初二数学上册期末考试试题及答案.pdf

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1、1 / 10 D C A B 8 8 8 8 4 4 4 4 x x y y y y O O O O ABCD 数学部分 一、选择题 (每小题有且只有一个答案正确,每小题4分,共 40分 1、如图,两直线ab,与 1相等的角的个数为( c A、1个 B、2个 C、3个 D、4个 2、不等式组 x3 x A、33 D、无解 3、如果ab,那么下列各式中正确的是( D A、a3b D、2axbczLQPtbV A、AAS B 、ASA C 、SAS D 、SSS 5、已知一组数据1,7, 10,8, x,6,0,3,若x=5,则 x应等于 ( A、6 B、5 C、4 D、2 6、下列说法错误的是(

2、 A、长方体、正方体都是棱柱; B、三棱住的侧面是三角形; C、六棱住有六个侧面、侧面为长方形; D、球体的三种视图均为同样大小的图形; 7、 ABC 的三边为 a、b、c,且 2 (a+b)(a-b)=c,则 ( A、 ABC 是锐角三角形; B、c边的对角是直角; C、 ABC 是钝角三角形; D、a边的对角是直角; 8、为筹备班级的初中毕业联欢会,班长对全班学生爱吃哪几种水果作了民意调查,那么最终买什么水果,下面的调 查数据中最值得关注的是( xbczLQPtbV A、中位数; B、平均数; C、众数; D、加权平均数; 9、如右图,有三个大小一样的正方体,每个正方体的六个面上都按照相同

3、的顺序,依次标有 1,2,3,4, 5,6这六个数字,并且把标有“ 6” 的面都放在左边,那么它们底面所标的3个数 字之和等于 ( xbczLQPtbV A、8 B、9 C、10 D、11 10、为鼓励居民节约用水,北京市出台了新的居民用水收费标准:(1若每月每户居民用水不超过4立方 M ,则按每立 方M 2M计算; (2若每月每户居民用水超过4立方 M,则超过部分按每立方M 4.5M 计算 (不超过部分仍按每立方M 2元计 算。现假设该市某户居民某月用水x立方 M ,水费为 y元,则 y与x的函数关系用图象表示正确的是( xbczLQPtbV 二、填空题 (每小题 4分,共 32分 11、不

4、等式2x-13的解集是 _x2_ ; 12、已知点 A在第四象限,且到x轴, y轴的距离分别为3,5,则 A点的坐标为 _; 13、为了了解某校初三年级400名学生的体重情况,从中抽查了50名学生的体重进行统计分析,在这个问题中,总体 1 a b 4 1 3 2 1 2 6 2 / 10 A B C D E F A B O C D y x 5 20 21 12 S(千 M 22 是指 _;xbczLQPtbV 14、某班一次体育测试中得100分的有 4人, 90分的有 11人, 80分的有 11人, 70分的有 8人, 60分的有 5人,剩下的 8人 一共得了 300分,则中位数是_。xbcz

5、LQPtbV 15、如图,已知B=DEF,AB=DE ,请添加一个条件使ABC DEF,则需添加的条件是_; xbczLQPtbV 16、如图, AD 和BC相交于点 O,OA=OD ,OB=OC ,若 B=40, AOB=110 ,则 D=_ 度; xbczLQPtbV 17、弹簧的长度y(cm与所挂物体的质量x (kg的关系是一次函数, 图象如右图所示,则弹簧不挂物体时的长度是_cm; 第15题图第16题图第 17题图xbczLQPtbV 18、如下图所示,图中是一个立体图形的三视图,请你根据视图,说出立体图形的名称: 对应的立体图形是_的三视图。 三、解答题 (共78分 19、(8分解不

6、等式 x+1 (x1)1 2 ,并把解集在数轴上表示出来。 20、(8分填空 (补全下列证明及括号内的推理依据: 如图:已知: AD BC于D,EFBC于F, 1=3, 求证: AD 平分 BAC 。 证明: AD BC,EFBC 于F(已知 AD EF( 1=E( 2=3( 又 3=1(已知 1=2(等量代换 AD 平分 BAC( 21、画出下图的三视图(9分 22、(9分已知点 A(10 , 0,B(10,8,C(5,0,D(0,8,E(0,0,请在下面的平面直角坐标系中, xbczLQPtbV (1分别描出 A、B、C、 D、 E五个点,并顺次连接这五个点,观察图形像什么字母; (2要图

7、象 “ 高矮 ” 不变, “ 胖瘦 ” 变为原来图形的一半,坐标值应发生怎样的变化? 23、(10分如图, lA, lB分别表示 A步行与 B骑车在同一路上行驶的路程 S与时间 t的关系。 主视图 左视图 俯视图 1 2 3 A B C D E F 3 / 10 A B C D E F (1B出发时与 A相距 _千M 。 (2走了一段路后,自行车发生故障,进行修理,所用的时间是_小时。 (3B出发后 _小时与 A相遇。 (4若B的自行车不发生故障,保持出发时的速度前进,几小时与A相遇,相遇点离B的出发点多少千M 。在图中表 示出这个相遇点C,并写出过程。xbczLQPtbV 24、(10分 已

8、知:如图, RtABC RtADE , ABC= ADE=90 ,试以图中标有字母的点为端点,连结两条线段, 如果你所连结的两条线段满足相等、垂直或平行关系中的一种,那么请你把它写出来并说明理由。xbczLQPtbV 25、(10分 某工厂有甲、乙两条生产线,在乙生产线投产前,甲生产线已生产了200吨成品,从乙生产线投产开始, 甲、乙两条生产线每天生产20吨和 30吨成品。xbczLQPtbV (1分别求出甲、乙两条生产线投产后,各自的总产量y(吨与从乙开始投产以后所用时间x(天 之间的函数关系 式,并求出第几天结束时,甲、乙两条生产线的总产量相同;xbczLQPtbV (2在如图所示的直角坐

9、标系中,作出上述两个函数和第一象限内的图象,并观察图象,分别指出第15天和第 25天 结束时,哪条生产线的总产量高?xbczLQPtbV 26、(14分 (1为保护环境,某校环保小组成员小敏收集废电池,第一天收集1号电池 4节、 5号电池 5节,总重量460 克;第二天收集1号电池 2节、 5号电池 3节,总重量 240克。xbczLQPtbV 求1号和 5号电池每节分别重多少克? 学校环保小组为估算四月份收集废电池的总重量,他们随意抽取了该月腜5天每天收集废电池的数量,如下 表:xbczLQPtbV 1号废电池 (单位:节 29 30 32 28 31 5号废电池 (单位:节 51 53 4

10、7 49 50 分别计算两种电池的样本平均数,并由此估算该月(30天环保小组收集废电池的总重量是多少千克? (2如图,用正方体石墩垒石梯,下图分别表示垒到一、二、三阶梯时的情况,那么照这样垒下去, 填出下表中未填的两空,观察规律。 阶梯级数一级二级三级四级 石墩块数3 9 垒到第 n级阶梯时,共用正方体石墩_块(用含 n的代数式表示 。 英语部分 .单项选择 21.He _ when the UFO arrived. 4 / 10 A. was sleeping B. were sleeping C. has slept D. is asleep xbczLQPtbV ( 22.I have

11、been skating _ nine oclock. A. for B. since C. at D. fromxbczLQPtbV ( 23.Would you mind _ those old jeans? A. don t wear B. not to wear C. arent wearing D. not wearingxbczLQPtbV ( 24.- Hes never been to an aquarium. -_. A. Neither have I B. Neither do I C. I never too D. I dont tooxbczLQPtbV ( 25.It

12、s really cold today, _ ? A. does it B. doesnt it C. isnt it D. is itxbczLQPtbV ( 26._ have you been swimming? For five years. xbczLQPtbV A. How many times B. How long C. How often D. How much xbczLQPtbV ( 27.-Could you please _ in the room? - Oh, I m sorry. A. not smoking B. not smoke C. not to smok

13、e D. dont smokexbczLQPtbV ( 28.-Could we buy a piano, Jack? - I m afraid there _ enough room for one in the house. xbczLQPtbV A. aren t B. are C. isnt D. is xbczLQPtbV ( 29.I got home _ they were having dinner. A. as soon as B. while C. because D. afterxbczLQPtbV ( 30. We got mad _ the team for losi

14、ng the match. xbczLQPtbV A. at B. in C. on D. about xbczLQPtbV ( 31.She _ a lot of money on clothes. A. takes B. costs C. spends D. buys xbczLQPtbV ( 32.I will stay at home and read books if it _ tomorrow.xbczLQPtbV A. is raining B. rains C. rain D. will rainxbczLQPtbV ( 33.The teacher encourages he

15、r students _ English as much as possible. xbczLQPtbV A. to speak B. speaking C. speak D. spoke xbczLQPtbV ( 34.His father _ to Nanjing. He _ back next week. xbczLQPtbV has been, is B has been, will beC. has gone, is D. has gone, will bexbczLQPtbV ( 35.The teacher said that they _ hard-working studen

16、ts. xbczLQPtbV A. is B. are C. were D. was xbczLQPtbV .用所给词语的适当形式完成下列句子。 A: What are you doing, Jenny? B: 41._ Im cleaning the house. A: Do you often do it? B: Sometimes when Im free. 42._ A: Here it is. What will you do after you finishing the cleaning? xbczLQPtbV B: 43._ A: 44._ Let s go swimming,

17、 shall we? B: Sounds great. A: Let me help you then. 45._ 5 / 10 B: Thank you. A. Nothing much. B. In this way you can finish the work sooner. C. What bad weather! D. Cant you see? E. Can you see the book? F. It will be a pity to stay at home in such fine weather. G. Could you please pass me the tow

18、el? 41._ 42._ 43._ 44._ 45._ (B用适当的词语补全下面对话。 A: Hello. May I 46._ Mr Brown. B: Sorry, he isnt in. He 47._ to France.xbczLQPtbV A: Well, then do you know 48._? B: He said he would return in a month. A: Oh, such a long time. 49._ can I get in touch with him?xbczLQPtbV B: You may 50._. A: What s his te

19、lephone number? B: It s 00334760488532. .句子翻译。 is one of 61 drinks in the world. A lot of people enjoy 62_ it. But now people begin to believe that its not a good drink for health. There is lots of 63 in the coke. Having much sugar is 64 for people. And it also has some caffeine(咖啡因 in it. The caffe

20、ine can get people into the habit(习惯 of drinking more coke when they feel 65 . If they dont drink coke they 66 bad. And 67 thing is some people cant work or study 68 drinking several cups of coke every day. More and more people want to cut down the coke they drink and ask 69 help from the doctors. I

21、f you like drinking coke very much, I think you must have the Coke Habit. In fact drinking more fruit and vegetable juice is 70_ for you.xbczLQPtbV ( 61.A. more popular B. most popular C. popular D. the most popularxbczLQPtbV ( 62.A. drink B. drinking C. to drink D. drinks xbczLQPtbV ( 63.A. salt B.

22、 pepper C. sugar D. juice xbczLQPtbV ( 64.A. good B. well C. tired D. badxbczLQPtbV ( 65.A. hungry B. fine C. thirsty D. excitedxbczLQPtbV ( 66.A. will feel B. are feeling C. felt D. feel xbczLQPtbV 6 / 10 ( 67.A. bad B. worse C. the worst D. the worse xbczLQPtbV ( 68.A. not B. without C. with D. af

23、ter xbczLQPtbV ( 69.A. to B. for C. on D. atxbczLQPtbV ( 70.A. good B. well C. best D. better xbczLQPtbV .阅读理解 阅读短文 , 然后根据短文内容选择正确答案。 Passage 1 Birds live in trees. Squirrels71.These frogs are hard to find because _. xbczLQPtbV A. they stay in trees B. they can change their colors xbczLQPtbV C. they

24、 have sticky pads D. they make surprising sounds xbczLQPtbV ( 72.If the season is spring, the colors of tree frogs is _.xbczLQPtbV A. gold B. brown C. green D. bluexbczLQPtbV ( 73.The tree frogs can stay on trees because _. xbczLQPtbV A. they have sticky pads B. they can change their colors xbczLQPt

25、bV C. they are strong D. they are smallxbczLQPtbV ( 74.Which of the following sentences is right? A. The tree frogs have different colors and feathers75.The passage is mainly about _. A. the colors of a special frog B. the sound of a special frogxbczLQPtbV C. the eyes of a special frog D. a frog tha

26、t is special xbczLQPtbV Passage 2 Most of the flowers in nature are red, orange and yellow. If we have seen a black flower, it s chance in million.xbczLQPtbV People have made a survey of colors of more than four thousand kinds of flowers and found that only eight of them are black. xbczLQPtbV As we

27、know, sunlight is formed (形成 by seven different colored lights. The wave length ( 波长 of each light is different, so the quantity (量 of heat in each light is also different. Flowers especially their petal (花瓣 , are easy to be harmed ( 伤害 by high temperature. xbczLQPtbV Black flowers can take in all t

28、he light waves which cause the flowers to dry up in a high temperature. So black flowers can rarely (很少 survive ( 挺过 sunlight. But red flowers, orange flowers and yellow flowers can protect (保 护 themselves from sunlight by reflecting (反射 the red light, orange light and yellow light, each of which ha

29、s a large quantity of heat.xbczLQPtbV ( 76.People can_ see black flowers. A. often B. never C. hardly ever D. always ( 77.The underlined word “ them ” in the second paragraph refers to ( 指 _. xbczLQPtbV A. a thousand B. colors C. flowers D. kinds ( 78.The passage mainly tells us that _. A. black flo

30、wers are too weak and it is difficult for them to grow up xbczLQPtbV B. there are only eight black flowers in nature 7 / 10 C. sunlight has seven different colored lights and the wave length of each is different xbczLQPtbV D. why its difficult for black flowers to grow ( 79.How do red flowers, orang

31、e flowers or yellow flowers protect themselves from sunlight?xbczLQPtbV A. By taking in the light. B. By reflecting the light. xbczLQPtbV C. By hiding themselves. D. By sleeping. ( 80.Which of the following ideas is NOT right? A. The black flowers cannot protect themselves from the sunlight. xbczLQP

32、tbV B. Red, orange and yellow flowers can also take in the light of all wave lengths.xbczLQPtbV C. People have found that only a few kinds of flowers are black. xbczLQPtbV D. Flowers are easy to be harmed by very high temperature.xbczLQPtbV (B 阅读短文,然后根据短文内容填写表格或回答问题。 Passage 3 People live around the

33、 world. They like to have celebrations (庆祝活动 . In China, people celebrate New Year. New Year is in January or February. They wear red clothes because red is the color that will bring joy. Chinese children get money in red envelopes for the new year. In Gambia (冈比亚 , people celebrate Independence Day

34、 (独立日 . It is in February. They wear bright clothes and play music at the celebration. In England, people celebrate May Day. May Day is in May. They wear pretty clothes to celebrate the coming spring. The children like to dance on this day. In America, people celebrate Thanksgiving Day (感恩节 . Its in

35、 November. They have a very big dinner with their families or friends. They eat turkeys and a lot of other delicious food. They have a long talk after dinner.xbczLQPtbV Celebrations Around the World 61._ Celebrations Months Clothes China New Year January or February 62._ Gambia 63._ February bright

36、clothes 64._ May Day May pretty clothes America Thanksgiving Day 65._ Passage 4 Are you interested in Helmut Newton and John Pilger? Do you want to learn more about their painting? Come to Barbican Gallery (画廊 !xbczLQPtbV Barbican Gallery Open Mon, Thu- Sat 10am- 6 pm (Helmut Newton ; Tue, Wed, Sun

37、10am- 9pm ( John Pilger Tickets Adults ( 成人 ¥ 7 Students, young people 12-17, over 60s ¥5 Disabled people with companion ¥ 3.5 Under 12 free Barbican Card discount (折扣 20% off full price tickets Group Bookings Can be made through the Groups line 7382 7211 Adult groups of 10 or more ¥6 each School an

38、d full time student groups of 10 or more ¥2 each. 86.When may you go to Barbican Gallery to see the paintings on Tuesday? xbczLQPtbV _. 87.Does a child under twelve need to pay any money to see the paintings? xbczLQPtbV _. 88.Whose paintings can you see if you go to the gallery on Saturday? xbczLQPt

39、bV _. 89.What telephone number can you call if you want to book tickets? xbczLQPtbV _. 90.How much should you pay if you want to buy tickets for group of ten students? xbczLQPtbV _. .书面表达 比四分之三还多 的是用英语。并谈一谈你是怎样学习英语的。xbczLQPtbV 数学部分 8 / 10 A B C D F E 一、选择题 (每小题有且只有一个答案正确,每小题4分,共 40分 1、C;2、A;3、D; 4、A

40、;5、B;6、 B; 7、D;8、C;9、 A; 10、C; 二、填空题 (每小题 4分,共 32分 11、 2x ;12、 (5, 3) ;13、某校初三年级400名学生体重情况的全体;14、80分 15、BC=EF( 答案不唯一 ;16、 30;17、9;18、四棱锥或五面体; 三、解答题 (共78分 19、解: x+1 (x1)1 2 x+12(x1)2(2分 x12x22(1分 x1(1分 x1(2分 数轴表示正确2分; 20、证明: AD BC,EFBC于F(已知 AD EF(同位角相等,两直线平等或在同一平面内,垂直于同一条干线的两条直线平行 1=E(两条直线平行,同位角相等 2=

41、3(两条直线平行,内错角相等 又 3=1(已知 1=2(等量代换 AD 平分 BAC( 角平分线的定义 每空 2分,共 8分; 21、图形如下,每个3分,共 9分; 主视图左视图俯视图 22、图形略, (3分 (1像字母 M;(2分 (2 横坐标变为原来 的一半,纵坐标不变;(4分 23、(110;(21;(33;(每题 1分 (4解:表示出相遇点C得 1分; 求出 lA的函数关系式:S=4t+10分 求出 B l 的函数关系:S=15t分 解得 10 t= 11 分 150 S= 11 1分 24、解:有不同的情况,图形画正确,并且结论也正确的即可给2分; (1连结 CD、 EB,则有 CD

42、EB; (2连结 AF、BD ,则有 AFBD ; (3连结 BD、 EC,则有 BD EC; 选(1; 证明: Rt ABC RtADE( 已知 ACAE,AD AB( 全等三角形对应边相等 CAB EAB( 全等三角形对应角相等分 CABBAD=EADBAD 即: CAD=EAB 2分 1 2 0 9 / 10 在 ADC 和 ABE 中: AC=AE DCAD=? EAB AD=AB ADC ABE(SAS 分 CDEB分 25、(1解得:y =200+20x 甲 分 y =30x 乙 分 两者总生产量相等,即:y =y乙 甲 200+20x=30x 解得:x=20分 (2图形略,分 第

43、15天结束,甲的总生产量大于乙的总生产量;分 第25天结束时,乙的总生产量大于甲的总生产量;分 26、解: (1设 1号电池每节重量为x克, 5号电池每节重量为y克; 由题意可得: 4x+5y=460 2x+3y=240 分 解得:x=90,y=201分 答: 1号电池每节重量为90克, 5号电池每节重量为20克;1分 求得 1号电池平均每天30节, 5号电池平均每天50节,2分 所以总重量 (30 905020) 30111000(克) 111(千克 2分 (218,30, 3n(n+1) 2 第一个空1分,第二个空2分,第三空 3分; 英语部分 . ABDAC BBCBA CBADC .

44、discovered, looking through, get over, has collected, keep downxbczLQPtbV . A DGAFB B 46.speak to 47.has gone 48.when he will return/be back 49. How xbczLQPtbV 50. call him/call him up/ring him up/ telephone him xbczLQPtbV . 51 raise money for 52.has made great/much progress 53.put out xbczLQPtbV 54.take interest/become interested in 55.if you cut in line xbczLQPtbV 56.Two thirds of the students in our class are/come from the south. xbczLQPtbV 57. You shouldnt break the school rule(s 58.Neith er

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