数的部分情况如下表：捐款数额/元资助贫困中学生人数/名资助贫困小学生人数/名七年级4000 2 4八年级4200 3 3九年级5000（1）求a，b的值；（2）九年级学生的捐款恰好解决了剩余贫困中小学生的学习费用，请计算九年级学生可捐助的贫困小学生人数．【分析】根据题意可知，本题中的相等关系是捐款额，列方程组求解即可．（2）利用九年级的捐款额5000列方程求人数．【解答】解：（1）由题意得：解得：（2）设初三年级学生捐助x名贫困中学生，捐助y名贫困小学生．由题意得：800x+600y＝5000得：4x+3y＝25∵x、y均为非负整数∴x＝1，y＝7或x＝4，y＝3答：初三年级学生可捐助1名贫困中学生，捐助7名贫困小学生；或捐助4名贫困中学生，捐助3名贫困小学生．22．（10分）已知：方程（|m|﹣1）x2﹣（m﹣1）x﹣200＝0是关于x的一元一次方程，无论k为何值，z＝﹣1总是方程﹣＝100的解，设∠AMD＝x°，∠ACB＝y°，（1）求x，y；（2）若∠DEF＝∠ABC，求证：AB∥EF．【分析】（1）根据一元一次方程得定义求解即可；（2）根据平行线的判定定理求解即可．【解答】解：（1）根据题意得，|m|﹣1＝0且m﹣1≠0，解得，m＝﹣1，则关于x的一元一次方程为2x﹣200＝0，∴x＝100，∴关于x的一元一次方程为﹣（﹣1﹣1）x﹣200＝0，∴x＝100，当z＝﹣1时，方程﹣＝100变形为：﹣＝100，整理得，（﹣2k+2y）﹣（﹣200﹣ak）＝400，﹣2k+2y+200+ak＝400，（a﹣2）k+2y﹣200＝0，∵无论k为何值，z＝﹣1总是方程﹣＝100的解，∴a﹣2＝0，2y﹣200＝0，∴a＝2，y＝100；（2）由（1），得x＝100，y＝100，∵∠AMD＝x°，∠ACB＝y°，∴∠AMD＝100°，∠ACB＝100°，∴∠AMD＝∠ACB，∴DE∥BC，∴∠DEF＝∠EGC，∵∠DEF＝∠ABC，∴∠EGC＝∠ABC，∴AB∥EF．23．（10分）如图1，点A（a，0）、B（b，0），其中a、b满足（3a+b）2＝0，将点A、B分别向上平移2个单位，再向右平移1个单位至C、D，连接AC、BD．（1）连接AD交OC于一点F，求OF；（2）如图2，点M从O点出发，以每秒1个单位的速度向上平移运动，同时点N从B 点出发，以每秒2个单位的速度向左平移运动，设射线DN交y轴于点G．问S△GMD﹣S△OGN 的值是否为定值？如果是定值，请求出它的值；如果不是定值，请说明理由．【分析】（1）利用非负数的性质求出a，b的值，再利用面积法求解；（2）结论：S△FMD﹣S△OFN的值是定值．分两种情形：如图2﹣1中，当点N在线段OB 上时，连接OD．如图2﹣2中，当点N在BO的延长线上时，连接OD．分别求解即可．【解答】解：（1）∵（3a+b）2+＝0，又∵（3a+b）2≥0，b﹣a﹣4≥0，∴，解得，∴A（﹣1，0），B（3，0），∴AB＝CD＝4，∵OC＝2，CD∥AB，∴D（4，2），∵S△ACD＝S△ACF+S△CDF，∴CO•CD＝CF•AO+CF•CD，即×4×2＝×CF×1+×CF×4，∴CF＝；（2）结论：S△FMD﹣S△OFN的值是定值．理由：如图2﹣1中，当点N在线段OB上时，连接OD．设运动时间为t秒，由题意：OM＝t，BN＝2t，∴S△OMD＝×t×4＝2t，S△DBN＝×2t×2＝2t，∴S△OMD＝S△BND，∴S四边形DMON＝S△OBD＝×3×2＝3，∵S△FMD﹣S△OFN＝S四边形DMON＝3＝定值．如图2﹣2中，当点N在BO的延长线上时，连接OD．∵S△FMD﹣S△OFN＝S△ODM﹣S△ODN＝S△DBN﹣S△ODN＝S△OBD＝3＝定值，综上所述，S△FMD﹣S△OFN的值是定值，定值为3．24．（12分）如图，平面直角坐标系中，直线BD分别交x轴、y轴于B、D两点，A、C是过D点的直线上两点，连接OA、OC、BD，∠CBO＝∠COB，且OD平分∠AOC．（1）请判断AO与CB的位置关系，并予以证明；（2）沿OA、AC、BC放置三面镜子，从O点发出的一条光线沿x轴负方向射出，经AC、CB、OA反射后，恰好由O点沿y轴负方向射出，若AC⊥BD，求∠ODB；（3）在（2）的条件下，沿垂直于DB的方向放置一面镜子l，从射线OA上任意一点P 发出的光线经B点反射，反射光线与射线OC交于Q点，OQ交BP于M点，给出两个结论：①∠OMB的度数不变；②∠OPB+∠OQB的度数不变．可以证明，其中有且只有一个是正确的，请你作出正确的判断并求值．【分析】（1）AO与CB平行，只要证明∠AOB+∠OBC＝180°即可；（2）作垂线GE⊥CB、FO⊥AO，由GE、OF为法线，∠DEG＝∠GEO，∠EOF＝∠BOF，再由平行线的性质即可求解；（3）设∠AOD＝∠DOQ＝x，∠PBD＝∠QBD＝y，在△PNO和△QNB中∠OPB+x＝45°+y，在△QHB和△DHO中∠OQB+y＝45°+x，【解答】解：（1）平行．证明：设∠AOD＝∠COD＝x，∠BOC＝∠OBC＝y，则∠BOD＝x+y＝90°，故2x+2y＝180°，即∠AOB+∠OBC＝180°，得AO∥CB．（2）如图所示，作垂线GE⊥CB、FO⊥AO．∵AO∥CB，∴FO⊥BC；∴GE∥OF（垂直于同一条直线的两条直线平行），∴∠GEO＝∠FOE；∵GE、OF为法线，∴∠DEG＝∠GEO，∠EOF＝∠BOF，∴∠DEO＝∠EOB，∴DE∥OB∴∠EDB＝∠DBO，∵BD为法线，∴∠EDB＝∠BDO，∴∠BDO＝∠DBO，∴∠BDO＝45°．（3）选②，∠OPB+∠OQB＝90°，证明：设∠AOD＝∠DOQ＝x，∠PBD＝∠QBD＝y，在△PNO和△DNB中∠OPB+x＝45°+y，在△QHB和△DHO中∠OQB+y＝45°+x，。
湖北省武汉市七年级下学期英语期中试卷(含答案)
湖北省武汉市七年级下学期英语期中试卷阅卷人一、选择填空，从题中所给的A、B、C、D四个选项中，选出一个最佳答案。
（共15小题,每小题1分，满分15分）得分1．—Don't take photos here,please.—________.A．No way B．Sorry,I won'tC．Here you are D．It's my pleasure2．—I have a math test tomorrow.—________.A．That sounds great B．Well doneC．Good for you D．Good luck3．—Hello.Is Alice there?—No,she isn't.She________at the supermarket.A．shops B．shopping C．is shopping D．shopped4．—Sally________the piano very well.—Quite right.She practices every day.A．plays B．is playing C．played D．playing5．—I'm good________old people.I can help at the old people's home.—It's very kind of youA．at B．for C．with D．on6．I only have two tickets to The Battle Lake Changjin.________you________Jenny can go with me. A．Either;or B．Either;and C．Both;or D．Both;and7．—is it from here to the museum?—About20minutes by bike.A．How long B．How far C．How often D．How soon 8．—They want to________the two cities by a bridge.—Good idea.A．make B．take C．cross D．join9．—Joe,I know you are in the UK.Do you like your host family?—Yes,I do.But there's________"no place like home".A．still B．also C．just D．too10．—Why do you think elephants are________?—Because they always remember places with food and water.A．scary B．smart C．lazy D．beautiful 11．—What do you think of Lily and Lucy?—One is quiet and________is hard working.A．one B．another C．other D．the other 12．—Have a________of this cake to see if you like it.—OK.A．taste B．look C．smell D．watch 13．—Doctor,how can I keep healthy?—Well,you should first________on smokingA．cut up B．cut in C．cut down D．cut off14．Jim is arriving in Wuhan.We are all at the________to meet him.A．library B．station C．hospital D．zoo15．—Do you know________?—Jill.A．what's his name B．what's her nameC．what her name is D．what his name is阅卷人二、完形填空（共1小题,每小题15分,满分15分）得分完形填空There is a man who keeps three monkeys in his house.The monkeys are very16．and they can do many things.The man loves his17．.And he thinks they can try something new,so he begins to18．them to dance.The monkeys don't like dancing at first,but the man is19．them.These monkeys have to 20．hard every day.Soon they can dance very well.The man is very happy about that.One day,he21．the monkeys up in special clothes and masks,and takes them to a party.He wants people to22．his smart friends.The dancing monkeys are23．at the party.Nobody knows that they are monkeys,and people are 24．to them.The monkeys are very happy to have lots of25．food there.Suddenly（突然地）,a child puts some bananas in front of the dancing monkeys.The monkeys 26．everything then.27．of them run to the bananas and begin to eat.Now all the people at the party laugh."They aren't dancers at all",cries one man."They are 28．monkeys!""And,"29．another man."What we see isn't always30．".16．A．lazy B．smart C．kind D．lovely 17．A．pets B．places C．children D．groups 18．A．run B．teach C．cross D．fight 19．A．right for B．good with C．strict with D．afraid of 20．A．follow B．use C．live D．practice 21．A．dresses B．makes C．saves D．puts 22．A．feel B．taste C．watch D．listen 23．A．welcome B．sorry C．important D．beautiful 24．A．friendly B．shy C．difficult25．A．quick B．terrible C．lucky D．delicious 26．A．keep B．forget C．leave D．remember 27．A．Any B．Much C．All D．Either 28．A．still B．often C．just D．also 29．A．speaks B．tells C．talks D．says 30．A．true B．dangerous C．nice D．young阅卷人三、阅读理解（共3小题，每小题10分，满分30分）得分阅读下面材料，从每题所给的A、B、C、D四个选项中，选出最佳选项。
湖北省武汉外校2022学年七年级数学下学期期中试卷（解析版） 习题教版
2022-2022学年湖北省武汉外校七年级（下）期中数学试卷参考答案与试题解析一、填空题（每小题3分，共30分）1．（3分）在3，0，﹣2，四个数中，最小的数是﹣2 ．考点：实数大小比较．专题：计算题．分析：先根据正数大于0，负数小于0，比较大小即可．解答：解：根据题意得：﹣2＜0＜＜3，则﹣2是最小的数．故答案为：﹣2．点评：此题考查了实数的大小比较，比较简单，是一道基本题型．2．（3分）如图，若AO⊥OC，DO⊥OB，∠AOB：∠BOC=32：13，则∠COD=64°．考点：垂线．分析：根据垂直的定义得出∠AOC=90°，∠BOD=90°，设∠AOB=32，∠BOC=13，则3213=90°，进而得出∠BOC的度数，即可得出∠COD的度数．解答：解：∵∠AOB：∠BOC=32：13，∴设∠AOB=32，∠BOC=13，∵AO⊥OC，DO⊥OB，∴∠AOC=90°，∠BOD=90°，∴3213=90°，解得：=2，∴∠BOC=13×2°=26°，则∠COD=90°﹣26°=64°．故答案为：64°．点评：此题主要考查了垂线的定义，根据已知得出∠BOC的度数是解题关键．3．（3分）如图，三条直线AB、CD、EF相交于同一点O，如果∠AOE=2∠AOC，∠COF=∠AOE，那么∠DOE= 90°．考点：对顶角、邻补角．分析：首先设∠AOE=°，则∠AOC=°，∠COF=°，进而得到方程=180，再解方程可得的值，即可算出∠COF，再根据对顶角相等可得答案．解答：解：设∠AOE=°，则∠AOC=°，∠COF=°，=180，解得：=60，∠COF=×60°=90°，∠DOE=∠COF=90°，故答案为：90°．点评：此题主要考查了对顶角、平角，关键是掌握对顶角相等，平角=180°．4．（3分）（2022•成都）已知：（b5）2=0，那么ab的值为﹣3 ．考点：非负数的性质：算术平方根；非负数的性质：偶次方．分析：首先根据非负数的性质可求出a、b的值，进而可求出a、b的和．解答：解：∵（b5）2=0，∴a﹣2=0，b5=0，∴a=2，b=﹣5；因此ab=2﹣5=﹣3．故结果为：﹣3点评：此题主要考查了非负数的性质，初中阶段有三种类型的非负数：绝对值、偶次方、二次根式（算术平方根）．当它们相加和为0时，必须满足其中的每一项都等于0．5．（3分）如图，若EF∥BC，DE∥AB，∠FED=40°，则∠B=40°．考点：平行线的性质．分析：根据EF∥BC，DE∥AB，可得四边形BDEF为平行四边形，然后根据平行四边形的性质：对角相等，可得出∠B=∠FED=40°．解答：解：∵EF∥BC，DE∥AB，∴四边形BDEF为平行四边形，∵∠FED=40°，∴∠B=∠FED=40°．故答案为：40°．点评：本题考查了平行线的性质，解答本题的关键是根据直线平行判断四边形BDEF为平行四边形，然后根据平行四边形的性质求出∠B的度数．6．（3分）如图，若AB∥CD，EF⊥CD，∠1=54°，则∠2=36°．考点：平行线的性质．分析：首先根据AB∥CD，可得∠1=∠3=54°，然后根据EF⊥CD，求得∠2=90°﹣∠3．解答：解：∵AB∥CD，∴∠1=∠3=54°，∵EF⊥CD，∴∠2=90°﹣∠3=90°﹣54°=36°．故答案为：36°．点评：本题考查了平行线的性质，解答本题的关键是掌握平行线的性质：两直线平行，同位角相等．7．（3分）如果一个数的平方根是a6和2a﹣15，则这个数为81 ．考点：平方根．分析：根据两个平方根互为相反数，即可列方程得到a的值，然后根据平方根的定义求得这个数．解答：解：根据题意得：a6（2a﹣15）=0，解得：a=3．则这个数是（a6）2=（36）2=81．故答案是：81．点评：本题考查了平方根的概念．注意一个正数有两个平方根，它们互为相反数，正确求得a的值是关键．8．（3分）=，则±= ±．考点：算术平方根．分析：根据算术平方根的意义，把被开方数的小数点进行移动（每移动两位，结果移动一位），进行填空即可．解答：解：∵=，∴±═±，故答案为：±．点评：本题考查了算术平方根的移动规律的应用，能根据移动规律填空是解此题的关键．9．（3分）把下列命题写成“如果…那么…”的形式：不能被2整除的数是奇数：如果一个数不能被2整除，那么这个数是奇数．考点：命题与定理．分析：先分清命题“不能被2整除的数是奇数”的题设与结论，然后写成“如果…那么…”的形式．解答：解：不能被2整除的数是奇数写成“如果…那么…”的形式为：如果一个数不能被2整除，那么这个数为奇数．故答案为如果一个数不能被2整除，那么这个数为奇数．点评：本题考查了命题与定理：判断事物的语句叫命题；正确的命题称为真命题，错误的命题称为假命题；经过推理论证的真命题称为定理．也考查了逆命题．10．（3分）把∠ABC向下平移2cm得∠A′B′C′，则当∠ABC=30°时，∠A′B′C′=30°．考点：平移的性质．分析：根据平移的性质直接得出答案即可．解答：解：∵把∠ABC向下平移2cm得∠A′B′C′，∴当∠ABC=30°时，∠A′B′C′=30°．故答案为：30°．点评：此题主要考查了平移的性质，熟练根据平移的性质得出是解题关键．二、选择题（每小题3分，共30分）11．（3分）下列说法正确的是（）A．垂线段最短B．线段最短C．过A、B两点作直线AB垂直于直线D．过A、B两点作直线AB平行于直线考点：垂线段最短；作图—尺规作图的定义．分析：根据垂线段最短的性质对各选项进行逐一分析即可．解答：解：A、垂线段最短符合点到直线距离的定义，故本选项正确；B、只有垂线段最短，故本选项错误；C、只能过直线外一点作已知直线的垂线，故故本选项错误；D、只能过直线外一点作已知直线的平行线，故故本选项错误．故选A．点评：本题考查的是垂线段最短，熟知垂线段最短，指的是从直线外一点到这条直线所作的垂线段最短．它是相对于这点与直线上其他各点的连线而言是解答此题的关键．12．（3分）点到直线的距离是指（）A．从直线外一点到这条直线的垂线B．从直线外一点到这条直线的垂线段C．从直线外一点到这条直线的垂线的长D．从直线外一点到这条直线的垂线段的长考点：点到直线的距离．分析：根据点到直线的距离的定义解答本题．解答：解：A、垂线是直线，没有长度，不能表示距离，错误；B、垂线段是一个图形，距离是指垂线段的长度，错误；C、垂线是直线，没有长度，不能表示距离，错误；D、符合点到直线的距离的定义，正确．故选D．点评：此题主要考查了从直线外一点到这条直线的垂线段的长度，叫做点到直线的距离的定义．13．（3分）下列说法错误的是（）A．无数条直线可交于一点B．直线的垂线有无数条，但过一点与垂直的直线只有一条C．直线的平行线有无数条，但过直线外一点的平行线只有一条D．互为邻补角的两个角一个是钝角，一个是锐角考点：平行公理及推论；相交线；对顶角、邻补角；垂线．分析：根据直线的位置关系、垂线的性质、平行公理，邻补角定义即可判断．解答：解：A、由于过一点可以画无数条直线，所以无数条直线可交于一点，故说法正确，本选项不符合题意；B、直线的垂线有无数条，但过一点与垂直的直线只有一条，故说法正确，本选项不符合题意；C、直线的平行线有无数条，但过直线外一点的平行线只有一条，故说法正确，本选项不符合题意；D、互为邻补角的两个角还有可能都是直角，故说法错误，本选项符合题意．故选D．点评：本题考查了直线的位置关系、垂线的性质、平行公理，邻补角定义，比较简单．14．（3分）如图，下列判断正确的是（）A．∠2与∠5是对顶角B．∠2与∠4是同位角C．∠3与∠6是同位角D．∠5与∠3是内错角考点：同位角、内错角、同旁内角；对顶角、邻补角．分析：根据对顶角、同位角、同旁内角、内错角的定义分别进行分析即可．解答：解：A、∠2与∠5是对顶角，故此选项正确；B、∠2与∠4是不是同位角，故此选项错误；C、∠3与∠6是同旁内角，故此选项错误；D、∠5与∠3不是内错角，故此选项错误；故选：A．点评：此题主要考查了对顶角、同位角、同旁内角、内错角，关键是掌握同位角的边构成“F“形，内错角的边构成“Z“形，同旁内角的边构成“U”形．15．（3分）下列各组数中互为相反数的是（）A．﹣2与B．﹣2与C．﹣2与D．2与|﹣2|考点：实数的性质．分析：根据只有符号不同的两个数叫做互为相反数对各选项分析判断后利用排除法求解．解答：解：A、=2，﹣2与是互为相反数，故本选项正确；B、=﹣2，﹣2与相等，不是互为相反数，故本选项错误；C、﹣2与﹣是互为倒数，不是互为相反数，故本选项错误；D、|﹣2|=2，2与|﹣2|相等，不是互为相反数，故本选项错误．故选A．点评：本题考查了实数的性质，对各项准确计算是解题的关键．16．（3分）（2022•黔东南州）下列运算正确的是（）A．=±3B．|﹣3|=﹣3 C．﹣=﹣3 D．﹣32=9考点：算术平方根．专题：计算题．分析：A、根据算术平方根的定义即可判定；B、根据绝对值的定义即可判定；C、根据平方根的定义即可判定；D、根据平方的计算方法即可判定．解答：解：A、是求9的算术平方根，所以是3，故选项错误；B、负数的绝对值是正数，结果是3，故选项错误；C、﹣=﹣3，故选项正确；D、﹣32=﹣9，故选项错误．故选C．点评：本题主要考查了平方根，算术平方根和绝对值及平方的有关知识．要求学生对于这些基础知识比较熟练．17．（3分）如图，点E、F分别是AB、CD上的点，点G是BC的延长线上一点，且∠B=∠DCG=∠D，则下列判断错误的是（）A．∠ADF=∠DCG B．∠A=∠BCF C．∠AEF=∠EBC D．∠BEF∠EFC=180°考点：平行线的判定与性质．分析：根据平行线的性质和判定逐个推出，即可得出选项．解答：解：A、∵∠DCG=∠D，∴AD∥BC，∴∠ADF=∠DCG，正确，故本选项错误；B、∵∠DCG=∠D，∴AD∥BC，∴∠A∠B=180°，∵∠B=∠DCG，∠DCG∠BCF=180°，∴∠A=∠BCF，正确，故本选项错误；C、根据已知不能推出∠AEF=∠EBC，错误，故本选项正确；D、∵AB∥CD，∴∠BEF∠EFC=180°，正确，故本选项错误；故选C．点评：本题考查了平行线性质和判定的应用，主要考查学生的推理能力和辨析能力．18．（3分）如图，OP∥QR∥ST，则下列各式中正确的是（）A．∠1∠2∠3=180°B．∠1∠2﹣∠3=90°C．∠1﹣∠2∠3=90°D．∠2∠3﹣∠1=180°考点：平行线的性质．专题：探究型．分析：延长TS，由OP∥QR∥ST可知∠2=∠4，∠ESR=180°﹣∠3，再由三角形外角的性质即可得出结论．解答：解：延长TS，∵OP∥QR∥ST，∴∠2=∠4，∵∠3与∠ESR互补，∴∠ESR=180°﹣∠3，∵∠4是△FSR的外角，∴∠ESR∠1=∠4，即180°﹣∠3∠1=∠2，∴∠2∠3﹣∠1=180°．故选D．点评：本题考查的是平行线的性质及三角形外角的性质，根据题意作出辅助线，构造出三角形，利用三角形外角的性质求解是解答此题的关键．19．（3分）如图，若∠1与∠2互为补角，∠2与∠3互为补角，则一定有（）A．a∥b B．c∥d C．a∥c D．b∥d考点：平行线的判定．分析：根据已知首先得出∠1=∠3，进而得出a∥c．解答：解：∵∠1与∠2互为补角，∠2与∠3互为补角，∴∠1=∠3（同角的补角相等），∴a∥c（内错角相等，两直线平行）．故选：C．点评：此题主要考查了平行线的判定，根据已知得出∠1=∠3是解题关键．20．（3分）（2022•威海）实数a，b在数轴上的位置如图所示，则下列结论正确的是（）A．a b＞0 B．a﹣b＞0 C．a•b＞0 D．＞0考点：数轴；有理数的混合运算．分析：由题意可知﹣1＜a＜0，b＞1，故a、b异号，且|a|＜|b|．根据有理数加减法得ab的值应取b的符号“”，故ab＞0；由b＞1得﹣b＜0，而a＜0，所以a﹣b=a（﹣b）＜0；根据有理数的乘除法法则可知a•b＜0，＜0．解答：解：依题意得：﹣1＜a＜0，b＞1∴a、b异号，且|a|＜|b|．∴ab＞0；a﹣b=﹣|ab|＜0；a•b＜0；＜0．故选A．点评：本题考查了数轴和有理数的四则运算．三、解答题（共60分）21．（9分）将下列各数填入相应的集合内．﹣7，，，0，，，，π，…①有理数集合{ …}②无理数集合{ …}③负实数集合{ …}．考点：实数．分析：根据实数的分类：实数分为有理数、无理数．或者实数分为正实数、0、负实数．进行填空．解答：解：=5，=2．①有理数集合{﹣7，，0，，}②无理数集合{，，，π}③负实数集合{﹣7}．故答案是：﹣7，，0，，；，，，π；﹣7．点评：本题考查了实数的分类．注意0既不是正实数，也不是负实数．22．（10分）已知：如图，AB∥CD，EF∥AB，BE、DE分别平分∠ABD、∠BDC．求证：∠1与∠2互余．考点：平行线的性质．专题：证明题．分析：先根据AB∥CD得出∠ABD∠BDC=180°，再根据BE、DE分别平分∠ABD、∠BDC可知∠EBD∠EDB=90°，由三角形内角和定理可知，∠BED=90°，再根据平角的定义即可得出结论．解答：证明：∵AB∥CD，∴∠ABD∠BDC=180°，∵BE、DE分别平分∠ABD、∠BDC，∴∠EBD∠EDB=90°，∴∠BED=90°，∴∠1∠2=90°．点评：本题考查的是平行线的性质，用到的知识点为：两直线平行，同旁内角互补．23．（10分）已知：如图，∠B=∠ADE，∠EDC=∠GFB，GF⊥AB．求证：CD⊥AB．考点：平行线的判定与性质．专题：证明题．分析：根据平行线判定推出DE∥BC推出∠DCF=∠GFB，推出CD∥GF，即可得出答案．解答：证明：∵∠B=∠ADE，∴DE∥BC，∴∠EDC=∠DCF，∵∠EDC=∠GFB，∴∠DCF=∠GFB，∴CD∥GF，∴∠CDG=∠FGB，∵GF⊥AB∴∠CDG=∠FGB=90°，∴CD⊥AB．点评：本题考查了平行线性质和判定的应用，主要考查学生的推理能力．24．（10分）如图所示，已知∠1∠2=180°，∠3=∠B，试判断∠AED与∠C的大小关系，并对结论进行说理．考点：平行线的性质．专题：探究型．分析：由图中题意可先猜测∠AED=∠C，那么需证明DE∥BC．题中说∠1∠2=180°，而∠1∠4=180°所以∠2=∠4，那么可得到BD∥EF，题中有∠3=∠B，所以应根据平行得到∠3与∠ADE之间的关系为相等．就得到了∠B与∠ADE之间的关系为相等，那么DE∥BC．解答：证明：∵∠1∠4=180°（邻补角定义）∠1∠2=180°（已知）∴∠2=∠4（同角的补角相等）∴EF∥AB（内错角相等，两直线平行）∴∠3=∠ADE（两直线平行，内错角相等）又∵∠B=∠3（已知），∴∠ADE=∠B（等量代换），∴DE∥BC（同位角相等，两直线平行）∴∠AED=∠C（两直线平行，同位角相等）．点评：本题是先从结论出发得到需证明的条件，又从所给条件入手，得到需证明的条件．属于典型的从两头往中间证明．25．（11分）如图所示，已知AB∥CD，分别探究下面图形中∠APC，∠PAB，∠PCD的关系，请你从四个图形中任选一个，说明你所探究的结论的正确性．①结论：（1）∠APC∠PAB∠PCD=360°（2）∠APC=∠PAB∠PCD（3）∠PCD=∠APC∠PAB（4）∠PAB=∠APC∠PCD②选择结论（1），说明理由．考点：平行线的性质．分析：①（1）过点P作PE∥AB，则AB∥PE∥CD，再根据两直线平行同旁内角互补即可解答；（2）过点P作∥AB，则AB∥CD∥，再根据两直线内错角相等即可解答；（3）根据AB∥CD，可得出∠PEB=∠PCD，再根据三角形外角的性质进行解答；（4）根据AB∥CD，可得出∠PAB=∠PFD，再根据∠PFD是△CPF的外角，由三角形外角的性质进行解答；②选择①中任意一个进行证明即可．解答：解：①（1）过点P作PE∥AB，则AB∥PE∥CD，∴∠1∠PAB=180°，∠2∠PCD=180°，∴∠APC∠PAB∠PCD=360°；（2）过点P作直线∥AB，∵AB∥CD，∴AB∥PE∥CD，∴∠PAB=∠3，∠PCD=∠4，∴∠APC=∠PAB∠PCD；（3）∵AB∥CD，∴∠PEB=∠PCD，∵∠PEB是△APE的外角，∴∠PEB=∠PAB∠APC，∴∠PCD=∠APC∠PAB；（4）∵AB∥CD，∴∠PAB=∠PFD，∵∠PFD是△CPF的外角，∴∠PCD∠APC=∠PFD，∴∠PAB=∠APC∠PCD．②选择结论（1），证明同上．点评：本题考查的是平行线的性质及三角形外角的性质，能根据题意作出辅助线，再利用平行线的性质进行解答是解答此题的关键．26．（10分）计算：﹣．考点：实数的运算．专题：计算题．分析：原式利用平方根及立方根的定义化简，即可得到结果．解答：解：原式=﹣﹣=2﹣2=0．点评：此题考查了实数的运算，平方根，以及立方根，熟练掌握运算法则是解本题的关键．。
【3套打包】武汉实验外国语学校初中部七年级下册数学期中考试题(1)
人教版数学七年级下册期中考试试题(答案)一、选择题（本大题10小题，每小题3分，共30分。
每小题给出的四个选项中，只有一个选项是符合题意的，请将该选项的标号填入表格内）1.如图所示的车标，可以看作由“基本图案”经过平移得到的是（ ）A ．B ．C ．D ．2.下列各式中,正确的是( )A.±34B.34;C.±38±343.在实数5，227，38-， 0，-1.414，2π，36，0.1010010001中，无理数 有（ ）A ．2个B ．3个C ．4个D ．5个4.在直角坐标系中，点P （-2，3）向右平移3个单位长度后的坐标为( ) A ．（3，6） B. (1,6) C. (3,3) D. (1,3)5.如图，点E 在AC 的延长线上，下列条件中不能判断AC ∥BD 的是（ ）A. ∠3=∠4B. ∠D=∠DCEC. ∠1=∠2D. ∠D+∠ACD=180°6.下列命题是假命题的是（ ）A. 等角的补角相等B. 两直线平行，同旁内角相等C. 平行于同一条直线的两直线平行D. 同位角相等，两直线平行7.如图，在数轴上标注了四段范围，则表示8的点落在( )A ．段①B ．段②C ．段③D ．段④8．点P 位于x 轴下方，y 轴左侧，距离x 轴4个单位长度，距离y 轴2个单位 长度，那么点P 的坐标是（ ）A.（4，2）B.（-2，-4）C.（-4，-2）D.（2，4） 9. 如图所示，将含有30°角的三角板的直角顶点放在相互平行的两条直线其中一条上. 若∠1=35°，则∠2的度数为（ ） A. 10° B. 15° C. 25° D. 35°10. 在平面直角坐标系中，线段CF 是由线段AB 平移得到的；点A （-1，4）的对应点为C （4，1）；则点B （a ，b ）的对应点F 的坐标为（ ）A.（a+3，b+5）B.（a+5，b+3）C.（a-5，b+3）D.（a+5，b-3）二.填空题（共8小题，每小题3分，共24分）11.在同一平面内，两条直线有 种位置关系，它们是 .12. 94 的算术平方根是 ，38- 的相反数是 ________；16的平方根是 ．13. 在平面直角坐标系中，点P （-2，3）在第_______象限，关于原点对称点坐标是 .14.如图所示，想在河的两岸搭建一座桥，搭建方式最短的是PM ，理由是 ．15.把命题“对顶角相等”改写成“如果……那么……”的形式是 .16.第四象限内的点P （x,y ）满足│x │=7,y 2=9,则点P 的坐标是 . 17.已知x 、y 为实数，且+（y+2）2=0，y x = . .18.如图, 长方形ABCD 中, AB=3, BC=4, 则图中五个小长方形的周长之和为 ．三.画图题（满分6分）19. （6分）如图，∠BAC 是钝角。
湖北省武汉市外国语学校2019-2020学年七年级下学期数学期中考试试卷及参考答案
22. 平面直角坐标系中，已知点A（2，0），B（0，3），点P（m，n）为第三象限内一点，若DPAB的面积为18，则
m，n满足的数量关系式为________.
23. 对于实数a，我们规定：用符号 表示不大于 的最大整数，称为a的根整数，例如：
，如
果我们对a连续求根整数，直到结果为1为止.例如：对10连续求根整数2次：
三、解答题
25. 计算. （1） 解方程： （2） 计算： （3） 解二元一次方程组：
①
②
26. 在平面直角坐标系中，△ABC的三个顶点的位置如图所示.现将△ABC平移，使得点A移至图中的点A'的位置.
（1） 平移后所得△A¢B¢C¢的顶点B¢的坐标为________，C¢的坐标为________； （2） 平移过程中△ABC扫过的面积为________； （3） 将直线AB以每秒1个单位长度的速度向右平移，则平移________秒时该直线恰好经过点C¢.
5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25.
26. 27.
28.
，则
（）
A . 100° B . 150° C . 110° D . 105°
4. 已知命题A：“若a为实数，则
”.在下列选项中，可以作为“命题A是假命题”的反例的是（ ）
A . a＝1 B . a＝0 C . a＝﹣1﹣k（k为实数） D . a＝﹣1﹣k2（k为实数）
5. 若两个角的两边分别平行，而其中一个角比另一个角的3倍少40°，那么这两个角的度数是（ ）
14. 已知AB∥x轴，A（-2，4），AB=5，则B点横纵坐标之和为________. 15. 有下列命题：①无理数是无限不循环小数；②平方根与立方根相等的数有1和0；③若a⊥b，b⊥c，则a⊥c；④邻 补角是互补的角；⑤无理数包括正无理数、零、负无理数.其中正确的有________个.
湖北省武汉市七年级下学期英语期中试卷(含答案)
湖北省武汉市七年级下学期英语期中试卷阅卷人一、选择填空。
从题中所给的ABCD四个选项中，选出一个最佳答案。
（共15小题,每小题1分,满分15分）得分1．—Don't eat in the library!—________.A．OK,I will B．Sorry,I won'tC．I don't think so D．I'm afraid not2．—Does the soup________nice?—Yes,it's hot,but really delicious.A．sound B．smell C．taste D．look3．—What does your father often do after dinner?—He often________after supper.But now,he________.A．reading newspapers;listening to music B．reads newspapers;listens to musicC．reads newspapers;is listening to music D．is reading newspapers;listens to music 4．—Thanks a lot for your help with my English!—________.A．It doesn't matter B．With pleasureC．My pleasure D．OK5．—How do you like your new job at school?—Terrible!I find it hard to keep the________kids quiet in class.A．smart B．noisy C．afraid D．funny6．—Why are you late,Tom?—My dad drives me to school every day,but today his car doesn't________.A．work B．walk C．arrive D．drive7．—Are all these girls from Wuhan?—No,only ten of them are.________are from________cities.A．Others;other B．The other;anotherC．The others;another D．The others;other8．—I enjoy myself reading in this________afternoon.—That sounds relaxing.A．terrible B．slow C．lazy D．busy 9．—Bob,can you give me a________back to my school?—Sure,get into the car,please.A．minute B．stop C．ride D．way10．—May I drink the milk,Mum?—Wait a moment,honey!You________make sure it isn't too hot first.A．can B．must C．may D．will 11．—Students sit too long in front of the computer,so more and more kids are near—sighted.—They should do eye________and take________every day.A．exercises;exercise B．exercises;exercisesC．exercise;exercise D．exercise;exercises12．—I hear Jim joins the chess club,does he like playing chess?—Yes,he______great interest in it after he comes to China.A．saves B．shows C．draws D．pays13．—Do you often go to the library to read a newspaper on weekends?—Yes,and we go there________on Saturday________on Sunday.A．neither;nor B．between;andC．either;or D．from;to14．—The doctor says I smoke too much.Now I'm trying to___________on cigarettes.—Really?Then I should learn from you.A．cut off B．cut down C．cut out D．cut in 15．—Excuse me,can you tell me________?—Oh,it's at3：00p.m..A．when is Lily's birthday party B．how I can get to the zooC．what time the P.E.class is D．why does he learn Chinese Kungfu阅卷人二、完形填空。
2020年湖北省武汉市七年级(下)期中英语试卷 (2)精选全文
精选全文完整版（可编辑修改）七年级（下）期中英语试卷·一、单选题（本大题共15小题，共15.0分）1.-Hi， Tim! Can Tony play ______ drums？2.-No， he can't． He can play ______ chess．（）A. /； /B. the； theC. the； /D. /； the3.Miss Smith is good music， and she is good children in the musicclub．（）A. at， withB. for， atC. with， atD. at， for4.Scott has an interesting ______． But he is very busy． He has much ______to do every day．（）A. work； workB. work； jobC. job； workD. job； job5.$6.This kind of cloth feels ______ and sells ______．A. good；wellB. good；goodC. well；wellD. well；good7.-What ______ animals do you like？8.-I also like pandas because they're lovely．（）A. elseB. the；otherC. otherD. others9.No． 1Middle School is very famous． There are ______ of students and three ______ teachers in this school．（）A. hundred； hundredB. hundreds； hundredsC. hundred； hundredsD. hundreds； hundred10.-______ is it from your school to your home？11.-About ten ______ walk．（）A. How long； minutes'B. How far； minutes'C. How many； minute'sD. How much； minute's12.-13.Amy， a ______ girl， goes to school ______ bike every day．（）A. seven-year-old； onB. seven-year-old； byC. seven years old； inD. seven years old； on14.______ ；coffee ；with ；me ；after ；school ；today，；please．；I ；have ；something ；important ；______ ；you．（）A. Drinking；；to ；tellB. Drink；；tellC. To ；drink；；tellingD. Drink；；to ；tell15.-Don't be late for class．This is very important．16.-OK!We ______ be on time．（）A. canB. mustC. mayD. could17.-Do you like tigers？18.-Yes， I like them ______．（）A. a lot ofB. a lotC. lots ofD. many19.{20.Look! ；Jack ；and ；his ；friends ；______ ；on ；the ；playground．（）A. is ；playingB. are ；playingC. playingD. play21.—Let's go to the movies this Saturday.22.—______.A. That's all rightB. You're rightC. That sounds goodD. No, I can't23.Tom's ；family ；______ ；big．；There ；are ；8people．；His ；family ；______ ；supper ；at ；home ；now．（）A. is；；is ；eatingB. is；；are ；eatingC. are；；is ；eatingD. are；；are ；eating24.The old man doesn't know ______．（）A. where is the post officeB. how can he get to the post officeC. how long does it take to get to the post officeD. if there is a post office near here—二、阅读理解（本大题共15小题，共30.0分）ASUNNY SCHOOLWe are a bilingual（双语）school for children of 6-15．We want a cook，a library assistant，a sports coach and a language teacher．25.Who can't go to Sunny School？______A. A four-year-old child．B. An eleven-year-old boy．C. A fifteen-year-old girlD. An eight-year-old kid．26.Who is not wanted by Sunny School？______A. A PE teacher．B. An English teaher．C. A library assistantD. A math teacher．27.：28.We know ______ may not speak English in Sunny School．A. the sportscoachB. the cookC. the library assistantD. the language teacher29.The coach must major in ______ ．A. ChineseB. EnglishC. foodD. P．E.30.The Sunny School wants a teacher ______ ．A. aged between 25and 40B. who can cook Western foodC. who is careful and strongD. who can speak English and Chinese．BJosh and Amy are like many teenagers these days．They have jobs to do to help out around the home．Josh washes cars for his neighbors while Amy helps their neighbor's kids with their homework．Like many families，both of Josh and Amy's parents work outside the home．Everyone in Josh and Amy's family is busy．Their mom works in an office and often has to stay late for meetings．Their father owns his own small business and stays late to finish his work．Josh and Amy go to school．Both belong to clubs and sports teams．They also have lots of friends with whom they want to spend time．Josh and Amy's mom leaves for work at 7：00in the morning and does not get home most days until 6：30pm．The same is true for their dad，but he leaves home in the morning even earlier．Josh and Amy's parents work to be able to provide for their family．They need money to pay for their home and to pay their bills．Next year they want to buy a new car．The family also wants to go on a vacation to California．Josh and Amy need clothes，books，and other things for school．Their parents are also saving money so Josh and Amy can go to college when they finish high school．31.）32.How many people are there in the family？______A. One．B. Two．C. Three．D. Four．33.What does the father do？______A. Work in an office．B. Run his own business．C. Plan vacations to California．D. Drive kids to school．34.What do the kids do to help their parents？______A. Take part-time jobs．B. Join clubs and sports teams．C. Spend time with their friends．D. Go to school early．35.Where do the parents spend most of their daytime？______A. At home．B. At workplace．C. In their kids'school．D. On business trips．36.$37.What's the best title for this passage？______A. Lovely kidsB. Hard-working parentsC. Family wishesD. A busy family．CTyler walks back home with his schoolbag．He doesn't look happy．His mother asks，"Why are you sad，son？""I am thinking about my science homework．""What's it？""In my science class，Miss Green，our science teacher，tells us about Earth Day（地球日）and our environment（环境）．She wants us to think up some ideas to help the earth．But what can I do？How can I do it？I am only a student．" "Sure，you can't do big things，" Tyler's mother says．"But you can do small things．You can help clean the leaves on the city streets．You can write articles about Earth Day for newspapers and magazines to tell more people about it．You can also work as a cleaner on Earth Day．""Great! Now I know that small things can also be helpful（有帮助的）．"38.How is Tyler when he comes back home？______A. He is sad．B. He is happy．C. He is surprised．D. He is excited．39.What is Tyler's homework about？______A. English．B. Chinese．C. Science．D. Math．40.@41.Who is Miss Green？______A. Tyler's mother．B. Tyler's teacher．C. Tyler's sister．D. Tyler's friend．42.What can Tyler do to help the earth according to（根据）his mother？______A. Clean the leaves on the city streets．B. Write articles about Earth Day for newspapers．C. Work as a cleaner on Earth Day．D. All of the above．43.What is the best title（标题）for the article？______A. How to Help the EarthB. Tyler's Science HomeworkC. I am Only a StudentD. Do Small Things to Help the Earth三、完形填空（本大题共15小题，共15.0分）In many English homes people eat (31) meals a day：breakfast，lunch，tea and dinner．They have breakfast at any time (32) seven to nine in the morning．They (33) tea or coffee or eat bread or eggs．(34)comes at oneo'clock in the afternoon．Afternoon tea is from four to five in the afternoon，and (35) is about 7：30．First they have soup，then they have meat（肉）or fish with vegetables．After that they eat some other things，like bananas，apples or oranges．But not all English people eat like that．Some of them have their dinner in the middle of the day．Their meals are breakfast，dinner，tea and these meals are very simple（简单）．44.|45. A. two B. three C. four D. five46. A. to B. on C. from D. between47. A. drink B. drinks C. cook D. eat48. A. Breakfast B. Lunch C. Supper D. Tea49. A. lunch B. tea C. dinner D. mealA woman has a red car．She drives to work every day．She usually parks her car in the street (36) her office．Yesterday after work，she got into her car and started (37) home．Suddenly，she noticed a yellow van（货车）at her back．The (38) was a man．When she turned left，the yellow van turnedleft．When she turned right，the yellow van turned right．When she stopped at the traffic lights，the yellow van stopped (39) her．She was afraid，so she drove quickly to the (40)．She was very surprised when she saw the van (41) behind her．At that time，I was standing outside the police station．The woman was very (42) to see me．She knew that I was a policeman because I was wearing a police uniform．She (43) out of her car quickly and ran to me．She asked me to (44) the man inside the van，so I walked towards the man．The man didn't run away when he saw me．He just smiled and said to the woman，"I want to (45) this purse（钱夹）back to you，madam．I think you dropped it on the street．"50. A. inside B. outside C. in front D. next51. A. walking B. riding C. running D. driving52.#53. A. doctor B. cook C. driver D. police54. A. behind B. in front of C. over D. before55. A. school B. home56.C. supermarket D. police station57. A. stop B. stopped C. stops D. stopping58. A. surprised B. happy C. afraid D. tired59. A. walks B. takes C. runs D. jumps60. A. drive B. talk C. catch D. push61. A. borrow B. lend C. get D. give}四、阅读填空（本大题共1小题，共10.0分）62."Come here，John!" says the mother，"Give me your school report（成绩单）．" John gives it to his mother．63."Oh，you fail again，" says his mother，"You aren't good at your l(1) ．Why not s (2) hard at school？"64."I'm s (3) ，Mum，" says John，"I'll do well in my lessons a (4) you buy mea computer!"65."Really？" asks the mother．"Yes，" answers John，"My teacher says thatcomputer m (5) people clever．"66."A (6) right，" says the mother，"Let's go to the shop and b (7) one．" Whenthey come into the shop，the girl in the shop asks，"Can I help you？"67."Yes，p (8) ，" answers the mother，"I'd like to have a look at yourcomputers．" "There are d (9) kinds of computers，" says the girl，"What kind of computer do you like，madam？"68.John looks at the computers and asks，"Do you have a computer that cando h (10) for me？" The mother looks at him angrily．五、书面表达（本大题共2小题，共30.0分）69.阅读下面5个句子，然后用方框中所给单词或短语填空，使每个句子在结构和意义上正确．（提示：选项中有一个是多余的．）70.arrive / terrible / think of / think about / friendly / remember71.（1）The students in our school are______ to each other． We are like a big fami ly．72.（2）The teacher often tells us not to______ late for class．73.（3）The weather in winter is______ in Wuhan．74.（4）______ to close the door when you leave home．75.（5）We are not little children now， we should______ our future（未来） now．76.根据以下信息，用英语写一篇介绍Peter 的短文．要点如下：77.1． Peter 是一名14岁的学生．会打排球、弹吉他．他想加入音乐俱乐部．78.2． Peter 喜欢动物，认为狗很友好、聪明，熊猫很可爱．79.3．每天早上6：30起床，搭公汽上学，通常要花半小时．80.4．这儿有一张他的照片．看，他和弟弟正在用电脑，妈妈在厨房做晚餐，爸爸在看报纸．这是幸福的一家人．答案和解析1.【答案】C【解析】考查冠词．句意"--嗨，提姆！托尼会打鼓吗？--不，他不会．他会下棋"．第一个空，play+某种乐器，中间加定冠词the．第二个空，play+某种棋类中间不加冠词．故选：C．--嗨，提姆！托尼会打鼓吗？--不，他不会．他会下棋．考查冠词，冠词包括定冠词the，通常表示特指．不定冠词a和an，a修饰以辅音音素开头的单词，an修饰以元音音素开头的单词．要根据语境完成试题．2.【答案】A|【解析】be good at擅长，be good with sb．对某人好，be good for对…有好处；根据句意"史密斯小姐擅长音乐，并且她对音乐俱乐部里的孩子们非常好．"可知，要填at，with，其它选项语意不通．故选：A．史密斯小姐擅长音乐，并且她对音乐俱乐部里的孩子们非常好．考查动词短语，要牢记动词短语的词意及用法，进行比较分析，选择正确答案．3.【答案】C【解析】考查同义词．work工作，不可数名词．job工作，可数名词．句意"Scott有一份有趣的工作．但是他很忙．他每天都有很多工作要做"．第一个空，an修饰可数名词单数job．第二个空，much修饰不可数名词work．Scott有一份有趣的工作．但是他很忙．他每天都有很多工作要做．考查job和work的用法，前者是可数名词．后者是不可数名词．结合语境，选择合适答案．4.【答案】A【解析】句意：这种布感觉很好，并且卖得很好。
湖北武汉外国语学校七年级下期中考试试卷
1．平面直角坐系中，点P（x，y）在第三象限，且P到x轴、y轴的距离分别为3、7，则P点坐标为（）2．如图，方格纸上有B、A两点，若以点B为原点，建立平面直角坐标系，则点A坐标为（3，4），若以A 为原点建立平面直角坐标系，则点B的坐标为（）3．下列命题正确的是（）A．如果两个角相等，那么这两个角是对顶角B．直线外一点和直线上的点连线中，垂线最短C．平面内，经过一点有且只有一条直线与已知直线平行D．平面内，经过一点有且只有一条直线与已知直线垂直。
4．如图，把一个长方形纸片沿EF折叠后，点D、C分别落在'D、'C的位置，若∠EFB = 65°，则∠AE'D 等于（）A．50° B．55° C．60° D．65°C5.在综合实践活动课上，小红准备用两种不同颜色的布料缝制一个正方形座垫，座垫的图案如右所示，应该选左图中的哪一块布料才能使其与右图拼接符合原来的图案模式（）A． B． C． D．6．四个电子宠物排座位，一开始，小鼠、小猴、小兔、小猫分别坐在1、2、3、4号座位上（如图所示），以后它们不停地变换位置，第一次上下两排交换，第二次是在第一次换位后，再左右两列交换位置，第三次上下两排交换，第四次再左右两列交换……这样一直下去，则第2005次交换位置后，小兔子坐在（）号位上。
4321猫兔猴鼠猫兔猴鼠猫兔猴鼠→→…A．1 B．2 C．3 D．413．写出三个满足横纵坐标之积为 4的点的坐标：。
7．要把图中的三条线段组成三角形，可将线段MN先向右平移格，再向下平移格。
8．根据下面的镶嵌填空：①在图中，是用两种正多边形进行的镶嵌，在每一个顶点处，有 个正三角形， 个正方形。
②中山公园的地面要铺成这样的图案，要购买正三角形与正方形地板砖，在确定购买数量时，应使正三角形与正方形的块数之比为 时，才能既减少浪费，又能铺好地面。
ECBAD（第16题图） （第18题图）9．周日，小华做作业时，把老师布置的一个正方形忘了画下来，打电话给小云，小云在电话中答复他：“你可以这样画，正方形ABCD 的顶点A 、B 、C 的坐标分别是（1，2）、（-2，2）、（-2，-1），顶点D 的坐标你自己想吧！”那么顶点D 的坐标是 。
湖北省武汉外校 RJ人教版 初一七年级英语 下册第二学期(期中考试)教学质量检测监测调研 统联考真题模拟卷
七年级英语试题II. Multiple Choice. (1×15’)26. —I came first in the long jump.—______. I’m so proud of you.A. Good luckB. Have funC. Well doneD. You’re joking27. —Daddy, can you come home for supper with us this weekend?—______, but I might be a little late.A. I’m busyB. Hard to sayC. Of courseD. Never mind28. Look! The boy ______ blue jeans ______ a bicycle.A. in; is ridingB. in; rideC. on; ridingD. on; is riding29. How many ______ are there in the box?A. packets of sweetB. packet of sweetC. packet of sweetsD. packets of sweets30. —Can I have 450 grams of cheese?—I’m sorry, but there ______ cheese.A. isn’t anyB. aren’t anyC. isn’t someD. aren’t some31. Miss Grey always ______ her car to school, but now she ______ to school.A. drive; walkB. drives; walksC. is driving; is walkingD. drives; is walking32. The International Convention Centre is the ______ for a three-day arts festival.A. ceremonyB. venueC. restaurantD. graveyard33. —What if I tell the host family about the food problem?—You’d better not. You will appear as a _____ person.A. fussyB. unhealthyC. horribleD. friendly34. —What would you like to eat, sir?—Just a minute. Let me see what is on the ______ today first.A. orderB. listC. menuD. bill35. —That is ______, and we cannot be sure about changes in the future.—Yes, I can’t help worrying about it.A. excitingB. fancyC. scaryD. interesting36. Their daily diet consists of a ______ of bread, a ______ of rice and water.A. slice; bowlB. bar; pieceC. bunch; glassD. slice; cup37. —Shall we meet at the school gate at 9 o’clock ______ Saturday morning?—Fine. See you then.A. inB. onC. atD. /38. —______ do you eat take-away food?—About 3 times a week.A. WhenB. How manyC. How oftenD. What date39. In the US, we have a tradition that when you ______ the candles on your birthday cake, you should make a wish.A. turn offB. take offC. put outD. blow out40. The company ______ some coffee ______ the guests every morning, but sometimes they turn it down.A. offers; forB. provides; withC. offers; toD. provides; toIII. Close Test (1’×10)These days, many people enjoy riding bikes. But there is a lot to 41 before you buy a bike. There are many kinds of bikes. That’s why it is often good to ask a(n) 42 before you buy a bike.Different bikes are made to do different things. If you want a bike, you need to get the right kind of bike. First, ask 43 where you plan to ride it. On city streets? On mountain roads? Or both? When you decide, you can 44 the bike for your needs. Next, be sure you get the right 45 of bike for you. Professional bike stores will take time to measure (量…...的尺寸大小) you. Then they will put the measurements 46 a computer. The computer will tell you a good size.You 47 need to choose other things like handlebars (把手) and a seat. And finally, you need to know 48 to ride the bike. You need to sit in a right way. You should be 49 when you ride the bike. A professional in a bike store can 50 you with these things. Then you will be ready to hit the road.41. A. think about B. hear from C. fall down D. make up42. A. teenager B. cook C. expert D. teacher43. A. myself B. yourself C. himself D. herself44. A. forget B. send C. bring D. choose45. A. size B. price C. service D. guide46. A. for B. of C. in D. as47. A. again B. also C. once D. already48. A. how B. why C. when D. where49. A. small B. angry C. traditional D. comfortable50. A. trust B. help C. mix D. useIV. Reading Comprehension.(2’x15)51. What does Jan Lee want to do?A. To paint the art room.B. To start a science fair.C. To visit Mr. Wayne’s class.D. To take care of the school’s garden.52.Which of the following is TRUE according to the material?A. Mr. King needs some yarn.B. School will be closed on March 16.C. There was a singing competition in Mr. Wayne’s class.D. Mrs. Mohan’s class will go to North Park Zoo by bike.53. This material is probably from ______.A. a guidebookB. a school notice boardC. a storybookD. an education magazineBThe best thing for me is my dog, Jasper. He’s a black Labrador and he’s great. I got him when I was nine. And we’ve grown up together. My uncle gave him to me for my ninth birthday. He is very cute.Ben There are lots of things I like that don’t cost anything. Let’s see….sunsets. My house is on a hill, and in the evening, there’s sometimes a beautiful sunset. It makes washing the dishes more interesting! I also love getting cards from my family. But the best thing is my son. He’s the most beautiful baby boy I’ve ever seen!MaryI think the best thing for me is playing with my little sister. Abby. She’s almost four, and I’m much older than her. I’ve also got a brother, Dominic. He’s six. But he doesn’t like the games I like, so he isn’t as much fun to play with. Abby’s always waiting for me when I come home from school. She thinks I’m the best person in the world.Laura54. Who gave Ben a dog for his 9th birthday?A. His mother.B. His father.C. His aunt.D. His uncle.55. What can we know about Mary?A. She has a lovely baby daughter.B. She enjoys a beautiful sunset every day.C. She enjoys getting cards from her family.D. She hardly ever washes the dishes at home.56. Laura thinks playing with her sister is _______.A. tiringB. interestingC. boringD. relaxingCHi Sophie,How are you? I’m fine. I hope you’re OK as well. The weather in London is great, and I’m living in a really cosy (舒适的) house with people from different countries. My best friend is called Izabela. She’s Polish and she came here five years ago. She’s a really nice person. Whenever I have a problem, she’s always there to help me. From time to time, we go out to the cinema or watch or watch a DVD together. At first, there was a bit of friction over cleaning the house. It was my fault (过错). You know, I really hate doing housework! Anyway, we solved that problem and we now get along fine. I really enjoy spending time with her. She is such a warm-hearted person.I have made a lot of friends here. In the evenings I often have people round for a meal and I like to cook them Korean food. Last night I cooked Korean noodles for some Italian friends, it was so spicy (辣的) for them that they almost cried; it was really funny! After dinner, we had a heart-to- heart talk about our dreams. It was quite an enjoyable night! I’ve also met a lovely South African man called Munyani. We sometimes go out to a library or a museum; we have a great time together. Some of my friends are going back to their countries soon, and we’ll keep in touch by email.Next month I’m going on holiday to Italy with a Japanese friend. I’ll tell you all about it when I’m back in Korea. I can’t wait to see you. I miss you so much.All for now-write back soon!57. From the letter, we can know that Izabela ______.A. is nice and helpfulB. is one of Jina’s classmatesC. went to Poland five years agoD. hated watching movies before58. What does the underlined word “friction” mean in Chinese?A. 培训B. 研究C. 摩擦D. 沟通59. How did Jina feel last night?A. Bored.B. Happy.C. Shocked.D. Luckily.60. What does Jina mainly talk about in the letter?A. What her life is like in London.B. Why she loves to stay in London.C. How she gets on with her roommates.D. What her plan is for the coming holiday.DA traveler was once staying in a village of another country. One day, she held up her camera to take pictures of the children at play. Suddenly the young ones began to shout.The traveler’s face turned red and she said sorry to the head for what she was doing, and told him she had forgotten that people in some places thought a person would lose his soul (灵魂) if his picture was taken. She explained (解释) to him the operation of a camera for a long time. Several times the head tried to say something, but he couldn’t.When she was sure she had put the head’s fear (害怕) to rest, the traveler then let him speak. With a smile, he said, “The children were trying to tell you that you forgot to take off the cap (镜头盖)!”61. The children shouted when the traveler was taking pictures of them because ______.A. they didn’t want the traveler to take any picturesB. the traveler was not doing well with her cameraC. the traveler would take their souls at onceD. the traveler forgot to take off the cap from her head62. The traveler said sorry to the head because ______.A. she had stayed in the village too longB. the children thought they would lose their camerasC. she thought the children were afraid of being taken photosD. she didn’t take a picture of the head first63. The traveler explained how to use a camera to the head because ______.A. the head wanted to learn how to take picturesB. She was afraid of the headC. She wanted the head not to worry about what she was doingD. The head was very interested in her camera64. When the head smiled, it was clear that ______.A. the traveler didn’t let him speakB. the children wanted to play with herC. he wanted the traveler to tell him the truthD. the traveler didn’t know what the children meant65. Which of the following is NOT true?A. The children wouldn’t mind if the traveler took pictures of them.B. The traveler didn’t understand why the children shouted at first.C. The traveler knew something about people in some countries.D. The head was afraid that the traveler took pictures of the children at play.Part Two (共40分)V. Spot Dictation. (1’×5)Mario Green and Mary Brown from Riverside High School (66) several hours each week to help others.Mario loves animals and wants to be an animal (67). He volunteers at an animal hospital every Saturday morning. Mario believes it can help him to get his (68) dream job. “it’s hard work,” he says, “but I want to learn more about how to care for animals. I get such a strong (69) of satisfaction when I see the animals get better and the look of joy on their owners faces.”Marie is a book lover, she could read by herself at the age of four. Last year, she decided to try out for a volunteer after-school reading program. She still works there once a week to help kids learn to read. “The kids are sitting in the library, but you can see it in their eyes they’re going on a different journey with each new book. (70) here is a dream come true for me. I can do what ii love to do and help others at the same time.”66. ______ 67. _______ 68. ______ 69. _______ 70. _______VI. Match the words with their definitions. (1’×5)( ) 71. treatment A. the subject matter of a conversation or discussion( ) 72. telescope B. allowing different choices( ) 73. alternative C. a person related by blood or marriage( ) 74. theme D. medical attention given to a sick or injured person or animal( ) 75. relative E. an instrument with lenses that makes distant things larger and nearer when you look throughVII. Fill in the blanks according to the texts. (1’×5)76. —Let’s take the ______ off the wheel.—Put the tube in this basin, Sandy.77. Now they’re eating sandwiches, cakes and ______. They’re drinking lemonade, too.78. Inside the hotel, there are two bedrooms, and a dining room for the ______.79. However, most ______ eat eggs, cheese and other dairy products, but vegans don’t.80. However, most doctors believe that fruitarians do not have a ______ diet.VIII. Fill in the blanks with the correct forms of the words given. (1’×10)81. —I am crazy about chocolate.—You’d better eat less. As we all know, chocolate is ______ (rat).82. The Prime Minister of UK, has accepted an ______ (invite) to visit the White House in June.83. Look! The boys ______ (clean) their classroom. Let’s clean ______ (we).84. The first train ______ (leave) for London at 5 a.m. every day in Winter.85. Le t’s ______ (stop) talking about the holiday and get down to study right now.86. —He has a (an) ______ (health) diet and he doesn’t exercise at all.—That’s why he is fat.87. Every December, our family go to Oxford Street to buy some gifts and some Christmas. (decorate)88. That couple always holds a little ______ (celebrate) every year on their wedding anniversary.89. They might look ______ (taste) but you probably wouldn’t want one of these on your toast in the morning.IX. Complete the sentences with correct words. The first letters have been given to you. (1’×5) 90. —Some children find it difficult to talk to a______.—I think children and their parents need a good way to communicate and know each other.91. If a couple has got everything when they get m_____, what should they expect in the future?92. It’s still p_____ for her to talk about the terrible accident. It is very difficult and unpleasant for her.93. If you are lucky to have a f______ ticket for the theater, you can enjoy the play without paying for it.94. I’m totally c______ Could you explain that again?X. Sentence Patterns. (1’×10)95. There are some spoons on the table. (Change the sentences into interrogatives)96. I’d like some bread and juice for breakfast. (Change the sentences into interrogatives)97. Close the windows when you leave the classroom. (Change the sentences into interrogatives)98. There is going to be football match next week. (Change the sentences into interrogatives)99. Jenny usually spends ￡80 at weekends. (Ask a question to the underlined part)100. James and Rosie are both from Ireland. (Ask a question to the underlined part)101. He shouldn’t 101. He shouldn’t excise too much. (Ask a question to the underlined part) 102. I can see a boy. He is playing basketball in the playground. (Join the two into one)103. Why not discover what you enjoy and do that? (Say it in another way)104. Bring me an old shirt to protect my clothes. (Say it in another way)。
2020-2021武汉实验外国语学校初中部初一数学下期中模拟试题(附答案)
2020-2021武汉实验外国语学校初中部初一数学下期中模拟试题(附答案)一、选择题1．如图，已知∠1=∠2，其中能判定AB ∥CD 的是（ ）A ．B ．C ．D ．2．如图，将△ABC 沿直线AB 向右平移后到达△BDE 的位置，若∠CAB=50º，∠ABC=100º，则∠CBE 的度数为（ ）A ．45°B ．30°C ．20°D ．15°3．若点(),P a b 在第四象限，则（ ）A ．0a >，0b >B ．0a <，0b <C ．0a <，0b >D ．0a >，0b <4．如图所示的是天安门周围的景点分布示意图．若以正东、正北方向为x 轴、y 轴的正方向建立坐标系，表示电报大楼的点的坐标为(－4，0)，表示王府井的点的坐标为(3，2)，则表示博物馆的点的坐标为( )A ．(1，0)B ．(2，0)C ．(1，－2)D ．(1，－1)5．为了了解天鹅湖校区2019-2020学年1600名七年级学生的体重情况，从中抽取了100名学生的体重，就这个问题，下面说法正确的是（ ）A ．1600名学生的体重是总体B ．1600名学生是总体C ．每个学生是个体D ．100名学生是所抽取的一个样本6．下列语句中，假命题的是（ ）A ．对顶角相等B ．若直线a 、b 、c 满足b ∥a ，c ∥a ，那么b ∥cC．两直线平行，同旁内角互补D．互补的角是邻补角7．点P为直线m外一点,点A,B,C为直线m上三点,PA=4cm,PB=5cm,PC=2cm,则点P到直线m的距离为( )A．4cm B．2cm;C．小于2cm D．不大于2cm8．下列四个说法：①两点之间，线段最短；②连接两点之间的线段叫做这两点间的距离；③经过直线外一点，有且只有一条直线与这条直线平行；④直线外一点与这条直线上各点连接的所有线段中，垂线段最短.其中正确的个数有（）A．1个B．2个C．3个D．4个9．如图，下列能判断AB∥CD的条件有（）①∠B+∠BCD=180°②∠1 = ∠2 ③∠3 =∠4 ④∠B = ∠5A．1B．2C．3D．410．如图，△ABC经平移得到△EFB，则下列说法正确的有（）①线段AC的对应线段是线段EB；②点C的对应点是点B；③AC∥EB；④平移的距离等于线段BF的长度．A．1B．2C．3D．411．如图，AB∥CD，EF平分∠GED，∠1=50°，则∠2=（）A．50°B．60°C．65°D．70°12．在平面直角坐标系中,点P(1,-2)在（）A．第一象限B．第二象限C．第三象限D．第四象限二、填空题13．若一个数的平方等于5，则这个数等于_____．14．如图，AB ∥CD ，∠1＝64°，FG 平分∠EFD ，则∠2＝_____度．15．如图，已知AB CD ∥，120ABE ∠=︒，35DCE ∠=︒，则BEC ∠=__________．16．已知点P （x+3，x ﹣4）在x 轴上，则x 的值为_____________ ．17．比较大小：－2____－3，5____2.18．根据不等式的基本性质，可将“mx ＜2”化为“x ＞2m”，则m 的取值范围是_____. 19．将命题“对顶角相等”用“如果……那么……”的形式可以改写为______． 20．若关于x 、y 的二元一次方程组2133x y m x y -=+⎧⎨+=⎩的解满足x ＋y ＞0，则m 的取值范围是____．三、解答题21．某商场购进甲,乙两种服装后，都加价50％标价出售．春节期间，商场搞优惠促销，决定将甲，乙两种服装分别按标价的七折和八折出售．某顾客购买甲，乙两种服装共付款186元，两种服装标价和为240元．问：这两种服装打折之后售出的利润是多少元？22．已知方程组71ax by x y +=⎧⎨-=⎩和53ax by x y -=⎧⎨+=⎩的解相同，求a 和b 的值. 23．如图，∠1=70°，∠2=110°，∠C=∠D ，试探索∠A 与∠F 有怎样的数量关系，并说明理由．24．求不等式()()922312m m ---≥-的所有正整数解.25．某公交公司有A，B型两种客车，它们的载客量分别为45人/辆和30人/辆和租金分比为400元/辆和280元/辆：杏坛中学根据实际情况，计划租用A，B型客车共5辆，同时送八年级师生到基地参加社会实践活动，若要保证租车费用不超过1900元，求A型客车的数量最大值．【参考答案】***试卷处理标记，请不要删除一、选择题1．D解析：D【解析】【分析】由∠1=∠2结合“内错角（同位角）相等，两直线平行”得出两平行的直线，由此即可得出结论．【详解】A、∵∠1=∠2，∴AD∥BC（内错角相等，两直线平行）；B、∵∠1=∠2，∠1、∠2不是同位角和内错角，∴不能得出两直线平行；C、∠1=∠2，∠1、∠2不是同位角和内错角，∴不能得出两直线平行；D、∵∠1=∠2，∴AB∥CD（同位角相等，两直线平行）．故选D．【点睛】本题考查了平行线的判定，解题的关键是根据相等的角得出平行的直线．本题属于基础题，难度不大，解决该题型题目时，根据相等（或互补）的角，找出平行的直线是关键．2．B解析：B【解析】【分析】根据平移的性质得出AC∥BE，以及∠CAB=∠EBD=50°，∠ABC=100º，进而求出∠CBE 的度数．【详解】解：∵将△ABC沿直线AB向右平移后到达△BDE的位置，∴AC∥BE，∴∠CAB=∠EBD=50°（两直线平行，同位角相等），∵∠ABC=100°，∴∠CBE的度数为：180°-50°-100°=30°．故选B．【点睛】此题主要考查了平移的性质以及直线平行的性质，得出∠CAB=∠EBD=50°是解决问题的关键．3．D解析：D【解析】【分析】根据第四象限内点的横坐标大于零，纵坐标小于零，可得答案．【详解】由点P（a，b）在第四象限内，得a＞0，b＜0，故选：D．【点睛】此题考查各象限内点的坐标，记住各象限内点的坐标的符号是解题的关键，四个象限的符号特点分别是：第一象限（+，+）；第二象限（-，+）；第三象限（-，-）；第四象限（+，-）．4．D解析：D【解析】【分析】根据平面直角坐标系，找出相应的位置，然后写出坐标即可．【详解】表示电报大楼的点的坐标为（-4，0），表示王府井的点的坐标为（3，2），可得：原点是天安门，所以可得博物馆的点的坐标是（1，-1）故选D．【点睛】此题考查坐标确定位置，本题解题的关键就是确定坐标原点和x，y轴的位置及方向．5．A解析：A【解析】【分析】总体是指考查的对象的全体，个体是总体中的每一个考查的对象，样本是总体中所抽取的一部分个体，而样本容量则是指样本中个体的数目．我们在区分总体、个体、样本、样本容量，这四个概念时，首先找出考查的对象．从而找出总体、个体．再根据被收集数据的这一部分对象找出样本，最后再根据样本确定出样本容量．解：A、1600名学生的体重是总体，故A正确；B、1600名学生的体重是总体，故B错误；C、每个学生的体重是个体，故C错误；D、从中抽取了100名学生的体重是一个样本，故D错误；故选：A．【点睛】本题考查了总体、个体、样本、样本容量，解题要分清具体问题中的总体、个体与样本，关键是明确考查的对象．总体、个体与样本的考查对象是相同的，所不同的是范围的大小．样本容量是样本中包含的个体的数目，不能带单位．6．D解析：D【解析】分析：分别判断是否是假命题.详解：选项A. 对顶角相等 ,正确.选项B. 若直线a、b、c满足b∥a，c∥a，那么b∥c,正确.选项C. 两直线平行，同旁内角互补,正确.选项D. 互补的角是邻补角，错误，不相邻的两个补角不是邻补角.故选D.点睛：（1）真命题就是正确的命题,即如果命题的题设成立,那么结论一定成立.简单来说就是成立的、对的就是真命题.比如太阳是圆的...就是真命题.（2）条件和结果相矛盾的命题是假命题,即不成立的、错的就是假命题.比如太阳是方的...就是假命题7．D解析：D【解析】【分析】根据点到直线的距离是直线外的点与直线上垂足间的线段的长，再根据垂线段最短，可得答案．【详解】当PC⊥l时，PC是点P到直线l的距离，即点P到直线l的距离2cm，当PC不垂直直线l时，点P到直线l的距离小于PC的长，即点P到直线l的距离小于2cm，综上所述：点P到直线l的距离不大于2cm，故选：D．【点睛】考查了点到直线的距离，利用了垂线段最短的性质．8．C解析：C【分析】根据线段公理，两点之间的距离的概念，平行公理，垂线段最短等知识一一判断即可．【详解】解：①两点之间，线段最短，正确．②连接两点之间的线段叫做这两点间的距离，错误，应该是连接两点之间的线段的距离叫做这两点间的距离．③经过直线外一点，有且只有一条直线与这条直线平行，正确．④直线外一点与这条直线上各点连接的所有线段中，垂线段最短．正确．故选C．【点睛】本题考查线段公理，两点之间的距离的概念，平行公理，垂线段最短等知识，解题的关键是熟练掌握基本知识，属于中考常考题型．9．C解析：C【解析】【分析】判断平行的条件有：同位角相等、内错角相等、同旁内角互补，依次判断各选项是否符合．【详解】①∠B+∠BCD=180°，则同旁内角互补，可判断AB∥CD；②∠1 = ∠2，内错角相等，可判断AD∥BC，不可判断AB∥CD；③∠3 =∠4，内错角相等，可判断AB∥CD；④∠B = ∠5，同位角相等，可判断AB∥CD故选：C【点睛】本题考查平行的证明，注意②中，∠1和∠2虽然是内错角关系，但对应的不是AB与CD 这两条直线，故是错误的．10．D解析：D【解析】【分析】根据平移的特点分别判断各选项即可．【详解】∵△ABC经平移得到△EFB∴点A、B、C的对应点分别为E、F、B，②正确∴BE是AC的对应线段，①正确∴AC∥EB，③正确平移距离为对应点连线的长度，即BF的长度，④正确【点睛】本题考查平移的特点，注意，在平移过程中，一定要把握住对应点，仅对应点的连线之间才有平行、相等的一些关系．11．C解析：C【解析】【分析】由平行线性质和角平分线定理即可求.【详解】∵AB∥CD∴∠GEC=∠1=50°∵EF平分∠GED∴∠2=∠GEF= 12∠GED=12(180°-∠GEC)=65°故答案为C.【点睛】本题考查的知识点是平行线性质和角平分线定理，解题关键是熟记角平分线定理. 12．D解析：D【解析】【分析】根据各象限内点的坐标特征解答即可.【详解】∵点P(1,-2),横坐标大于0，纵坐标小于0，∴点P(1,-2)在第三象限,故选D.【点睛】本题考查了象限内点的坐标特征，关键是熟记平面直角坐标系中各个象限内点的坐标符号．二、填空题13．【解析】【分析】根据平方根的定义即可求解【详解】若一个数的平方等于5则这个数等于：故答案为：【点睛】此题主要考查平方根的定义解题的关键是熟知平方根的性质解析：【解析】【分析】根据平方根的定义即可求解.【详解】若一个数的平方等于5，则这个数等于：5±．故答案为：5±．【点睛】此题主要考查平方根的定义，解题的关键是熟知平方根的性质.14．32°【解析】∵AB//CD∴∠EFD=∠1=64°∵FG平分∠EFD∴∠GFD=∠EFD=32°∵AB//CD∴∠2=∠GFB=32°点睛：本题主要考查平行线的性质角平分线的定义熟记平行线的性质是解析：32°【解析】∵AB//CD，∴∠EFD=∠1=64°，∵FG平分∠EFD，∴∠GFD=12∠EFD=32°，∵AB//CD，∴∠2=∠GFB=32°.点睛：本题主要考查平行线的性质、角平分线的定义，熟记平行线的性质是解题的关键. 15．95°【解析】如图作EF∥AB则EF∥CD∴∠ABE+∠BEF=180°∵∠ABE=120°∴∠BEF=60°∵∠DCE=∠FEC=35°∴∠BEC=∠BEF+∠FEC=95°故答案为95°点睛：本解析：95°【解析】如图，作EF∥AB，则EF∥CD，∴∠ABE+∠BEF=180°，∵∠ABE=120°，∴∠BEF=60°，∵∠DCE=∠FEC=35°，∴∠BEC=∠BEF+∠FEC=95°.故答案为95°.点睛：本题关键在于构造平行线，再利用平行线的性质解题.16．x=4【解析】【分析】【详解】解：∵点P(x+3x−4)在x轴上∴x−4=0解得：x= 4故答案为：x=4解析：x=4【解析】【分析】【详解】解：∵点P(x+3，x−4)在x轴上，∴x−4=0，解得：x=4，故答案为：x=4．17．＞＞【解析】【分析】【详解】∵∴；∵5>4∴故答案为(1)＞；(2)＞解析：＞＞【解析】【分析】【详解】<，∴>∵22=5,2=4，5>4,2>.故答案为(1). ＞；(2). ＞.18．m＜0【解析】因为mx＜2化为x＞根据不等式的基本性质3得：m＜0故答案为：m＜0解析：m＜0【解析】因为mx＜2化为x＞2m，根据不等式的基本性质3得：m＜0，故答案为：m＜0．19．如果两个角是对顶角那么这两个角相等【解析】【分析】命题中的条件是两个角相等放在如果的后面结论是这两个角的补角相等应放在那么的后面【详解】题设为：对顶角结论为：相等故写成如果…那么…的形式是：如果两个解析：如果两个角是对顶角，那么这两个角相等【解析】【分析】命题中的条件是两个角相等，放在“如果”的后面，结论是这两个角的补角相等，应放在“那么”的后面．【详解】题设为：对顶角，结论为：相等，故写成“如果…那么…”的形式是：如果两个角是对顶角，那么它们相等，故答案为：如果两个角是对顶角，那么这两个角相等；【点睛】此题考查命题与定理，“如果”后面是命题的条件，“那么”后面是条件的结论，解题的关键是找到相应的条件和结论，比较简单．20．m>-2【解析】【分析】首先解关于x和y的方程组利用m表示出x+y代入x+y＞0即可得到关于m的不等式求得m的范围【详解】解：①+②得2x+2y＝2m+4则x+y ＝m+2根据题意得m+2＞0解得m ＞解析：m >-2【解析】【分析】首先解关于x 和y 的方程组，利用m 表示出x +y ，代入x +y ＞0即可得到关于m 的不等式，求得m 的范围．【详解】解：2133x y m x y -=+⎧⎨+=⎩①②， ①+②得2x +2y ＝2m +4，则x +y ＝m +2，根据题意得m +2＞0，解得m ＞﹣2．故答案是：m ＞﹣2．【点睛】本题考查的是解二元一次方程组和解一元一次不等式，解答此题的关键是把m 当作已知数表示出x +y 的值，再得到关于m 的不等式．三、解答题21．26元．【解析】【分析】通过理解题意，可知本题存在两个等量关系，即甲种服装的标价+乙种服装的标价=240元，甲种服装的标价×0.7+乙种服装的标价×0.8=186元，根据这两个等量关系可列出方程组求出甲、乙服装的进价，用售价减进价即可求出利润．【详解】解：设甲种服装的进价是x 元，乙种服装的进价是y 元．由题意得(150%)(150%)240(150%)0.7(150%)0.8186x y x y +++=⎧⎨+⨯++⨯=⎩解，得40120x y =⎧⎨=⎩186-(40+120)=26（元）答：这两种服装打折之后售出的利润是26元．故答案为26元．【点睛】本题考查了二元一次方程组的应用．解题的关键是弄清题意，找到合适的等量关系，列出方程组，在设未知量时知道到底设哪个更简单，否则较难列出方程．22．31a b =⎧⎨=⎩【解析】【分析】因为两个方程组有相同的解，故只要将两个方程组中不含有a ，b 的两个方程联立，组成新的方程组，求出x 和y 的值，再代入含有a ，b 的两个方程中，解关于a ，b 的方程组即可得出a ，b 的值．【详解】解：依题意得13x y x y -=⎧⎨+=⎩：，解得21x y =⎧⎨=⎩：， 将其分别代入7ax by +=和5ax by -=组成一个二元一次方程组2725a b a b +=⎧⎨-=⎩， 解得：31a b =⎧⎨=⎩． 【点睛】本题考查了方程组的解的定义，正确根据定义转化成解方程组的问题是关键，考查了学生对方程组有公共解定义的理解能力及应用能力，是一道好题．23．见解析【解析】分析：要找∠A 与∠F 的数量关系，根据平行线的判定，由已知可得∠1+∠2=180°，则CE ∥BD ；根据平行线的性质，可得∠C =∠ABD ，结合已知条件，得∠ABD =∠D ，根据平行线的判定，得AC ∥DF ，从而求得结论．详解：∠A =∠F ． 理由如下：∵∠1=70°，∠2=110°，∴∠1+∠2=180°，∴CE ∥DB ，∴∠C =∠ABD ．∵∠C =∠D ，∴∠ABD =∠D ，∴AC ∥DF ，∴∠A =∠F ．点睛：本题主要考查平行线的判定与性质，正确识别“三线八角”中的同位角、内错角、同旁内角是正确答题的关键．24．72m ≤，正整数解123m =、、 【解析】【分析】 去括号、移项、合并同类项、系数化成1即可求得不等式的解集，然后确定解集中的正整数解即可．【详解】解：去括号，得2m-4-3m+3 92≥-移项，得2m-3m ≥4-3- 92，合并同类项，得-m≥-72，系数化为1得72 m≤，则不等式的正整数解为 1，2，3.【点睛】本题考查了一元一次不等式的解法，解不等式的依据是不等式的性质，要注意不等号方向的变化．25．A型客车的数量最大值为4．【解析】【分析】设租用A型客车x辆，则租用B型客车（5−x）辆，租用A型客车租金为400x元，租用的B型客车租金为280（5−x）元，根据租车费用不超过1900元，即可得出关于x的一元一次不等式，解之取其中的最大整数值即可得出结论．【详解】解：设租用A型客车x辆，则租用B型客车（5−x）辆，根据租车费用不超过1900元，得400x+280（5−x）≤1900解不等式，得x≤25 6∵x为正整数，∴x最大值为4答：A型客车的数量最大值为4．【点睛】本题考查了一元一次不等式的应用，解题的关键是：先用含x的代数式表示出各数量，再根据各数量之间的关系，正确列出一元一次不等式．。
武汉实验外国语学校初中部七年级生物下册期中试卷测试卷及答案
武汉实验外国语学校初中部七年级生物下册期中试卷测试卷及答案一、选择题1．对人类的起源和进化，下列说法中正确的是（）①人猿分界的重要标准是直立行走②人类与黑猩猩有着共同的祖先③人类是由黑猩猩进化而立的④人类的进化与环境的改变没有关系A．①②B．①③C．①②③D．①④2．人的卵细胞在体内受精的场所以及胎儿发育的场所分别是（）A．卵巢和输卵管B．卵巢和子宫C．输卵管和子宫D．阴道和子宫3．人体生命活动所需要的能量，主要是由（）提供的A．糖类B．脂肪C．蛋白质D．维生素4．某同学通过燃烧花生种子和核桃仁探究不同食物贮存能量差异，它们作为食物时，也会在人体内“燃烧”。
体外燃烧时会：①消耗氧气；②产生二氧化碳；③产生能量。
那么在人体内“燃烧”也会表现的是（）A．①、②和③B．①和②C．①和③D．②和③5．图中的曲线分别表示淀粉、脂肪和蛋白质在消化道中各部位被消化的程度（A、B、C、D、E表示消化道部位，曲线 X、Y、Z表示营养物质）。
据图判断，以下说法错误的是（）A．曲线X表示淀粉，曲线Z表示脂肪B．器官A能初步消化淀粉C．曲线Y表示蛋白质，在C处被消化成氨基酸D．器官E能够吸收水、无机盐和维生素等6．如图为人体部分器官示意图，下列有关叙述正确的是（）A．①分泌的消化液中含消化脂肪的酶B．在②开始消化蛋白质C．③不分泌任何消化液D．④是吸收蛋白质等营养成分的主要场所7．在消化道内，下列各项能被人体直接吸收的营养成分是（）①脂肪②葡萄糖③淀粉④蛋白质⑤初步消化的蛋白质⑥维生素⑦无机盐⑧麦芽糖⑨氨基酸A．②⑤⑥⑦B．①③④⑤C．②⑥⑧⑨D．②⑥⑦⑨8．某人因胃痛需要到医院看病，首选的就诊科室是（）A．呼吸科B．消化内科C．泌尿科D．皮肤科9．下列结构中哪些是消化腺？（）①肝脏②肠腺③胃④小肠⑤胃腺⑥咽A．①②⑤B．①②③C．①④⑥D．②④⑤10．图是人体平静呼吸时，肺内气体容量变化示意图，cd段表示此人正在A．吸气B．呼气C．屏气D．吸气同时呼气11．如图是人体吸气示意图，下列描述正确的是：A．膈肌舒张，膈顶部上升，胸廓缩小B．膈肌舒张，膈顶部下降，胸廓扩大C．膈肌收缩，膈顶部上升，胸廓缩小D．膈肌收缩，膈顶部下降，胸廓扩大12．气体进入人体经过的呼吸道的排列顺序是（）①咽②喉③鼻腔④气管⑤支气管A．③一②一①一④一⑤B．③一①一②一④一⑤C．①一②一③一④一⑤D．③一①一④一②一⑤13．下列哪项不是呼吸道对吸入空气的作用（）A．杀死空气中全部的细菌B．湿润空气C．清洁空气D．温暖空气14．下列关于消化系统的说法，不正确的是（）A．消化系统是由消化道和消化腺组成的B．消化系统和呼吸系统共有的器官是咽C．消化道起始于口腔，终止于肛门D．胰腺分泌的消化液中不含消化酶15．气体和食物的共同通道是（）A．气管B．口腔C．咽D．喉16．如图为人体几种血管的示意图，表示动脉的是（）A．B．C．D．17．下列关于输血和献血的叙述，错误的是（）A．安全输血应以输同型血为原则B．对于贫血和大面积烧伤的患者应分别输入红细胞和血浆C．在没有同型血的紧急情况下，A 型血的人可以输入少量的 AB 型血D．健康成年人每次献血200～300毫升不会影响健康18．一位AB型血的人大量失血后，应给他输入（）A．A型血B．B型血C．AB型血D．O型血19．下图为心脏工作示意图,请据图分析,下列叙述中不正确的是( )A．该图表示心室收缩,血液泵至动脉B．该图表示动脉瓣关闭,房室瓣打开C．和①④相连的血管都是静脉D．从③流出的血液首先参与肺循环20．如图曲线表示人体血液中氧气和二氧化碳含量的变化，其中H为上肢动脉．下列能表示该图含义的正确组合是（）①A曲线代表氧气在血液中的变化②B曲线代表二氧化碳在血液中的变化③B曲线代表氧在血液中的变化④A曲线代表二氧化碳在血液中的变化⑤J表示上肢毛细血管⑥I表示上肢毛细血管．A．①②⑥B．①②⑤C．③④⑤D．③④⑥21．如图是显微镜下观察到的人血涂片物像，下列有关叙述不正确的是（）A．视野中，呈两面凹圆饼状的是③)，其中富含血红蛋白，具有运输氧气的功能B．血细胞中数目最多的是①，当有炎症时，其数目会显著增加C．血细胞中，具有止血和凝血作用的是④D．血液中运载血细胞、运输养料和废物的是②22．如图为某同学用显微镜观察到的人血永久涂片，有关叙述错误的一项是A．血液中含量最多的血细胞是①B．③所指的细胞具有防御保护功能C．当人体内出现急性炎症时，细胞②的数量会明显增加D．输血时主要考虑细胞①是否出现凝集现象23．如图是人体内的气体交换过程示意图，下列分析不正确的是（）A．人体内的气体交换包括（A）和（B）两个过程B．血红蛋白与氧结合发生在（B）过程C．人体内二氧化碳的最初来源是组织细胞D．图中①表示氧气，②表示二氧化碳24．如图为肺泡内的气体交换示意图（a、b代表过程，c、d代表物质），下列叙述错误的是（）A．外界气体通过b过程到达肺部依次经过鼻→咽→喉→气管→支气管B．进行过程a时，肋间肌和膈肌均处于舒张状态C．c代表的是二氧化碳，d代表氧气D．血管甲代表肺动脉，内流动脉血25．图是某同学在显微镜下观察的金鱼尾鳍内血液的流动图，请根据各血管中血液的流动方向判断甲、乙、丙三条血管各属于（）A．小动脉、小静脉、毛细血管B．小静脉、小动脉、毛细血管C．毛细血管、小动脉、小静脉D．小静脉、毛细血管、小动脉二、实验探究综合题26．内江的牛肉面色香味美、营养丰富，可谓闻名遐迩。
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武汉外国语学校七年级下期中考试试卷Revised as of 23 November 20202008----2009学年度下学期武汉外国语学校初中一年级期中考试数学试题（2009年4月）（命题人：廖艳梅卷面值：120分考试时间120分钟）亲爱的同学们：祝贺你完成了半年的学习，现在是展示你学习成果之时，希望你能尽情地发挥，祝你成功！一、看谁的命中率高（本题有12个小题，每小题3分，共36分）1．在下列图案中，不能用平移得到的图案是（ ）A ．B ．C ．D ．2．如图，下列判断错误．．的是（ ） A ．∵a ⊥c ，∴∠1= 90° B ．∵∠1= 90°，∴∠2 = 90° C ．∵a ⊥c ，b ⊥c ，∴a ∥bD ．∵∠3与∠4是同位角，∴∠3 =∠4dc ba 4321H GED CBA（第2题图） （第3题图）3．如图，D 、G 是△ABC 中AB 边上的任意两点，DE ∥BC ，GH ∥DC ，则图中相等的角共有（ ）A ．4对B ．5对C ．6对D ．7对4．如图，给出下面的推理，其中正确的是（ ）①∵∠B =∠BEF ，∴AB ∥EF ，②∵∠B =∠CDE ，∴AB ∥CD ， ③∵∠B +∠BEC =180°，∴AB ∥EF ，④∵AB ∥CD ，CD ∥EF ，∴AB ∥EF 。
A ．①②③ B ．①②④ C ．①③④ D ．②③④5．平面直角坐系中，点P （x ，y ）在第三象限，且P 到x 轴、y 轴的距离分别为3、7，则P 点坐标为（ ） A ．（-3，-7） B ．（-7，-3）C ．（3， 7）D ．（7， 3）FED CBA（第4题图）（第6题图）6．如图，方格纸上有B、A两点，若以点B 为原点，建立平面直角坐标系，则点A坐标为（3，4），若以点A为原点建立平面直角坐标系，则点B的坐标为（）A．（-3，-4） B．（-3，4）C．（3，-4） D．（3，4）7．下列命题正确的是（）A．如果两个角相等，那么这两个角是对顶角B．直线外一点和直线上的点连线中，垂线最短C．平面内，经过一点有且只有一条直线与已知直线平行D．平面内，经过一点有且只有一条直线与已知直线垂直。
8．如图，把一个长方形纸片沿EF折叠后，点D、C分别落在'D、'C的位置，若∠EFB = 65°，则∠AE'D等于（）A．50° B．55° C．60° D．65°CKIHGFEDCB A（第8题图）（第11题图）9．两根木棒分别为3cm和7cm，要选择第三根木棒，将它们钉成一个三角形，那么第三根木棒的长度可以是（）A．2cm B．4cm C．8cm D．10cm 10．在综合实践活动课上，小红准备用两种不同颜色的布料缝制一个正方形座垫，座垫的图案如右所示，应该选左图中的哪一块布料才能使其与右图拼接符合原来的图案模式（）A． B． C． D．11．如图，求∠A +∠B +∠C +∠D +∠E +∠F +∠G +∠H +∠I +∠K 的度数为（ ）A ． 720°B ．900°C ．1080°D ．1260°12．四个电子宠物排座位，一开始，小鼠、小猴、小兔、小猫分别坐在1、2、3、4号座位上（如图所示），以后它们不停地变换位置，第一次上下两排交换，第二次是在第一次换位后，再左右两列交换位置，第三次上下两排交换，第四次再左右两列交换……这样一直下去，则第2005次交换位置后，小兔子坐在（ ）号位上。
4321猫兔猴鼠猫兔猴鼠猫兔猴鼠→→…A ．1B ．2C ．3D ．4二、看谁填得又对又准（本题共8个小题，每小题3分，共24分）13．写出三个满足横纵坐标之积为 4的点的坐标：。
14．要把图中的三条线段组成三角形，可将线段MN 先向右平移 格，再向下平移 格。
MCBA（第14题图） （第15题图）15．如图，BM 是△ABC 中AC 边上的中线，AB = 5cm ，BC = 3cm ，那么△ABM 与△BCM 的周长之差为 。
16．如图，在△ABC 中，AD ⊥BC 于D ，BE ⊥AC 于E ，BC = 12，AC = 8，AD = 6，则BE 的长为 。
17．已知正多边形的内角和为1080°，那么这个正多边形的边数为 ；又若正多边形的每一个外角都是72°，那么这个正多边形的内角和等于 。
18．根据下面的镶嵌填空：①在图中，是用两种正多边形进行的镶嵌，在每一个顶点处，有 个正三角形， 个正方形。
②中山公园的地面要铺成这样的图案，要购买正三角形与正方形地板砖，在确定购买数量时，应使正三角形与正方形的块数之比为 时，才能既减少浪费，又能铺好地面。
ECBAD（第16题图） （第18题图） 19．周日，小华做作业时，把老师布置的一个正方形忘了画下来，打电话给小云，小云在电话中答复他：“你可以这样画，正方形ABCD 的顶点A 、B 、C 的坐标分别是（1，2）、（-2，2）、（-2，-1），顶点D 的坐标你自己想吧！”那么顶点D 的坐标是 。
20．多边形木架具有不稳定性，但加一些木条可以使其形状不变。
（1）多 边 形至少要加钉木条根数4567（2）根据上面的规律，要使一个n 边形（n≥4）的形状不变，至少要 根木条。
三、计算能手——看谁既快又准（本题有3小题，每小题6分，共18分） 21．已知DE ∥BC ，CD 平分∠ACB ，∠B =70°，∠ACB = 60°，求∠BDE 和∠BDC 的度数。
EDA22．如图，已知F 是⊿ABC 的边BC 的延长线上的一点，DF ⊥AB 于D ，且∠A = 56°，∠F = 31°，求∠ACB 的度数。
FEDCB A23．如图，在⊿ABC 中，D 是BC 上的一点，∠1 =∠2，∠3 =∠4，∠BAC = 63°，求∠DAC 的度数。
DCBA 4321四、在数学中玩，在玩中学数学（本题有4小题，每小题6分，共24分） 24．中国象棋棋盘中蕴含着平面直角坐标系，如下图是中国象棋棋盘的一半，棋子“马”走的规则是沿“日”形的对角线走。
例如：图①中“马”所在的位置可以直接走到点A 、B 处。
（1）如果“帅”位于点（0，0），“相”位于点（4，2），则“马”所在的点的坐标为 ，点C 的坐标为 ，点D 的坐标为 。
（2）若“马”的位置在C 点，为了到达D 点，请按“马”走的规则，在图中画出一种你认为合理的行走路线，并用坐标表示。
25．在图中的平面直角坐标系中描出下列各点，并将所有点用线段依次连接起来。
（1，1）、（2，1）、（3，1）、（4，1）、（4，2）、（3，2）、（3，3）、（4，3）、（4，4）、（3，4）、（3，5）、（2，5）、（2，4）、（2，3）、（2，2）、（1，2）、（1，1）。
观察所得的图形，你觉得它像什么如果将上面各点的横坐标都减去5，纵坐标都减去3，那么用同样的方法连接相应各点所得的图形发生了哪些变化26．已知⊿ABC的顶点坐标为：A（-1，3）、B（-4，-1）、C（3，-1）。
（1）图中画出AC边上的中线BM，并写出点M的坐标；（2）在图中画出BC边上的高AN，并写出N 点的坐标；（3）求⊿ABC的面积。
27．如图，三艘帆船A、B、C保持编队航行，分别写出它们的坐标。
一段时间以后，帆船A航行到'A位置，帆船B、C分别航行到什么位置呢在图中标出来并分别写出这三艘帆船所在新位置的坐标。
五、数学探究与思考（本题共2小题，每小题9分，共18分）28．如图①、②、③中，AB∥DE，请你探索∠A、∠C、∠D之间存在什么样的关系ED CBAEDCB A图① 图② 图③（1）请你阅读以下说明过程，并补全所空内容。
解：关系为：∠ACD =∠A +∠D ，理由如下：过C 作CF ∥AB 。
于是有∠ACF =∠A （ ） 因为AB ∥DE ，AB ∥CF所以DE ∥CF （ ） 即∠FCD =∠D （ ） 因此∠ACD =∠ACF +∠FCD =∠A +∠D 。
（2）探究：图②中∠A 、∠C 、∠D 的关系是 。
图③中∠A 、∠C 、∠D 的关系是。
（3）请你从所得的两个关系中任选取一个加以说明。
29．如图，△ABC 中，∠A = 96°，∠ABC 与∠ACB 的角平分线交于I ，△ABC 的外角∠DBC 与∠BCE 的角平分线交于P ，延长BI 、PC 交于R 。
（1）分别求出∠BIC 、∠P 、∠R 的度数； （2）当∠A 的度数度数增加4°时，∠BIC 、∠P 、∠R 的度数发生怎样的变化CBA IC B AIPEDCBA IPEDRF亲爱的同学，考试后进行反思是十分重要的，希望你能认真总结经验和不足，并将它写在笔记本上，这是你成长的记录，如果你对取得的成绩还感到不够满意，可以与老师联系，相信老师会根据你反思的情况，对你作出新的评价。
附: 考试说明及参考答案使用教材:人教版2004年版考试内容:第五章:相交线相交线、平行线、平线线的性质、平移。
第六章：平面直角坐标系平面直角坐标系、坐标方法的简单应用第七章：三角形与三角形有关的线段、与三角形有关的角、多边形及其内角和、课题学习（镶嵌）武汉外国语学校初中一年级期中考试参考答案一、选择题1．A 2．D 3．D 4．B5．B 6．A 7．D 8．A9．C 10．C 11．C 12．A二、填空题13．如（-2，2），（2，-2），（-4，1）等。
答案不惟一：14．5，115．2cm16．917．8，540°18．3，2；3∶119．（1，-1）20．（1）1，2，3，4；（2）n-3。
三、计算能手21．110°，80°。
22．65°23．设∠3 =∠4 =α，则∠1 =∠2 =12α，由△ABC内角和为180°，得α=78°，得∠DAC = 180°-2α= 24°。
24．（1）（-3，0），（1，3），（3，1）（2）略25．（1）像一个“上”字（2）形状、大小不变，位置发生了变化。
由原图形向左平移5个单位长度，再向下平移3个单位长度而成。
26．（1）M（1，1）（2）N（-1，-1）（3）⊿ABC的面积为14。
27．A（-2，3），B（-2，-2），C（-4，-2），'A（3，4），'B（3，-1），'C（1，-1）。
五、数学探究与思考28．（1）两直线平行，内错角相等；平行于同一条直线的两直线平行；两直线平行，内错角相等。