九年级下测试(1—3章)

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九年级英语全册Units1_3综合水平测试新版人教新目标版(含答案)

九年级英语全册新版人教新目标版：Units 1～3 综合水平测试得分________卷后分________评价________听力部分(20分)一、听句子，选择相符的图片，有一项多余。

(5×1分＝5分)A B CD E F1．__F__ 2.__E__ 3.__D__ 4.__A__ 5.__C__二、听短对话，选择正确的答案。

(5×1分＝5分)(C)6.What does the boy want to buy?A．Some books. B．Some flowers.C．Some stamps.(A)7.Where does the man want to go?A．To a bank. B．To a restaurant.C．To a shopping center.(B)8.What festival might the speakers celebrate that day?A．The Spring Festival.B．The Dragon Boat Festival.C．The MidAutumn Festival.(B)9.Why does Tina not make up conversations?A．Because she wants to stay alone.B．Because she doesn't have a partner.C．Because she has to finish writing first.(A)10.What's the matter with the boy?A．He can't read quickly.B.He can't pronounce the words.C．He can't remember the words.三、听长对话，选择正确的答案。

(5×1分＝5分)听下面一段对话，回答第11、12小题。

新目标英语九年级第1---3单元同步测试题

新目标英语九年级第1-——3单元同步测试题听力测试(满分30分）一、听短对话回答问题（共5小题，计5分）（）1。

What is the man going to do?A。

Run to the airport. B. Wait for another bus. C .Run to catch the bus. ( ）2. When did the plane leave？A。

12:05。

B。

11:50. C。

11：35。

（)3. Where is Amy’s father？A。

In the hospital. B. At home。

C. At work.（）4。

How long did Jane stay in Canada?A。

2 days。

B. 3 days. C。

5 days。

( )5. What is the woman？A. A student.B. A teacher. C。

A Chinese engineer.二、听长对话回答问题（共6小题，计12分）( ）6。

What does Peter want to do？A。

He wants to go to Europe for studies。

B。

He wants to take a vacation。

C。

He wants to travel around Europe during this vacation.（）7. Why will he stay in Youth Hostels （旅店，招待所）？A. Because they are cheap and comfortable to live in.B. Because they are cheap and it is also possible to meet lots of young people there。

C。

Because they are possible to meet lots of old friends there.( ）8。

新目标九年级英语1-3单元测试题

初三英语月考试题一、单项选择（20分）1.You look smarter on your school uniforms.————A.No, I don’t.B.Yes, thanks.C.Thank you.2.Don’t make so much ____.The boy is sleeping.A.mistakesB.noiseC.voice3. Do you learn English by ____English--language videos?A.seeingB.readingC.watching4.I’m terrified ____the dark.I’ll go to sleep ____my bedroom light ____.A.of, on, onB. of,with, onC.in, on, with5.The boys listened to the music ____ making flashcards.A.insteadB.instead ofC.not6. Many teachers think most of students spend much time ____computers.A.to playB.playedC.playing7 The students in Grade Three have so much homework to do every day. So they have to ____every night.A.give upB.end upC.stay up8. Linfen _____a lot in the last few years.A.is changingB.changesC.has changed9. ---Is Mr Green really ill?---_____.He’s in hospital.A.I don’t think so.B.I hope so.C.I’m afraid so.10.The students in our class was _____at the _____news.A.frustrating, frustratedB.frustrate, . frustratingC.frustrated, frustrating11. Uncle Wang has moved to the countryside. He doesn’t live here _____A.anymoreB.no moreC.no longer12 .---Can you catch what I said ?---Sorry, I can ____understand it.A.almostB.hardlyC.nearly13.Why don’t you join an English language club to practice ____English?A.to speakB.speakingC.speaks14. ---They have a lot of strict rules at home.---_____.A.So we have.B.so do we.C.So I have.15. Teenagers should ___to choose their own clothes.A.be allowedB.allowC.allowed16.He used to be afraid of the dark,_______?A.didn’t heB.don’t heC.doesn’t he17.I don’t know ____to use commas.A.whatB.why c.how18.I heard that a ______boy could swim across the river.A.twelve—years—oldB.twelve—year—oldC.twelve—year—olds19. Mr Wang is strict ___his work, he’s also strict ___his son.A.in, withB.with, inC.in , on20.I think Larry should stop ___that silly earrings.A.to wearB.to put onC.wearing二、完形填空〈20分〉(A)Dictionaries are 21 useful books. People use dictionariesto 22 out the meanings of words. 23 you are learning English, you would use 24English dictionary. Some students have 25 . Their dictionaries contain （包含）Chinese and English words. They are useful, but it is usually 26to use a dictionary written completely 27 English. This will 28 you to begin to think in English. A good English dictionary will show you the correct 29 of a word and its pronunciation. Many dictionaries also show 30 a word is used in sentences.21A. much B. too C. very D. such22.A. take B. find C. hand D. send23.A. After B. If C. Before D. Because of24. A. the B. a C. an D. /25. A. book B. newspaper C. dictionaries D. magazine26. A. good B. well C. nice D. better27. A. with B. about C. in D. for28. A. make B. let C. help D. show29. A. spelt B. spell C. be spelt D. spelling30. A. what B. why C. how D. when（B）several 40 before it is printed(印刷). In the factory, many people are busy working on it. They print it on good paper, get the pieces together and so on.We all like reading. Let’s take good care of books.( )31. A. some times B. some time C. sometimes D. sometime ( )32. A. the others B. another C. the other D. other( )33. A. for B. to C. as D. like( )34. A. much B. many C. many more D. much more( )35. A. oneself B. himself C. yourself D. themselves( )36. A. how B. what C. when D. where( )37. A. reads B. writes C. reading D. writing( )38. A. careful B. carefully C. quick D. quickly( )39. A. must be B. must have C. must not be D. must not have( )40. A. time B. times C. mistakes D. books三、阅读理解（30分）AThe students were having their chemistry class. Miss Li was telling the children what water was like. After that, she asked her students, “What’s water?”No one spoke for a few minutes．Miss Li asked again，“Why don’t you answer my question？Didn’t I tell you what water is like？”Just then a boy put up his hand and said，“Miss Li，you told us that water has no colour and no smell．But where to find such kind of water？The water in the river behind my house is always black and it has a bad smell．”Most of the children agreed With him．“I’m sorry，children．”said the teacher，“Our water is getting dirtier and dirtier．That’s a problem．”41．The students were having their _______ class．A．English B．Chinese C．chemistry D．maths42.Miss Li was telling the children what ______ was like．A．water B．air C．earth D．weather43．A boy said，“The water in the river behind m y house is always_______．”A．white B．black C．clean D．clear44．Most of the children _______ the boy．A．agreed with B．wrote toC．heard from D．sent for45．The water in the river has colour and smell because it is getting_______．A．more and more B．less and lessC．cleaner and cleaner D．dirtier and dirtierBIn England , people don’t usually talk much. You can go on a bus, or in a train, and everyone sits looking out of the window. Often they read. They read books and papers, but they don’t talk much .When you meet English people, they often talk about one thing, the weather. So When you meet somebody in England , you can say, “Nice weather for the time of year ! ”“But it was a little cold yesterday,” somebody may answer.“But it got a bit warmer later, ” you can say.Talk like this, and the English will think, “How friendly you are ! ”46.English people often _____ on a bus .A. talk much B .talk about C. eat something D .read papers47 . When you meet English people, talk like this:A. How do you do ! B .How are you !C. Nice weather !D. Nice to meet you !48. If you talk with the English people about the weather, they will think_____ .A. you are friendlyB. you are rightC. you are EnglishD. you talk too much49 English people always hope the weather will get ______ .A. betterB. warmerC. colder D .hotter50. Which is right ?A. English people like to talk on a bus .B. English people didn’t enjoy the best weather .C. English people are the most friendly.D. English people don’t talk muchCVI.根据短文判断正误（正T ,误F）One day Mozart saw an old man playing the violin at the street corner.He found that the old man was playing one of his compositions(乐曲) .The old man played for some time, but the cap in front of him was still empty—nobody put any money into the cap.Mozart asked the old man ,”Do you often play compositions by Mozart?”The old man answered ,”Now everybody knows Mozart and likes his compositions.””Do you make a living by playing the violion?”The old man said he did.Mozart took over the violin from the old man and began to play. He played so well that all the passers-by stopped to listen to the wonderful music and soon the old man felt surprised that the man could play so wel l,He asked Mozart,”Who are you ,Sir?””A poor musician like you.”then Mozart gave the violin to the old man and went away.( )51.Mozart was a famous musician.( )52.the old man played the violin at the street corner to give a concert.( )53.Nobody gave any money to the old man because he played the composition by Mozart.( )54.All of the passers-by stopped to listen to the music because Mozart played so well.( )55.When the old man heard the wonderful music he was disappointed.四、补全对话,选择正确的句子补全下列对话。

九年级物理1-3章试题

九年级物理水平测试卷2014、10一、单项选择（每题2分，共26分）1、以下自然现象形成过程中需要吸热的是（）A 、春天到了，冰雪消融B 、初夏，林中白雾弥漫C 、清晨，草叶上露珠晶莹D 、深秋，果树上挂满了白霜 2、下列现象不可能出现的是（）A 、寒冷的冬天，冰冻的衣服也会变干B 、潮湿的夏天，从冰箱里取出的啤酒瓶上会出现小水珠C 、有风的天气，游泳后从水中出来会感觉冷D 、冬天，戴眼镜的人从室内走到室外，眼睛上会出现小水珠 3、下列事例中，做功改变物体内能的是（）A 、用酒精灯加热烧杯中的水B 、冬天使用暖气取暖C 、用锯子锯木板，锯条发热D 、盆中的热水温度逐渐降低 4、在如图所示的电路中，闭合开关后两盏灯都能发光的是（）5、四位同学分别用温度计测量烧杯中热水袋温度，他们把温度计玻璃泡完全浸入到热水中去，每个人测量读数的方法不同，正确的事（）A 、温度计刚放进去就马上读数B 、读数时，把温度计取出来仔细读数C 、待温度计内液面稳定后平视读数D 、测量时，把温度计的玻璃泡触到杯底，然后读数6、两个相同的容器分别装满了质量相同的甲、乙两种液体．用同一热源分别加热，液体温度与加热时间关系如图所示．则（）A ．甲液体的比热容大于乙液体的比热容B ．如果升高相同的温度，两液体吸收的热量相同C ．加热相同的时间，甲液体吸收的热量大于乙液体吸收的热量D ．加热相同的时间，甲液体温度升高的比乙液体温度升高的多7、7、2008年9月25日晚上9：10我国神舟七号载人航天飞船成功飞上天空，右图是火箭发射的情景，从图上可以看出能的转化和物态变化现象，下列说法中，正确的是（）A 变成气态的水，再凝结成小冰晶和小水珠B 腾变成气态的水，再遇冷液化成小水珠C 腾变成气态的水，再遇冷液化成小水珠D 化而形成的白气8A 、 A 图是内能转化为机械能B 、B 图是内能转化为机械能C 、 C 图是排气冲程D 、D 图是压缩冲程9、9、在23℃的教室里将温度计从装有酒精的瓶中取出，它的示数将（）A 、立即上升B 、先上升后下降C 、先下降后上升D 、一直保持不变 10、关于热量、功、内能的概念下列说法正确的是（）A 、热量、功、内能的国际单位都是焦耳，所以三者的物理意义是相同的B 、热传递和做功是改变物体内能的两种方式C 、内能越大的物体所含的热量就越多D 、物体对外做了功，又吸收了热量，物体内能一定增加11、教室里投影仪的光源是强光灯泡，发光时必须用风扇给予降温.为了保证灯泡不被烧坏，要求：带动风C B A D扇的电动机启动后，灯泡才能发光；风扇不转，灯泡不能发光.则在如图所示的四个电路图中符合要求的是（）12、完全燃烧42g 焦炭放出的热量，若有50%被2kg ，30℃的水吸收，则水温可升高（）（c 水=4.2*103J/Kg ℃，焦炭=3.0*103J/Kg ，此时外界为一个标准大气压） A .70 ℃ B . 75℃ C. 100 ℃ D . 105℃13、如图所示的电路中，电流表的接法错误的是（）A.只有（1）B.只有（2）C.只有（3）D.都错误二、多项选择题（选不全扣一分，错选不得分，每题3分，共12分）14、水是一种重要资源，人类的生存及工业生产与水息息相关，以下与水有关的说法中正确的是（）A.水在任何温度下都能汽化B.水结冰时要吸收热量C.水的比热容比沙石、干泥的比热容大得多，这是沿海地区昼夜温差小的主要原因D.随着社会的发展和人口的增长水资源已出现严重危机，我们一定要节约用水15.小红在做电学实验时，连完电路没有进行检查，用“试触法”选取电流表量程时发现指针迅速摆动到最大刻度，发生这种情况的原因可能是（） A.电流表正负接线柱接反B.选用了小量程试触C.线路接错，某处发生了短路，电路中电流过大D.以上原因都不对16、.如图所示的电路中，以下说法正确的是（）A.当S 1断开、S 2闭合时，L 1、L 2都能发光B.当S 1、S 2都闭合时，L 1、L 2都不能发光C.当S 1、S 2都断开时，L 1能发光，L 2不能发光 D 当S 1、S 2都闭合时,.L 1不能发光，L 2能发光17、小明在使用手电筒时发现小灯泡不亮，进行检修前，他对造成该现象的直接原因进行了以下几种判断，其中可能的原因是（）A 、开关处出现短路B 、小灯泡灯丝断了C 、小灯泡接触不良D 、电池两端电压过三、填空（每空1分共24分）18、某同学参加兴趣小组活动时，连成了如图所示的电路.当S 1、S 2都闭合时，发光的灯泡是_____；当S 1断开、S 2闭合时，发光的灯泡是______.19、固体可分为__________和___________两类；如：食盐、明矾等属于_________，松香、玻璃等属属于_________。

九年级数学第1-3章试卷

九年级数学第1-3章试卷参考答案与试题解析一．选择题〔共10小题〕1．C．2．〔2021•湘潭〕如图，A、B两点在双曲线y=上，分别经过A、B两点向轴作垂线段，S阴影=1，那么S1+S2=〔〕A．3B．4C．5D．6那么根据反比例函数的图象的性质得两个矩形的面积都等于|k|=4，∴S1+S2=4+4﹣1×2=6．应选：D．3．〔2021•贵港〕如图，在平面直角坐标系中，反比例函数y1=的图象与一次函数y2=kx+b 的图象交于A、B两点．假设y1＜y2，那么x的取值范围是〔〕A．1＜x＜3B．x＜0或1＜x＜3C．0＜x＜1D．x＞3或0＜x＜1解：由图象可知，当x＜0或1＜x＜3时，y1＜y2，应选：B．4．〔2021•陕西〕假设x=﹣2是关于x的一元二次方程x2﹣ax+a2=0的一个根，那么a 的值为〔〕A．1或4B．﹣1或﹣4C．﹣1或4D．1或﹣4∴4+5a+a2=0，∴〔a+1〕〔a+4〕=0，解得a1=﹣1，a2=﹣4，应选：B．5．〔2021•内江〕假设关于x的一元二次方程〔k﹣1〕x2+2x﹣2=0有不相等实数根，那么k的取值范围是〔〕A．k ＞B．k≥C．k ＞且k≠1D．k≥且k≠1∴△=22﹣4〔k﹣1〕×〔﹣2〕＞0，解得k ＞；且k﹣1≠0，即k≠1．应选：C．6．〔2021•天津〕要组织一次排球邀请赛，参赛的每个队之间都要比赛一场，根据场地和时间等条件，赛程方案安排7天，每天安排4场比赛．设比赛组织者应邀请x个队参赛，那么x满足的关系式为〔〕A．x〔x+1〕=28B．x〔x﹣1〕=28C．x〔x+1〕=28D．x〔x﹣1〕=28：B．7．〔2021•包头〕如图，在△ABC中，点D，E，F分别在边AB，AC，BC上，且DE∥BC，EF∥AB．假设AD=2BD ，那么的值为〔〕A．B．C．D．AD=2BD，∴==2，==2，应选：A．8．〔2021•泸州〕如图，在直角梯形ABCD中，DC∥AB，∠DAB=90°，AC⊥BC，AC=BC，∠ABC的平分线分别交AD、AC于点E，F ，那么的值是〔〕A．B．C．D．解：作FG⊥AB于点G，∵∠DAB=90°，∴AE∥FG，∵AC⊥BC，∴∠ACB=90°，又∵BE是∠ABC的平分线，∴FG=FC，在Rt△BGF和Rt△BCF中，∴Rt△BGF≌Rt△BCF〔HL〕，∴CB=GB，∵AC=BC，∴∠CBA=45°，∴AB=BC，∴====+1．应选：C．9．〔2021•随州〕如图，在△ABC中，两条中线BE、CD相交于点O，那么S△DOE：S△COB=〔〕A．1：4B．2：3C．1：3D．1：2∴DE=BC，D E∥BC，∴=，△DOE∽△COB，∴=〔〕2=〔〕2=，应选：A．10．〔2021•威海〕如图，在以下网格中，小正方形的边长均为1，点A、B、O都在格点上，那么∠AOB的正弦值是〔〕A．B．C．D．解：作AC⊥OB于点C．那么AC=，AO===2，那么sin∠AOB===．应选：D．二．填空题〔共10小题〕11．〔2021•齐齐哈尔〕在Rt△ABC中，∠ACB=90°，CD是斜边AB上的中线，CD=4，AC=6，那么sinB的值是．12．〔2021•贺州〕网格中的每个小正方形的边长都是1，△ABC每个顶点都在网格的交点处，那么sinA= ．：如图，作AD⊥BC于D，CE⊥AB于E，由勾股定理得AB=AC=2，BC=2，AD=3，可以得知△ABC是等腰三角形，由面积相等可得，BC•AD=AB•CE，即CE==，sinA===，故答案为：．13．〔2021•本溪〕在△ABC中，∠B=45°，cosA=，那么∠C的度数是75°．14．〔2021•抚顺〕如图，河流两岸a、b互相平行，点A、B是河岸a上的两座建筑物，点C、D是河岸b上的两点，A、B的距离约为200米．某人在河岸b上的点P处测得∠APC=75°，∠BPD=30°，那么河流的宽度约为100 米．解：过点P作PE⊥AB于点E，∵∠APC=75°，∠BPD=30°，∴∠APB=75°，∵∠BAP=∠APC=75°，∴∠APB=∠BAP，∴AB=PB=200m，∵∠ABP=30°，∴PE=PB=100m．故答案为：100．15．〔2021•济宁〕如图，在△ABC中，∠A=30°，∠B=45°，AC=，那么AB的长为3+．解：过C作CD⊥AB于D，∴∠ADC=∠BDC=90°，∵∠B=45°，∴∠BCD=∠B=45°，∴CD=BD，∵∠A=30°，AC=2，∴CD=，∴BD=CD=，由勾股定理得：AD==3，∴AB=AD+BD=3+．故答案为：3+．16．〔2021•北海〕假设一元二次方程x2﹣6x+m=0有两个相等的实数根，那么m的值为9 ．〔2021•江阴市模拟〕一元二次方程ax2+bx+c=0〔a≠0〕有一根为零的条件是c=0 ．17．18．〔2021•假设函数y=的图象在同一象限内，y随x增大而增大，那么m的值可以是0 〔写出一个即可〕．19．〔2021•阜新〕△ABC∽△DEF，其中AB=5，BC=6，CA=9，DE=3，那么△DEF的周长是12 ．20．〔2021•郴州〕假设，那么= ．三．解答题〔共8小题〕21．〔2021•南平〕如图，△ABC中，点D在AC上且∠ABD=∠C，求证：AB2=AD•AC．22．〔2021•岳阳〕如图，矩形ABCD为台球桌面，AD=260cm，AB=130cm，球目前在E点位置，AE=60cm．如果小丁瞄准BC边上的点F将球打过去，经过反弹后，球刚好弹到D 点位置．〔1〕求证：△BEF∽△CDF；〔2〕求CF的长．〔2〕解：∵由〔1〕知，△BEF∽△CDF．∴=，即=，解得：CF=169．即：CF的长度是169cm．23．〔2021•绥化〕：△ABC在直角坐标平面内，三个顶点的坐标分别为A〔0，3〕、B〔3，4〕、C〔2，2〕〔正方形网格中每个小正方形的边长是一个单位长度〕．〔1〕画出△ABC向下平移4个单位长度得到的△A1B1C1，点C1的坐标是〔2，﹣2〕；〔2〕以点B为位似中心，在网格内画出△A2B2C2，使△A2B2C2与△ABC位似，且位似比为2：1，点C2的坐标是〔1，0〕；〔3〕△A2B2C2的面积是10 平方单位．解：〔1〕如下图：C1〔2，﹣2〕；故答案为：〔2，﹣2〕；〔2〕如下图：C2〔1，0〕；故答案为：〔1，0〕；〔3〕∵A2C22=20，B2C=20，A2B2=40，∴△A2B2C2是等腰直角三角形，∴△A2B2C2的面积是：×20=10平方单位．故答案为：10．24．〔2021•齐齐哈尔〕如图，在平面直角坐标系中，Rt△AOB的两直角边OA、OB分别在x轴、y轴的正半轴上〔OA＜OB〕，且OA、OB的长分别是一元二次方程x2﹣14x+48=0的两个根．线段AB的垂直平分线CD交AB于点C，交x轴于点D，点P是直线CD上一个动点，点Q是直线AB上一个动点．〔1〕求A、B两点的坐标；〔2〕求直线CD的解析式；〔3〕在坐标平面内是否存在点M，使以点C、P、Q、M为顶点的四边形是正方形，且该正方形的边长为AB长？假设存在，请直接写出点M的坐标；假设不存在，请说明理由．解：〔1〕解方程x2﹣14x+48=0，得x1=6，x2=8，∵OA＜OB，∴A〔6，0〕，B〔0，8〕；〔2〕在Rt△AOB中，∵∠AOB=90°，OA=6，OB=8，∴AB==10，∵线段AB的垂直平分线CD交AB于点C，∴AC=AB=5．在△ACD与△AOB中，∴△ACD∽△AOB，∴=，即=，解得AD=，∵A〔6，0〕，点D在x轴上，∴D〔﹣，0〕．设直线CD的解析式为y=kx+b，由题意知C为AB中点，∴C〔3，4〕，∵D〔﹣，0〕，∴，解得，∴直线CD的解析式为y=x+；〔3〕在坐标平面内存在点M，使以点C、P、Q、M为顶点的四边形是正方形，且该正方形的边长为AB长．∵AC=BC=AB=5，∴以点C、P、Q、M为顶点的正方形的边长为5，且点Q与点B或点A重合．分两种情况：①当点Q与点B重合时，易求BM的解析式为y=x+8，设M〔x，x+8〕，∵B〔0，8〕，BM=5，∴〔x+8﹣8〕2+x2=52，化简整理，得x2=16，解得x=±4，∴M1〔4，11〕，M2〔﹣4，5〕；②当点Q与点A重合时，易求AM的解析式为y=x﹣，设M〔x，x﹣〕，∵A〔6，0〕，AM=5，∴〔x﹣〕2+〔x﹣6〕2=52，化简整理，得x2﹣12x+20=0，解得x1=2，x2=10，∴M3〔2，﹣3〕，M4〔10，3〕；综上所述，所求点M的坐标为M1〔4，11〕，M2〔﹣4，5〕，M3〔2，﹣3〕，M4〔10，3〕．25．〔2021•扬州〕关于x的方程〔k﹣1〕x2﹣〔k﹣1〕x+=0有两个相等的实数根，求k的值．解：∵关于x的方程〔k﹣1〕x2﹣〔k﹣1〕x+=0有两个相等的实数根，∴△=0，∴[﹣〔k﹣1〕]2﹣4〔k﹣1〕=0，整理得，k2﹣3k+2=0，即〔k﹣1〕〔k﹣2〕=0，解得：k=1〔不符合一元二次方程定义，舍去〕或k=2．∴k=2．26．〔2021•新疆〕如图，要利用一面墙〔墙长为25米〕建羊圈，用100米的围栏围成总面积为400平方米的三个大小一样的矩形羊圈，求羊圈的边长AB，BC各为多少米？解：设AB的长度为x，那么BC的长度为〔100﹣4x〕米．根据题意得〔100﹣4x〕x=400，解得 x1=20，x2=5．那么100﹣4x=20或100﹣4x=80．∵80＞25，∴x2=5舍去．即AB=20，BC=20．答：羊圈的边长AB，BC分别是20米、20米．27．〔2021•随州〕楚天汽车销售公司5月份销售某种型号汽车，当月该型号汽车的进价为30万元/辆，假设当月销售量超过5辆时，每多售出1辆，所有售出的汽车进价均降低0.1万元/辆．根据市场调查，月销售量不会突破30台．〔1〕设当月该型号汽车的销售量为x辆〔x≤30，且x为正整数〕，实际进价为y万元/辆，求y与x的函数关系式；〔2〕该型号汽车的销售价为32万元/辆，公司方案当月销售利润25万元，那么该月需售出多少辆汽车？〔注：销售利润=销售价﹣进价〕解：〔1〕由题意，得当0＜x≤5时y=30．当5＜x≤30时，y=30﹣0.1〔x﹣5〕=﹣0.1x+30.5．∴y=；〔2〕当0＜x≤5时，〔32﹣30〕×5=10＜25，不符合题意，当5＜x≤30时，[32﹣〔﹣0.1x+30.5〕]x=25，解得：x1=﹣25〔舍去〕，x2=10．答：该月需售出10辆汽车28．〔2021•呼伦贝尔〕如图，在平面直角坐标系xOy中，一次函数y=kx+b的图象经过点A〔1，0〕，与反比例函数〔x＞0〕的图象相交于点B〔2，1〕．〔1〕求m的值和一次函数的解析式；〔2〕结合图象直接写出：当x＞0时，不等式的解集．解：〔1〕∵反比例函数y=〔x＞0〕的图象经过点B〔2，1〕，∴将B坐标代入反比例解析式得：m=1×2=2，∵一次函数y=kx+b的图象经过点A〔1，0〕、B〔2，1〕两点，∴将A和B 坐标代入一次函数解析式得：，解得：，∴一次函数的解析式为y=x﹣1；〔2〕由图象可知：当x＞0时，不等式kx+b ＞的解集为x＞2．第 11 页。

九年级英语新人教版unit1--3测试题(2021年整理)

九年级英语新人教版unit1--3测试题(word版可编辑修改) 九年级英语新人教版unit1--3测试题(word版可编辑修改)编辑整理：尊敬的读者朋友们：这里是精品文档编辑中心，本文档内容是由我和我的同事精心编辑整理后发布的，发布之前我们对文中内容进行仔细校对，但是难免会有疏漏的地方，但是任然希望（九年级英语新人教版unit1--3测试题(word版可编辑修改)）的内容能够给您的工作和学习带来便利。

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2014年九年级英语Unitsc1——4测试题一．选择填空(25分）( ）1.You can improve your English________reading more.A。

in B。

with C.of D.by( )2。

( )3.—-—I don’t have a partner to play tab le tennis with.—--Why _______a sports club to practice a lot?A。

don't you join B. not to join C。

not joining D.don’t join（）4.They find ________difficult to understand the teacher when she talks.A。

it B。

that C this D.its( )5.Tom was late for class______the bad weather.A.since B。

with C.because D because of ( ）6。

______he is very young ，______he knows a lot about science.A.Because;soB.Although； but C。

人教版九年级英语 Unit1 ---unit3 单元同步测试含答案

Unit1 How can we become good learners?一、选择填空（）1.Susan never gets upset when she has to wait in line. She is very .A.shyB. honestC. funnyD. patient（）2.--Have you heard that the judge passed the ？--Yes，the thief will be punished for what he has done.A. noticeB. matterC. patternD. sentence（）3.-Look！Mary's is changing from surprise to excitement.-Yeah. This result is really unexpected for her.A. conversationB. expressionC. patternD. explanation（）4.-I feel empty and bored these days.-Why not what you enjoy and do that？A. discoverB. createC. inventD. grow·（）5.-Henry lost his job，but he tried to keep it from his family.-I think he should tell his family the truth.A.activeB.patientC.quietD.secret（）6.-I don't want you to a word of this to anyone.-OK！Just trust me. I will keep my mouth tightly shut.A.memorizeB.reviewC.rememberD.repeat（）7.-We can't go shopping now because of us has money on us.-Then when shall we go？A.all；noB.any；noC.none；anyD.no one；any（）8.-I didn't that he had gone. So I waited there for a couple of hours.-But why didn't you call him？A.watchB.noteC.meanD.connect( ) 9.-I think people drive, air pollution there will be.-That's true. I hope the air will be fresher soon.A. the less; the lessB. the less; the fewerC. the fewer; the fewerD. the fewer; the less( )10.-Jenny might feel sorry for you.-That's impossible. .I know what kind of person she is.A. I wasn’t born yesterdayB. Good for youC. Thanks a lotD. That’s for sure二、完型填空perhaps the only test score that I remember till now is the 55 when I was in high school The test was the final for a course，I remember that I was waiting anxiously as my teacher Mr. Right. 1 our papers one by one. It was a rather difficult test. I heard my classmates groaning(发牢骚) and I could . 2 by the groans that the scores were not looking good.Just then, Mr. Right put my paper on my desk. There in big red umbers，circled to draw 3 ，was my score，55！I lowered my bead，and 4 the score up quickly. A 55 was not something that I wanted my classmates to see."The scores were not very good， 5 of you passed，"Mr. Right said. "The highest score in our class was a 55."A 55.That's me！Suddenly，my 6 didn't look so bad. I had the highest score. I felt much 7 .I walked home 8 that day with the low but high score. My fatherasked me as soon as I got home，“How did you do in your test”"I made a 55，"I said.A frown（皱眉）immediately 9 on my father's face. I knew I had to explain at once. “But Dad，I had the highest score in the class." I proudly stated. I thought that explanation would make a 10 .“You didn't 11 ! "my father replied. “But it's the highest! "I insisted."1 don't care what scores others had，but you failed. What 12 is what you do！"my father firmly said，For years，my father has always been that way. He never noticed what others did. Instead, he just always cared whether I did it 13 .We often don't completely understand our 14 parents until we ourselves stand in his parents’ sh oes. My father's words left lasting 15 in my mind.（）1. A. hung out B. checked out C. brought out D. gave out（）2. A. note B. tell C. report D. create（）3. .A. speed B. painting C. attention D. lesson（）4. A. covered B. put C. held D. picked（）5. A. No one B. Neither C .None D. Nobody（）6. A. connection B. expression C. mood D. pattern（）7. A. more shameful B. more nervous C. more patient D. easier ( ) 8. A. alone B. wildly C. lonely D. typically（）9. A. left B. blew C. flew D. stood( ) 10. A. promise B. difference C. living D. decision( ) 11. A. lose B. improve C. succeed D. pass（）12.A.matters B. means C. makes D. reaches( ) 13. A. especially B. mostly C. excellently D. peacefully( ) 14. A. silly B. strict C. kind D. truthful( ) 15. A. performance B. signs C. memories D. pressure三、阅读理解( )1. How are the books on this webpage listed?A. By price.B. By popularity.C. By reader's age.D. By writer's name.( )2. What is true about the book Women in Science?A. It is mainly about Marie Curie's history.B. It lists all the important scientific achievements.C. It includes women scientists that are not famous.D. It is mostly about the development of modern science.( )3. How much will a Bestbooks Book Club member pay in total if he orders First Big Book of How and A Really Short History of Nearly Everything today?A.$34.B.$30.C.$26.D.524.( )4.A primary school student who needs to write a science report about African elephants should chooseA. Women in ScienceB. First Big Book of HowC. A Really Short History of Nearly Everything.D. National Geographic's First Big Book of the World( )5. What is the main purpose of this webpage?A. To sell books to young readers.B. To attract new book club members.C. To encourage students’ interest in science.D. To review books young readers might like.BUsing iPads to Make Learning FunPaper，pencil，whiteboard，textbook are the tools you need if you want to go to school. But recently，you can add another one to the list；an iPad.The popular Apple tablet is not only useful for searching the Internet and watching videos，it is also being used to make learning fun.Scientists now know that we learn better when we are enjoying ourselves，so recently software developers have made iPad applications （应用程序）that look like video games，but have strong educational content. One of the best examples of this new form of teaching applicationis Futaba，a game in which up to four children try to recognize a spinning （旋转的）object，and then identify what it is. The game can be used to teach English，math，foreign languages，or just about anything，and students love it. Teachers can even make their own questions. The important thing is that children enjoy the game，and don't even realize how much they are learning！So the next time you have to choose between making your child study or letting them play games，just remember-they could do both at the same time！（）1.What can be added to the school thing list according to the passage？A. An iPad.B. An English textbook.C. A pencil.D.A whiteboard.（）2.What does the underlined word "tablet” probably mean in Chinese in this passage？A.软件B.平板电脑C.系统D.移动电脑（）3.Futaba isA.an old kind of classroomB. a new outdoor activityC. a new educational applicationD. a very old tool of teaching（）4.How many children can take part in one Futaba game at a tine？A.7.B.6.C.5.D.4.（）5.Which of the following is No True according to the passage？A. Scientists think that we learn beer when we are enjoying ourselves.B. Futaba can only be used to teach languages.C. Teachers can make their own questions using Futaba.D. The writer thinks children can study and have fun playing games at the same time.CFor his eleventh birthday. Lin was given a gift that would shape is his life .on that day his father took him to the Children's Activity Center and said he could choose any course that interested him There was just onerequirement: Lin would have to promise to study it for at least one year.To that point Lin had had many hobbies, but none kept his interest for more than a week or two. His mom once gave him a bag of stamps to encourage stamp collecting. That hobby lasted a week. Then his father got him some paints, hoping that Lin's artistic side would shine through Those paints were now under his bed, still unopened. This time Lin's parents would let him decide.Lin's eyes moved down the noticeboard that listed all the courses on offer. He stopped at "Photography". He liked the idea of taking beautiful pictures, but the notice said that each student needed their own camera. Although Lin's family were not poor, they were not rich either, and a camera cost a lot of money. He continued looking.The next course to catch his eye was "Language Art". He didn't even know what that meant.His father explained that it taught people bow to make public speeches. Lin, a shy boy, could think of nothing worse.Then he saw it. "Cooking" sounded like something he would like to do. It was inexpensive and convenient; it could be done alone and it was also creative.Based on Lin's hobby history, his dad had double, out he agreed. Much to his parents'surprise, Lin kept his promise. He studied cooking at the Center every Saturday, and practiced at home, making delicious meals for his family, Everyone looked forward to birthdays, when they could eat his cakes. Lin go great satisfaction from the pleasure his food brought to others.The months turned to years, but his hobby never changed again.Now Lin is an adult and runs a successful restaurant. When customers say they enjoy his meal, he still gets the same pleasure he did as a child, and remembers the special gift he received all those years ago.( )1. Why didn't Lin choose to study photography?A. It was too expensive.B. He had no interest in it.C. He was not very creative.D. It was not offered that tem( )2. The underlined expression "catch his eye" in Paragraph 4means"A. make him excitedB. make him surprisedC. get his attentionD. help him see clearly( )3. Which of the following best describes Lin's interest in cooking?A. It only lasted for a short time.B. It seemed to match his character.C. It was forced on him by his parents.D. It developed slowly over many months.( )4. Why did the father have doubts about Lin's choice of cooking?A. Lin was not good at cookingB. Cooking was not very convenient.C. He didn't think Lin would continue.D. Cooking was not a good hobby for a bay.( )5. What's the best title for the passage?A. A Strict FatherB.A Changeable BayC. The Fun of CookingD. The Birthday Gift四、短文填词AHow can we practice our spoken English？The first and most important thing is to believe y 1 . You should always have confidence to improve your English.You should often encourage yourself，“Come on，don’t be afraid！"You should never lose heart and never g 2 up .Maybe you are afraid of l 3 face , but you should think we are students and we’re learning , and there’s no need to w 4 about anything. You must always be active in practice. There’s no doubt that your p 5 and intonation can’t be as good as the local people b 6 we are Chinese , and we don’t have chances to live in foreign countries and t 7 with the people there all the time. But you must know that the main way to study English is to make ourselves u 8 and understand other people . You should believe that native speakers willnot l 9 at you , instead they will encourage you. If you are brave enough , you’ll certainly be b 10 at speaking English than before.Don’t be shy or afraid! Just have a try.1.y2. g3. l4. w5. p6. b7. t8. u9. l10. bBIt is important to have good learning habits if you want to study ,and this is especially true when it comes to online learning.Online learning is a process d 1 from what you will find in a traditional school , for the learning environment and methods are different.When studying in a c 2 , there is a lot of communication between the students and the teacher , but little interaction among the students , while online learning helps one student and a 3 to interact closely. So one of an online professor’s roles is toe 4 students to interact. Another role is to guide discussion but not to take total c 5 of students’ thoughts as teachers do in a classroom. So what are the good learning habits you should have in online learning? Here are some good suggestions. First , it is a good idea to p 6 well for online learning. You can write down daily tasks and even weekly tasks that you want to complete. By doing so ,you will have a good plan for a 7 your goals. Second, you should spend as much time online as if you were going to regular c 8 . Also , always try to set aside extra time to communicate with other students.B 9 this , any post you send online shows who you are. So make sure that you spell every word and write every s 10 correctly. Last, hand in your homework on time so that you won’t fall behind.1.d2. c3. a4. e5.c6.p7.a8. c9.b10.s答案：一、选择填空题1-5 DDBAD 6-10 DCBDA二、完型填空1-5 DBCAC 6-10 BDADB 11-15 DACBC三、阅读理解A: 1-5 BCDDAB: 1-5 ABCDBC: 1-5 ACBCD四、短文填词A：1.yourself 2.give 3.losing 4.worry5.pronunciation6. because7.talk8.understoodugh 10.betterB:1.different 2.classroom 3. another 4.encourage 5.Control6.prepare7. achieving8.courses/classes9. Besides10.sentenceUnit 2一. 单项选择1. 一These mooncakes are delicious.-- Yes. But I think the ones with nuts are ________of all.A. deliciousB. more deliciousC. the most deliciousD. the delicious2．I just wonder ______that makes him so excited.A. what he doesB. what it isC. what is itD. what does he3. She is an honest girl. I ________her.A. believeB. believe inC. believe toD. believe on4. They enjoy ________for a walk after supper.A. goes outB. going outC. go outD. to go out5. They will visit our farm________ two weeks.A. inB. afterC. atD. on6. I think it’s polite ________seats to ________on the bus.A. to give；othersB. give；otherC. to give；the othersD. give；the other7. I’m going to travel ________ .A. an interesting placeB. somewhere interestingC. interesting somewhereD. interesting anywhere8. 一How soon will you come back? -- ________.A. In two weeksB. After two weeksC. About two weeksD. At two weeks9. In Chiang Mai，April is ________of the year.A. the hottest monthB. the hotter monthC. the hot monthD. the hotest month10. Oh，it’s four o’clock. It’s time _____football.A. with playB. to playingC. with playingD. for playing11. The accident happened ________7 pm ________9 pm.A. from；toB. between；toC. from；andD. between；and12. I don’t know ________he will come. If he comes，I’ll let you know.A. whetherB. whoC. thatD. where13. The box is ________ of all.A. heaviestB. the bigestC. the heavierD. the biggest14. ________，English，math or Chinese?A. What do you like bestB. Which do you like bestC. What do you like betterD. Which do you like better15. 一Today is sunny. Let’s go fishing. —________like a good idea.A. LooksB. SoundsC. SmellsD. Sound16. I ________ a black coat today.A. wearB. put onC. inD. dress17. ________nice music it is!A. What aB. How aC. WhatD. How18. ________ clever the girl is!A. What aB. How aC. WhatD. How19. He ________ the money and paid for the book.A. took offB. took awayC. took outD. took in20. It is clever _____you ____work out the math problem.A. for；toB. of；toC. with；toD. for；with21. 1 want to take the box____ there.A. forB. withC. /D. to22. 一I’m sorry to wake you up so early. -- ________.A. That’s rightB. With pleasureC. Good ideaD. It doesn't matter23. My brother promises ________again.A. to tell liesB. don’t liesC. not tell liesD. not to tell lies24. Could you ________the old things in the past?A. think ofB. think aboutC. think overD. think25. I ________a lot of time on computer games. It’s a good way to kill time.A. costB. spendC. takeD. use26. Yao Ming is ________a basketball player.A. famous forB. famous asC. famous withD. famous in27. I saw boys ________football in the playground at 10 o’clock in the morning.A. playedB. to playC. were playingD. playing28. The doctor warned me not ________anymore.A. smokeB. to smokeC. smokingD. smoked29. After working her way around the world，she ended up ________English as a foreign teacher.A. to teachB. teachesC. teachingD. are teaching30. It’s time to get up，let’s ______.A. wake him upB. wake up himC. waking up himD. waking him up31. We must promise to look after the animals ________ .A. wellB. goodC. niceD. happy32. I can’t decide ________.A. to choose which presentB. choose which presentC. which present to chooseD. to which present choose33. Please ________ when the train will leave.A. findB. look outC. find outD. look34. If you climb mountains in such bad weather，you ________trouble.A. ask forB. have asked forC. will ask forD. are asking for35.We shouldn’t throw rubbish _____in public places.A. everywhereB. anywhereC. nowhereD. somewhere36. His words remind me ________we did together during the past holiday.A. thatB. of thatC. whatD. of what37.The teacher didn’t tell me ________.A. what should I doB. how to doC. what to do itD. what to do38. Between the hotel and the park ______ a library.A. isB. areC. haveD. has39. There are many ways ______ your English.A. to doB. to improveC. doingD. improving40. I have something_______ .A.asking youB. asked youC. asks you D .to ask you41. Please show _____how to _______ .A. me；cook B。

九年级下1-3章试卷

九年级（下）科学1—3单元测试卷一、单项选择题（每小题2分，共40分）1、下列关于生物进化规律的叙述中，错误的是（） A．由低等到高等 B．由简单到复杂 C．由水生到陆生 D．由大型到小型2、下列叙述中，不．正确的是（）A．化石为生物进化提供了直接的证据B．“始祖鸟”是鸟类进化成哺乳类的典型证据C．在人类进化过程中，发生显著变化的是脑容量增加D．达尔文提出较为完善的生物进化学说，其核心是自然选择3、子女的一些形态非常像他们的父母，这是因为他们（） A．与父母生活在相同的环境中 B．与父母吃的食物大致一样C．具有父母双方的遗传物质 D．受父母的熏陶4、2001年，科学家培育出了“超级鼠”，其肌肉质量超过普通鼠4倍，且寿命更长，原因是它们体内多了一份特殊的基因。

科学家获得这种超级鼠的方法属于（）A．发酵技术 B．克隆技术C．组织培养 D．转基因技术5、东北某林区，山脚是落叶阔叶林，山腰是红松林，山顶是冷杉林，影响这种分布状况形成的主要环境因素是（）A．阳光 B．温度 C．水 D．土壤6、下列属于生态系统的是（）A．一只大象 B．一群飞鸟 C．一片树林 D．一朵彩云7、水俣病是由于汞中毒引起的，在“水草→虾→鱼→鱼鹰”食物链中，体内汞含量最高的是（）A．水草 B．虾 C．鱼 D．鱼鹰8、关于食物链的写法，以下正确的是（）A．阳光草蚱蜢鸡 B．鹰鸡蚱蜢植物 C．田鼠蛇鹰 D．植物蚱蜢鸡鹰9、某公司在组织职员体检时，发现有四名职员分别患有肺结核、糖尿病、色盲、甲型肝炎等疾病，那么与他们共同工作、生活的人可能被传染的一组疾病是（）A．肺结核、糖尿病 B．肺结核、甲型肝炎C．色盲、甲型肝炎 D．糖尿病、色盲10、下列不属于进入青春期后正常心理表现的是（） A．自我意识增强 B．不喜欢和周围同学说话C．对异性有较强的交往欲望 D．对所属集体有强烈的归属感和依赖感11、属于特异性免疫的是（）A．皮肤的屏障作用B．胃液的杀菌作用C．注射狂犬疫苗 D．白细胞吞噬病菌12、卫生部公布的2011年全国法定传染病疫情报告显示，在乙类传染病中，居病死率榜首的竟是狂犬病。

九年级化学第1-3单元综合测试题试题

曾都区府河镇中心九年级化学第1-3单元综合测试题新人教版制卷人：歐陽文化、歐陽理複；制卷時間：二O二二年二月七日考号________. 姓名________ .班级可用到相对原子质量：H—1 O—16 Fe—56 C---12第一卷 (选择题，本卷一共16分。

)一、选择题〔在每一小题列出的四个选项里面,请将你认为正确的代号填在卷Ⅱ的答题栏中〕1以下所示的变化中，属于化学变化的是A B C D2以下有关指定容器中水的主要作用的说法，错误的选项是．．．．．．实验装置硫在氧气中燃烧测定空气中氧气含量铁丝在氧气中燃烧探究燃烧的条件主要作用集气瓶中的水：吸收反响放出的热量量筒中的水：通过水体积的变化得出空气中O2体积分数集气瓶中的水：冷却溅落的熔融物，防止集气瓶炸裂烧杯中的水：加热铜片温度，隔绝空气选项 A B C D 3. 如图，保温瓶中装有液态空气，翻开瓶盖，将一根燃着的木条置于瓶口的上方，以下说法正确的选项是A.木条燃烧更旺，因为瓶内液态空气汽化后，产生O2B.木条燃烧情况不发生改变，因为瓶内盛放的也是空气C.木条燃烧先旺后灭。

因为瓶内液态空气汽化后，先产生O 2后产生N 2D.木条熄灭，因为瓶内液态空气汽化后，使瓶口温度降低，且先产生N 2,不支持燃烧 4. 水是生命之源，我们应该理解水.保护水资源。

以下说法错误的选项是 A.为使水中的悬浮杂质沉降，可在水中加人适量的明矾B.高锰酸钾溶液稀释后溶液颜色变浅红甚至变为无色，是因为构成高锰酸钾的微粒变小D.5mL 水和5mL 酒精混合，溶液体积小于10mL ，说明分子间有空隙5. 某种耐火材料的主要成分为CaMg 3Si 4O x ，其中硅元素为+4价，那么化学式中X 的值是 A.14 B.12 C6 右图是A 、B 两种固体物质的溶解度曲线。

以下说法中错误的选项是1℃时A 、B 的溶解度相等2℃时，A 的饱和溶液中溶质的质量分数为100a×100% C.A 、B 的溶解度都随温度升高而增大2℃时B 的饱和溶液降温到t 1℃时，溶液变稀了7. 将质量相等的a 、b 两块金属，分别放入质量和溶质质量分数都一样的足量稀硫酸中，生成氢气的质量(m)与反响时间是(t)的关系，如以下图所示。

九年级英语1-3单元测试题

英语九年级第(1-3)单元测试题一. 选择填空〔共30小题，每题1分，计30分〕( ) 1. He learnt English by ____________ English songs.A. listenB. listen toC. listeningD. listening to ( ) 2. If you practice ________ English every morning, you will improve it quickly.A. to readB. readingC. readD. be reading ( ) 3. It’s Sunday today. What about __________ the mountains?A. to climbB. climbC. climbingD. climbed( ) 4. Tom decided __________ in China.A. travelB. travelingC. to travelD. traveled ( ) 5. Do you enjoy __________ on the Internet?A. surfingB. surfC. to surfD. surfed ( ) 6. She said she had some trouble ___________ her homework.A. finishB. finishingC. to finishD. finished ( ) 7. We should go to school at 8:00 ______________ school mornings.A. atB. inC. onD. of( ) 8. Can you tell me the best way ________ the problem?A. solveB. solvedC. to solveD. solving ( ) 9. Jenny does not know where __________ on National Day.A. to goB. goingC. goesD. will go ( ) 10. I spend some time ________ newspaper every dayA. readB. readingC. to readD. on read ( ) 11. _____ you work harder ,you will not pass the examination .A. Until B .If C. Till D. Unless( ) 12. There is ______milk in the bottle. Let’s go to buy some.A. a littleB. littleC. a fewD. few ( ) 13. Did you see them _______ basketball this morning?A. playingB. playC. to playD. are playing ( ) 14. My father gave up ________ at last.A. smokeB. smokingC. to smokeD. smokes ( ) 15. I spent half an hour ___________ my homework .A. finish doingB. to finish doingC. finishing to doD. finishing doing( ) 16.Can you tell me how much ____________ to buy this book?A will it costB does it costC it costsD it is cost( ) 17. Have you decided which coat_______?A. chooseB. choosingC. chosenD. to choose ( ) 18. I read very slowly. I can’t spell some English words, _____.A. alsoB. eitherC. but D too( ) 19. Lucy thinks that ____ English movies isn’t a good wayA. watchB. watchedC. watching D watches( ) 20. At first they hated each other ,but they ended up _____ on very well .A. getB. gotC. gettingD. to get( ) 21. Mario is afraid of alone.A. beB. beingC. isD. /( )22 –Listen, Someone is playing the piano.-Wow,_______ beautiful music !A WhatB HowC What aD How a( )23. I haven’t him for a long time.A. seeB. sawC. seenD. seeing( )24. If you don't know a word ,you can ______ in a dictionary A look it up B look at it C look it over( )25.----- You used to be short, you ?------Yes , I .A.didn’t, didB. usedn’t, usedC. didn’t, usedD. usedn’t, did( )26. Playing basketball is very , so I’m more in it.A. interesting, interestingB. interested, interestingC. interesting, interestedD. interested, interested( )27. ----Who do you often swim ?-----I swim with my classmates, because I am the swim team.A. /, onB. with, onC. with, inD. with, of( )28. The glass is broken, Try to who did it.A. find outB. lookC. seeD. found( )29. My life has changed in the last few years.A. a lot ofB. lots ofC. a lotD. a lots of( )30 He’s always busy. And he working late until night.A. gets used toB. used toC. got used toD. is used for二. 完型填空〔共10小题，每题1分，计10分〕ASmall cars may take the place of〔代替〕big cars in the future〔将来〕. There is 1 for only two people in such a car. If everyone 2 such a car , there will be less pollution 3 〔污染〕the air. There will also be more space for 4 cars in cities, and the streets will be less crowded. The little cars will cost 5 less. Driving will be 6_ ,too, as these little cars can go only 65 kilometers per hour. If big cars are still used along with the small 7, two sets of road will be8 in the future. Some roads will be used 9 the big, fast cars, and 10 roads will be needed for the slower small ones.( ) 1. A. place B. space C. a room D. seat ( ) 2. A. rides B. drives C. pushes D. pulls( ) 3. A. for B. on C. in D. at ( ) 4. A. stopping B. stop C. parking D. park ( ) 5. A. lots of B. many C. much D. more ( ) 6. A. danger B. dangerous C. safe D. safer ( ) 7. A. one B. ones C. seat D. seats ( ) 8. A. need B. needing C. needs D. needed ( ) 9. A. as B. by C. for D. in ( ) 10. A. the other B. the another C. another D. other三. 阅读理解〔共25小题，每题2分，计50分〕AHow I study English？I often hear some students say English is difficult, and it gives them a headache. So they can’t learn it well. But English is very easy for me. I’m good at it. I’m very glad to tell you something about how I study English.First, I think an interest(爱好)in English is very important. When I was in Grade One, we had a new subject – English. It was fresh for me . I was interested in it, so I worked hard at it. Soon we had an English exam and I got a very good mark. How happy I was! After that, I learned English harder and harder. Our English teacher often teaches us English songs, the songs sound nice. I often think how interesting English is!Second, I think English is a foreign language. I should learn it well in the following ways: Listen to the teacher carefully, speak bravely, read aloud and have a good vocabulary. Then practice again and again, never be tired. And I also have a good habit: Asking whenever I have a question, I must make it clear by asking our English teacher. How happy I am when I understand!Besides this, I often read English stories, jokes and easy novels. From these I know English is not only interesting, but also useful. They help me understand a lot of things. So to do more reading is an important way to learn English well.And I also do some exercises from our class magazines, and I often write English diaries. English has become a close friend of mine.Now I have learned English for more than two years. I always keep the first position in our school. From these words, I hope every student can learn English well.( )1.Why do some students often “have a headache〞?A. Because they are easy to catch cold.B. Because it’s often very coldC. Because they think English is easy.D. Because they don’t think English is easy.( )2 The writer tells us that we should be ____in English if we want to learn it well.A. interestB. interestedC. interestingD. strict( )3.The sentence “I got a very good mark〞 means ______.A.I got a good way.B. I had a good idea.C. I did badly in the exam .D. I did well in the exam.( )4.The writer thinks English is interesting because________.A. English is full of stories.B. English is fullof jokes.C. his teacher often teaches them nice English songs.D. of nothing( )5.Which of the following is not the way the writer studies by?A. speaking bravelyB. Writing to foreign friendsC. Reading aloudD. Writing English diariesBSwimming and English LearningCan you swim? Do you like swimming? Yes? Well, how can you learn toswim? I think the best way is to go into the water and learn. I’m afraidyou’ll never learn to swim just by reading books about swimming or lookingat others swimming. It’s the same with the English study. We must practice,practice and practice.Listening and speaking are very important for beginners. The childrenin English-speaking countries first listen to others. Then they try toimitate and speak. We can listen to English programs on radio. You mayjust understand a few words. It doesn’t matter. Just be relaxed, tryto catch every word.Somebody may be a good listener. But he dare not speak. He’s afraidof making mistakes. You know we sometimes make mistakes when we speakChinese. Don’t be afraid. We must be brave. If you really want to learnEnglish well, you must try to speak with everyone so long as he knowsEnglish. Whether you know him or not is not important when there’s nobodyto talk with, you can talk to yourself in English. It’s interesting andalso a good way to practice your spoken English. Remember, the more youspeak, the fewer mistakes you’ll make.Reading and writing are more important for senior school students.First we must choose the books we’re interested in. A lot of readingwill improve your language sense. This is the most important.Keep writing English diaries. We can also write English articles.You may even post them to English magazines. Don’t be afraid of failure.Failure is the mother of success.Easier said than done. Well, let’s do more practice from now on.I’m sure you’ll learn English well in this way.( )6You can learn to swim by_______.A. reading books about itB. looking at others swimmingC. having lessons on itD. going into the river and learning( )7. We should learn English by _______.A. listening and speakingB. reading and writingC. A and BD. swimming( )8. What will you do with mistakes when you speak?A. Don’t make mistakes.B. Study hardC. Try not to speak EnglishD. Don’t be afraid.( )9. What’s more important for senior school students?A. listeningB. speakingC. reading and writingD. learning( )10. We can listen to English ______, according to the passage.A. by trainB. on the radioC. every minuteD. now and then CJOLIN Tsai (蔡依林), a famous singer, has become an English teacher! But she is not staying in a classroom to give you talks in English. Instead, she has published a new book, “Jolin’s English Diary Book〞. It came out in Taiwan in March. Jolin is helping you learn English in a light hearted way and give you useful words for life outside your textbooks. “I hope it’s a happy English book,〞 she said, “When you learn English in a fun way, you will keep on doing it.〞 This certainly doesn’t mean just reciting words. Jolin has a lot of clever ways of learning. She likes to listen to English songs or find friends to talk to in English. She has been good at English since Grade 3 in primary school . Because of this, she hosted news program on the radio herself. Jolin knows it’s important to put English to good use. So, in her English diaries, she wrote something about her everyday life, like study, fashion , travel and family. After each diary, she gives you lots of notes. You can use them often, too! Jolin also asks you to keep diaries like hers.( )11. When did Jolin Tsai publish “Jolin’s English Diary Book〞 ?A. In MayB. In AprilC. In March( )12. She has been good at English ___.A. since she became a famous singerB. since she was in Grade 3C. since she was in college (大学)( )13. Jolin thinks that ___ is important for us to learn English.A. just reciting wordsB. hosting a program on the radioC. putting English to good use( )14. What’s the meaning of “light-hearted〞 in the passage?A. 轻松愉快的B. 漫不经心的C. 迷迷糊糊的( )15. From the passage we know that ____.A. she is not only a famous singer but also an English teacher in a primary schoolB. you don’t have to keep English diariesC.Jolin Tsai shows us how to learn English in a fun wayD"Who needs a shopping mall if you have Taobao?" says Wang Lin, 28,a writer in Beijing.Taobao, China's largest online shopping site (网上购物站), has become an important part of Wang Lin's life. She spends lots of money on Taobao. A growing number of Chinese Internet users like Wang have found the joys of online shopping. Most online shoppers are students or young people. More women shop online than men. Clothing and home-use products (产品) are the most popular online. It was reported that more than 250 billion yuan was spent on online shopping last year, 80% through Taobao. Taobao means "looking for treasure" in Chinese. People can find almost everything they need on Taobao, from clothes to books, from candies to DVD players. You may question the security ofonline shopping, Wang Lin said, "It's very safe and convenient. Unless you receive the products from the sellers and are satisfied with them, the shop owner will not get the money. You can also get your money back if you want to return the products."( )16. What are the most popular online?A. Candies and DVD players.B. Treasure productsC. Clothing and home-use products.( )17. Taobao is __________ .A. a shopping mallB. an online shopping siteC. an online shopper( )18. Most online shoppers are .A. youngB. middle-agedC. rich( )19. In the last paragraph, the underlined word "them" refers to (所指) " ____________ ".A. the shop ownersB. productsC. sellers( )20. Which is the best title of the passage?A. Wang Lin's lifeB. Online shopping in ChinaC. China's online shoppersEMobile phone ( )has become a problem for middle schools. Some middle schools in Australia have banned (禁止) students from carrying mobile phones during school hours. Mobile phone use among children has become a problem for the schools this year. Several children have got mobile phones as Christmas presents, and more students want them. Mary Bluett, an official(官员), said mobile phone use is a distraction(分心) to students during school hours and it also gives teachers so much trouble in their classrooms. Teachers were also saying that sometimes students might use phone messages to cheat during exams. She said some schools had tried to ban mobile phones. Some parents felt unhappy, because they couldn’t get in touch with their children. Many teachers said studentsshould not have mobile phones at school, but if there was a good reason, they could leave their phones at school office. They also said there were many reasons why the students should not have mobile phones at school; they were easy to lose and were a distraction from studies. Many people say that they understand why parents would like their children to have phones, but they think schools should let the students know when they can use their mobile phones.( )21. Some middle schools in Australia have banned students from carrying mobile phones ____.A. because they are studentsB. when they are freeC. when they are at school( )22. We know from the passage that some children get mobile phones from _______.A. the makers and sellersB. the passers-by and strangersC. their parents and friends( )23. What does the word “cheat〞 mean in the passage in Chinese?A. 聊天B. 作弊( )24. Some parents felt unhappy because they couldn’t________ during school hours.A. use their mobile phonesB.get in touch with their childrenC. help the teachers with their work( )25.The passage tells us that_______.A. students shouldn’t have mobile phones at school except for some special reasonsB. it is impossible to ban students from using mobile phone at schoolC. some parents felt unhappy because they couldn’t Use their phones at school第四局部：口语应用〔补全对话〕〔共5小题；每题1分，总分值5分〕从对话后的七个选项中选择五项适当的选项补全对话，将其字母代号填入下面相应的横线上。

九年级化学1至3单元测试题

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（1）食用碘盐可以预防碘缺乏病，市售加碘盐包装袋上注明：每千克含碘20~50mg，这里标明的碘是指_______________（2）氢气能燃烧，氧气不能燃烧的原因是___________________________ （3）在一个玻璃容器中加入100毫升水，向水中放入一块糖，立即在容器外壁沿液面画一水平线，过一会，发现糖块不见了，液面比原来水平线降低了，该现象说明了①________________；②___________________________10、想学好化学必须要学好化学用语，用化学用语表示：（1）3个铝原子____________ （2）硫离子______________ （3）2个镁离子_____________ （4）铁这种物质____________11、将下列物质按要求分类（填序号）①氧气②人体呼出的气体③液氮④加热高锰酸钾完全分解后的固体剩余物⑤五氧化二磷⑥新鲜空气其中属于混合物的是________________ 纯净物的是_______________ 12、下列事实说明空气中含有哪些成分？（1）酥脆的饼干在空气中放置一段时间会变软是因为空气中含______________（2）澄清石灰水长期露置在空气中会变浑浊是由于空气中含_______________三、简答题13、（1）、⑤表示的粒子属于___________元素（选填“金属”或“非金属”）（2）、其中属于同种元素的粒子是____________（3）、写出③粒子的符号___________14、某粒子结构示意图为它与①、②、③、④、⑤、中哪种粒子的化学性质相似___________。

人教版九年级英语 Unit1--3 单元复习测试题(含答案)

人教版九年级英语unit1--3 单元复习测试题Unit 1一、词汇运用A. 选择方框内的词填空。

1. Both of you pronounce correctly, because this word has two __________.2. You should take ______ carefully when you are having English classes.3. What about reading ______ to practice your spoken English?4. __________ the new words is a great challenge for every English learner.5.In my opinion, as long as you use your money ____, there is nothing wrong to be rich.B、根据汉语意思填空。

6. When you are in a 400-metre race, _______(速度) is the most important.7. Wide reading will _________ (增加) your vocabulary.8. It is Columbus that ________（发现）the continent of America over 500 years ago.9. As you know, the ______ （秘密）to success is hard work.21cn10. He said that he had no interests in ______ (化学), so he ________(失败) in the latest test.11. He often ________ (联系) what he reads with what he sees around him.12. The _________ (表情)on her face suggests that she has made it clear about this matter.13. "Rome was not built one day." So please be __________(耐心), it takes time.14. Many of us didn’t pay ___________（注意）to the importance of the eye care.二、语法填空You must have been around 16 years old. Are you ________ from that when you were 9 years old? Are you__________ (wonder) if you have already grown up? You may be a physical adult before you finish _______(study). Some people may finish their growing at high school, _________ others are still growing after they leave school. Even when puberty (青春期) is over and you think you are a grown-up, you’ll still face some physical and relationship problems that you should_________ with.Parents are very ________ (help) for your growing, but it’s not necessary for them to do everything for you. Sometimes you might have your________ idea. What they should do is to make sure that you can make your own______. Of course you should do it _____the right way.Remember, caring parents and families are the best support you can have. Anyway, wish you grow up _________(healthy) and happily!Unit 21.Mike’s father was angry with him because he _________ others’ things.2.I don’t think________ these flowers in the kitchen is a good idea.3.The teacher warned us not ____________ football in front of the classroom.4.The young children got into the cinema by a ___________.5.Sam _________ the news to the whole school and soon everyone knew it.B.根据短文内容和所给中文提示，在空白处填入单词。

九年级(下)历史1-3单元习题

7．一战后，在远东和太平洋地区争夺最激烈的国家是（）．一战后，在远东和太平洋地区争夺最激烈的国家是（ A．英美 B．美日 C．英日 D．日俄．．．． 8．下列对《九国公约》的表述不正确的是（）．下列对《九国公约》的表述不正确的是（ A．中国参与签订 B．体现了美国对华政策的精神．． C．抵制了日本在华势力的扩张． D．中国领土及主权受到尊重． 9.华盛顿体系确立的帝国主义统治秩序是在（华盛顿体系确立的帝国主义统治秩序是在（华盛顿体系确立的帝国主义统治秩序是在） A．西亚和欧洲 B．远东和太平洋地区．． C．欧洲和远东地区 D ．亚洲非洲欧洲． 10．在华盛顿会议上美国支持中国的主要原因是（）．在华盛顿会议上美国支持中国的主要原因是（ A．借中国遏制苏联 B．中国政府奉行亲英美政策．． C．反对日本独霸中国 D．中国政府代表的外交努力．．
1．下列有关凡尔赛—华盛顿体系说法正确的是（）．下列有关凡尔赛华盛顿体系说法正确的是华盛顿体系说法正确的是（ A．消除了帝国主义战胜国之间的矛盾． B．能长期存在下去 C．确立了战后的国际秩序．． D．缓和了战胜国与战败国之间的矛盾． 2．在一次历史知识竞赛上，主持人说道：“这是一次由战．在一次历史知识竞赛上，主持人说道：胜国参加的国际会议。会上中国代表的正义要求遭到拒绝，胜国参加的国际会议。会上中国代表的正义要求遭到拒绝，消息传到中国，消息传到中国，引发了一场大规模的彻底的反帝反封建的爱国运动。这一会议是（国运动。”这一会议是（） A．巴黎和会 B．华盛顿会议．． C．慕尼黑会议 D．大陆会议．． 3．巴黎和会讨论的中心问题是（）．巴黎和会讨论的中心问题是（ A．如何处置战败的德国 B．解决协约内部的矛盾．． C．限制军备竞赛 D．建立欧洲新秩序．．

九年级化学1--3单元测试卷

第1页，共2页…………○…………外…………○…………装…………○…………订…………○…………线…………○………… …………○…………内…………○…………装…………○…………订…………○…………线…………○…………学校:___________姓名：___________班级：___________考号：___________九年级化学1--3单元测试卷考试总分：100分一、选择题（共 15 小题，每小题 2 分，共 30 分）1.已知：“”、“”和“”表示不同元素的原子．某反应的微观示意图如图，关于乙的构成说法合理的是（）A.只含和B.含有和C.只含D.只含 2.食品包装上常标注含有的营养成分．其中标注的“铁、镁、锌、钙”是指（） A.原子 B.分子 C.元素 D.非金属3.如图所示，粒子结构示意图中，最外层电子没有达到稳定结构的粒子是（） A.B.C.D.4.表示“两个氮原子”的符号是（）A.2NB.N 2C.2N 2D.N +2 5.规范的操作是实验成功的前提．实验操作正确的是（） A.检查装置气密性时，先用手握住试管，再将导管放入水中 B.取少量液体试剂时，滴管伸入试剂瓶内液体中，挤压胶头吸液C.用试管夹夹持试管给液体加热时，需要移动试管，以防受热不均和液体冲出D.实验结束后，剩余的试剂都应放回原试剂瓶6.下列符号中，既能表示一种原子，又可表示一种元素，还能表示一种物质的是（） A.C 60 B.2H C.2H 2 D.He7.实验操作过程中，对于药品的用量有要求，下列药品用量不符合要求的是（） A.没有规定用量时，液体取1−2mLB.加热液体时，液体体积不能超过试管容积的23C.固体用量没有要求时盖满试管底部即可D.量筒量取的液体体积通常应该稍小于或等于所要量取的量程8.如图是元素周期表中某元素的部分信息．下列说法错误的是（） A.该元素原子核内有17个质子 B.该元素的离子结构示意图为C.该元素的相对原子质量为35.45D.该元素为非金属元素9.下列四项基本实验操作中，正确的是（） A. B. C. D.10.关于物理变化和化学变化，下列说法错误的是（）A.化学变化中常伴随能量的变化B.发生化学变化时会同时发生物理变化C.发生物理变化的过程中可能会同时发生化学变化D.发光，放热的变化一定是化学变化11.具有相同质子数和不同中子数的同一元素的不同原子互称同位素．氘和氚是核聚变的原料，已知氘、氚原子核内都只有1个质子，但含不同数目的中子，聚变发生后，氘、氚原子核转变为氦原子核．根据以上叙述，下列说法正确的是（）A.核聚变是化学变化B.氘原子和氚原子是氢的不同元素C.氘原子和氚原子是氢的两种同位素D.氘原子和氚原子的相对原子质量相同12.A 原子与B 原子的质量之比为a ∶b ，而B 原子与碳12原子的质量之比为m ∶n ，则A 原子的相对原子质量为（） A.12am bn B.12bm an C.12bnamD.12an bm 13.在实验室里制取氧气，既可采用分解过氧化氢的方法，也可采用分解氯酸钾的方法．上述两种方法的主要共同点有（）①均使用二氧化锰作催化剂； ②反应都不需要加热； ③发生的都是分解反应； ④两种方法所需仪器相同．14.实验室用高锰酸钾制取氧气时有如下操作步骤：其中操作顺序正确的是（） ①加热， ②检查装置的气密性， ③装药品并固定好装置， ④用排水集气法收集，⑤从水槽中取出导气管， ⑥熄灭酒精灯， ⑦连接仪器．15.对下列实验现象的描述正确的是（）A.硫在空气中燃烧发出微弱的淡蓝色火焰B.铁丝在纯氧中燃烧发出黄色火焰C.红磷在空气中燃烧产生白色的五氧化二磷D.木炭在氧气中燃烧产生白色火焰二、填空题（共7 小题，共 50分）16.（1分）铭铭用托盘天平称量固体药品时，将固体药品放到右盘，50g 砝码放在左盘，当游码移动到2.5g 的位置时，天平平衡，则称量的固体药品的质量是________．17.(3分) 请从氮气、二氧化碳、二氧化硫三种气体中选择合适的，按要求填空： (1)属于空气污染的气体是________． (2)焊接金属常用作保护气的是________．(3)绿色植物光合作用吸收的气体是________． 18.(2分) 回答下列问题：(1)实验台上摆放着试管、蒸发皿、量筒三种仪器，其中不能被加热的仪器是________； (2)请写出熄灭酒精灯火焰的方法：．19.(9分) 根据如图所示列举的初中常见的装置图，回答下列问题：A.①③B.③④C.①②D.②④ A.①⑦③②⑤④⑥ B.⑦②③①④⑤⑥ C.⑤⑦③②①④⑥ D.⑦③①②④⑥⑤第2页，共2页…………○…………外…………○…………装…………○…………订…………○…………线…………○…………※※请※※不※※要※※在※※装※※订※※线※※内※※答※※题※※ …………○…………内…………○…………装…………○…………订…………○…………线…………○…………(1)标号为①的仪器的名称是________，盛放红磷的仪器的名称是________．(2)实验室用高锰酸钾制取并收集较纯净氧气的文字表达式是：，他应选择上述装置中的________和________（填字母）进行组装．(3)实验室用过氧化氢溶液和二氧化锰制氧气，应该选择的发生装置是________（填字母）． (4)用C 装置收集氧气后，验满的方法是________．(5)空气中氧气含量测定的实验装置如图F 所示．该实验现象为：． (6)下列有关此实验的说法正确的是（填字母）________． A.实验中的红磷越多，水位上升越高 B.燃烧匙中的红磷不可以换成硫和木炭C.选用足量红磷进行实验是为了耗尽集气瓶内氧气D.本实验可以证明空气含有N 2、O 2、CO 2和稀有气体．20.(4分) 元素周期表是学习和研究化学的重要工具．请分析表中信息回答有关问题：(1)表中 8号元素的一个原子在化学反应中易得到________个电子； (2)表中最活泼的金属元素形成的离子符号是________； (3)写出12号与17号元素组成的化合物的化学式________；(4)日本福岛核电站核泄漏中具有放射性的原子主要是碘−131，请根据图推断碘在周期表中位于第________周期． 21.(10分) 我们学习了很多概念，对于概念我们要在理解的基础上进行运用．(1)由于________是保持物质化学性质的最小粒子，所以水的化学性质是由________（填写具体的微观粒子，下同）保持的．但是，因为金属汞是由________直接构成的，所以，________保持了汞的化学性质．(2)有的物质是由分子构成的，还有的物质是由原子直接构成的，分子和原子的本质区别是． 22.（12分）填写下表中的空白处：原子种类相对原子质量质子数中子数电子数核电荷数氧原子16 8 钠原子23 11 碳原子6 6 硫原子16 16 23.（9分）按要求写出下列符号或符号表示的意义：（1）①氢元素_______；②2个铜原子_______；③氦元素_______；④地壳中含量第二多的金属元素_______；⑤2个钙原子_______。

人教版九年级数学1-3单元测试

人教版九年级数学1-3单元测试第一单元：有理数的认识与运算1. 用最简形式表示下列各分数，并判断它们是否为有理数：- a) $-1.5$- b) $0.8$- c) $2.75$2. 将下列各分数化成带分数的形式：- a) $3 \frac{3}{4}$- b) $7 \frac{5}{8}$3. 按要求写出下列各数的相反数：- a) $-4$- b) $0.2$- c) $-2 \frac{1}{3}$4. 计算下列各式的值：- a) $2 \times (-5) + 8$- b) $6 - (-2) \times 3$- c) $-2 - 3 \times 2 + 5$第二单元：一次函数与一元一次方程1. 判断下列是方程还是不等式：- a) $5x + 3 = 2$- b) $3x + 2 \leq 8$2. 解下列方程：- a) $2x - 1 = 7$- b) $3x + 5 = -10$3. 判断下列方程是否有解：- a) $3x - 9 = 0$- b) $2x + 3 = 0$4. 根据题意写出下列一元一次方程：- a) 五个数的和是20- b) 一个数加上6等于12第三单元：百分数1. 用百分数表示下列各分数：- a) $\frac{2}{5}$- b) $\frac{3}{4}$2. 将下列各百分数化成分数形式：- a) $60\%$- b) $25\%$3. 计算下列各式的值：- a) $45\%$ of $120$- b) $30\%$ off $200$4. 已知一个数的 $70\%$ 等于140，求这个数是多少。

---以上是人教版九年级数学1-3单元测试的内容，请同学们根据题目要求完成相应的考试题目。

九年级化学1-3单元测试题

九年级化学1-3单元测试题一、选择题（每题2分，共30分）1. 下列变化属于化学变化的是（）A. 冰雪融化B. 酒精挥发C. 蜡烛燃烧D. 矿石粉碎解析：选项A：冰雪融化是水由固态变为液态，只是状态发生改变，没有新物质生成，属于物理变化。

选项B：酒精挥发是酒精由液态变为气态，只是状态变化，没有新物质生成，属于物理变化。

选项C：蜡烛燃烧生成二氧化碳和水，有新物质生成，属于化学变化。

选项D：矿石粉碎只是形状改变，没有新物质生成，属于物理变化。

答案：C2. 下列物质的性质属于化学性质的是（）A. 颜色B. 密度C. 可燃性D. 溶解性解析：化学性质是物质在化学变化中表现出来的性质。

选项A：颜色不需要通过化学变化就能表现出来，属于物理性质。

选项B：密度是物质本身的一种特性，不经过化学变化就能测定，属于物理性质。

选项C：可燃性需要通过燃烧这一化学变化才能表现出来，属于化学性质。

选项D：溶解性是物质溶解于溶剂中的能力，不需要化学变化就能表现出来，属于物理性质。

答案：C3. 空气中含量最多的气体是（）A. 氧气B. 氮气C. 二氧化碳D. 稀有气体解析：空气中各成分的体积分数大约是：氮气78%、氧气21%、稀有气体0.94%、二氧化碳0.03%、其他气体和杂质0.03%。

所以空气中含量最多的气体是氮气。

答案：B4. 下列实验操作正确的是（）A. 用嘴吹灭酒精灯B. 用药匙取用粉末状药品C. 将氯化钠直接放在天平的托盘上称量D. 把实验剩余的药品放回原瓶解析：选项A：不能用嘴吹灭酒精灯，应该用灯帽盖灭，否则可能引起火灾。

选项B：用药匙取用粉末状药品是正确的操作。

选项C：氯化钠不能直接放在天平托盘上称量，应该放在纸上或玻璃器皿中，防止腐蚀托盘。

选项D：实验剩余的药品不能放回原瓶，以免污染试剂。

答案：B5. 下列关于氧气的说法正确的是（）A. 氧气能支持燃烧，可作燃料B. 氧气能跟所有物质发生氧化反应C. 水中的生物能依靠微溶于水中的氧气而生存D. 带火星的木条一定能在含有氧气的集气瓶中复燃解析：选项A：氧气能支持燃烧，但本身不能燃烧，不可作燃料。

九年级物理1—3章测试题(供参考)

九年级物理1—3章测试题一、选择题（每小题2分，共40分）1、下列现象中，说明分子不停地做无规则运动的是（）A．糖块放入水中，水变甜了 B. 洒水车将水喷洒在地面上C．地时，在阳光下看到灰尘在空中飞舞 D．沙粒放入水中，水变浑浊了2、通常把青菜腌成咸菜需要几天时间，而把青菜炒熟，使之具有咸味，仅需几分钟。

造成这种差别的主要原因是（）A．盐分子太小，很容易进入青菜中 B．盐分子间有相互作用的排斥力C．青菜分子间有空隙，易扩散 D．炒菜时温度高，分子运动加快3、压缩固体和液体很困难说明分子间（）A.分子之间存在着斥力B.分子之间存在着引力C.分子不停滴在做无规则的运动D.固体、液体分子之间没有空隙4、物质处于哪种状态决定于( )．A．物质的温度 B．物体内分子无规则运动的剧烈程度C．物质的分子结构 D．物质内部分子作用力的大小5、下列关于物体内能的说法中正确的是（）A．物体运动速度越大，内能越大 B．静止的物体没有动能，但有内能C．内能和温度有关，所以0℃的水没有内能 D．温度高的物体一定比温度低的物体内能大6、关于温度、内能、热量三者的关系，下列说法正确的是（）A．物体吸收热量，温度一定升高 B．物体温度升高，一定是吸收了热量C．物体温度不变，就没有吸热或放热 D．物体温度升高，内能增加7、下列事例中，属于做功改变物体内能的是（）A．在火上点燃火柴头，使火柴头温度升高 B．冬天人们围着火炉烤火身体感觉暖和C．两手互相摩擦，手感觉暖和 D．在阳光照射下，水盆里的水温度升高8、一把勺子的温度升高了（）A．它一定吸收了热量 B．一定和其他物体发生了热传递C．它的热量一定增加 D．它的内能一定增加9．关于温度，热传递和热量，下列说法中正确的是（）A．温度高的物体具有的热量多 B．热量总是从热量多的物体传递到热量少的物体C．热量总是从温度高的物体传递给温度低的物体 D．温度低的物体含有的热量少10、下列说法正确的是( )．A．一杯煤油用去一半，它的比热容减为原来的二分之一B．吸收热量多的物质，比热容一定大C．高温物体放出热量一定多D．质量相同的水和煤油，吸收了相同的热量，煤油升高的温度大于水升高的温度11、关于燃料和热值，以下说法正确的是（）A．燃料热值与燃料的质量无关B．容易燃烧的燃料，热值一定大C．煤的热值大于干木柴的热值，燃烧煤放出的热量比燃烧木柴放出的热量一定多D．为了提高锅炉的效率，一定要用热值高的燃料12、下列事实中，最能说明物质吸收的热量跟物质种类有关的是( )A．体积相同的两杯水温度都升高10℃，它们吸收的热量相同B．质量相等的两块钢温度分别升高5℃和10℃，它们吸收的热量不同C．体积相等的水和煤油温度都升高10℃，它们吸收的热量不相同D．质量相等的水和铜温度都升高10℃，它们吸收的热量不相同13、有关四冲程内燃机的叙述中，不正确的是（）A．工作中只有做功冲程把内能转化为机械能 B．工作开始时要靠外力启动C．工作中压缩冲程是把内能转化为机械能 D．每一个工作循环，燃气只做功一次14、甲、乙两汽车，甲的汽油机效率比乙的汽油机效率高，这表明（）A．甲做功比乙多 B．甲做功比乙快C．甲消耗的汽油比乙少 D．以相同的牵引力行驶相同的路程，甲耗油比乙少15、如图所示的电路中，正确的说法是（）A.三个电阻串联B.三个电阻并联C.三个电阻均未接入电路D.只有一个电阻未接入电路、其余两个电阻串联16、如图所示电路。

浙教版九年级数学下册第一至三章测试卷(word有答案)

浙教版九年级数学下册第一至三章测试卷(word有答案)A ．1B ．2C ．12D 8.某住宅小区的物业管理部门为解决住户停车困难问题，将一条道路开辟为停车场，停车位置如图所示，已知矩形 ABCD 是供一辆机动车停放的车位，其中 AB=5.4m ，BC=2.2m ，∠DCF=40°.则停车位所占道路的宽度 EF 是（结果精确到 0.1m ，参考数据：sin40°≈0.64，cos40°≈0.77，tan40°≈0.84）（B）A.8.6mB.5.2mC.4.8mD.5.6m【解析】由题意知∠DFC=90°，∠DEA=90°，∠DCF=40°.又∵四边形ABCD 是矩形，∴AB=CD=5.4m，BC=AD=2.2m，∠ADC=90°.∴∠DCF=∠ADE=40°.在Rt△DCF 中，DF=CD·sin∠DCF=5.4×sin40°≈5.4×0.64=3.456（m），在Rt△DAE 中，DE=AD·cos∠ADE=2.2×cos40°≈2.2×0.77=1.694（m）.∴EF=DE+DF≈3.456+1.694≈5.2（m）.故选B.9.如图所示为某几何体的三视图，其俯视图为正六边形，则该几何体的体积是（ C ）A．3B．3C．3D．144310.如图所示，AB 为⊙O 的直径，C 为⊙O 上一点，DF 切⊙O 于点E，分别与CA，CB 的延长线交于点D，F，已知AB∥DF，CD=4，CF=3，则AC 等于（D ）A．95B．158C．4825D．9649【解析】∵AB 是⊙O 的直径，∴∠C=90°.∵CD=4，CF=3，∴DF=5.∵AB∥DF，∴△ABC∽△DFC.∴BC∶AC∶AB=CF∶CD∶DF=3∶4∶5. 如答图所示，连结OE.∵DF 是⊙O切线，∴OE⊥DF. 作CN⊥DF，交AB 于点M，交DF 于点N，则MN=OE（平行线间的距离相等）.设AB=5a，则AC=4a，OE=MN=2.5a.∵AC2=AM·AB，∴16a2=5aꞏAM.∴AM=3.2a，BM=AB-AM=1.8a.∵CM2=AMꞏBM=5.76a2，∴CM=2.4a.∴CN=CM+MN=4.9a.∵AB∥DF，∴AC∶CD=CM∶CN=2449.∴AC=2449CD=9649，.故选D.二、填空题（每题4 分，共24 分）11.已知α为锐角，且tanα=1，则α= 45 度.12.如图所示，PA 是⊙O 的切线，切点为A，PA=1，∠APO=30°，则⊙O 的半径为.313.如图所示为一个底面为正六边形的直六棱柱的主视图和俯视图，则其左视图的面积为14.如图所示，在Rt△ABC 中，∠ACB=90°，CD⊥AB，BC=4，AB=6，则cos∠ACD=2.315.在一次数学实验活动中，老师带领学生去测一条南北流向的河的宽度.如图所示，某同学在河东岸点 A 处观测河对岸水边有点 C ，测得 C 在 A 北偏西 31°的方向上，沿河岸向北前行 20m 到达 B 处，测得 C 在B 北偏西 45°的方向上，则这条河的宽度约为 30 m.（参考数据：0031tan 31,sin 3152==）16.如图所示，在平面直角坐标系中，已知以点 P （-3,a ）为圆心的⊙P 与 y 轴相切于点C ．直线 y=-x 被⊙P 截得的线段 AB 长为42，则过点 P 的双曲线的函数表达式为【解析】作 PH ⊥x 轴于点 H ，交直线 y=-x 于点 E ，作 PD ⊥AB 于点 D ，连结 PC ，PA ，如答图所示. ∵⊙P 与 y 轴相切于点 C ，∴PC ⊥y 轴. ∵P （-3，a ），∴PC=3，即⊙P 的半径为 3.∴PA=OH=3.∵PD⊥AB，∴AD=BD=12 AB=1222在 Rt △PAD 中，PD=1∵直线 y=-x 为第二、四象限的角平分线，∴∠HOB=45°. 易得△HOE 和△PDE 都为等腰直角三角形.∴EH=OH=3，PE= 2 2.∴2∴P （-32）.设过点 P 的双曲线的函数表达式为 y=k 把点 P （-32）代入，得 k=－32+3）=－－9.∴过点 P 的双曲线的函数表达式为 329y x =-．三、解答题（共 66 分）17.（6°+6tan30°-2cos30°.【解析】原式1． 18.（8 视图如图所示（单位：cm ）. (1)根据图中的数据画出它的俯视图,并求出俯视图的面积. (2)求这个长方体的体积.【解析】(1)俯视图如答图所示. 俯视图的面积为18×15=270（cm2）.(2)长方体的体积为18×15×12=3240（cm3）.19.（8 分）小梅家的阳台上放置的一个晒衣架的侧面示意图如图所示，A，B 两点立于地面，将晒衣架稳固张开，测得张角∠AOB=62°，立杆OA=OB=140cm.小梅的连衣裙穿在衣架后的总长度为122cm，将这件连衣裙垂直悬挂在晒衣架上是否会拖到地面？请通过计算说明理由.（参考数据：sin59°≈0.86，cos59°≈0.52，tan59°≈1.66）【解析】过点O 作OE⊥AB 于点E.∵OA=OB，∠AOB=62°，∴∠OAB=∠OBA=59°.在Rt△AEO 中，OE=OA·sin∠OAB=140×sin59°≈140×0.86=120.4(cm).∵120.4＜122，∴这件连衣裙垂挂在晒衣架上会拖落到地面.20.（10 分）如图所示，以菱形ABCD 的顶点C 为圆心画⊙C，⊙C 与AB 相切于点G，与BC，CD 分别相交于点E，F.（1）求证：AD与⊙C 相切.（2）如果∠A=135°，AB= 2现用扇形CEF做成圆锥的侧面，求圆锥底面圆的半径.【解析】（1）如答图所示，连结CG，AC，过点C 作CH⊥AD，垂足为H.∵AB 与⊙C 相切，∴CG⊥AB.∵四边形ABCD为菱形，∴AC 平分∠BAD.∴CG=CH.∴CH 为⊙C 的半径.∴AD 与⊙C 相切.（2）∵∠A=135°，∴∠B=45°.在Rt△中，∵∠B=45°，∴CG=1即R=1.设圆锥底面圆的半径为r，，则2πr=135180∴r.=38∴圆锥底面圆的半径为3821.（10 分）如图1 所示的旅行箱的箱盖和箱底两部分的厚度相同，图2 中四边形ABCD 形如矩形的旅行箱一侧的示意图，F 为AD 的中点，EF∥CD，现将放置在地面上的箱子打开，使箱盖的一端靠在墙上点D 处，O 为墙角，如图3 所示为箱子打开后的示意图，若箱子厚度AD=30cm，宽度AB=50cm.（1）在图2 中，EC= 15 cm.当点D与点O 重合时，AO 的长为多少厘米？（2）若∠CDO=60°，求AO 的长（结果取整数）.第 11 页【解析】（1）∵EF ∥AB ∥CD ，DF=AF ，∴EC=EB= 12 BC=12AD=15(cm). 当点 D 与点 O 重合时，∵AB=BO=50cm ， ∴AO=50+50=100（cm ）. （2）如答图所示，过点 C 作 OA 的平行线，分别交 BE 和 OD 于点 H ，G. ∵EB ⊥OA ，OD ⊥OA ，∴HG=HC+CG=OB. ∵∠ECD=90°，∠CDO=60°，∴∠DCG=30°，∠ECH=60°. ∵CD=50cm ，EC=15cm ，∴HC=EC ·cos60°=7.5cm ，CG=CD ·sin60°343.3(cm).∴AO=AB+OB=AB+HC+CG ≈101(cm). 22.（12 分）如图所示，已知以 Rt △ABC 的斜边 AB 为直径作△ABC 的外接圆⊙O ，∠ABC 的平分线 BE 交 AC 于点 D ，交⊙O 于点 E ，过点 E 作 EF ∥AC 交 BA 的延长线于点 F. （1）求证：EF 是⊙O 的切线.（2）若 EF=8，tan ∠AEF=12，求 CD 的长. 23.（12 分）如图所示，半⊙O 的直径 AB=4，以长为 2 的弦 PQ 为直径，向点 O 方向作半⊙M ，其中点 P 在弧AQ 上且不与点 A 重合，但点 Q 可与点 B 重合. 发现：弧AP 的长与弧QB 的长之和为定值 l ，求 l. 思考：点 M 与 AB 的最大距离为3，此时点 P ，A 间的距离为 2 .点 M 与 AB 的最小距离为 32半⊙M 的弧与 AB 所围成的封闭图形的面积为36π- 探究：当半⊙M 与 AB 相切时，求弧AP 的长. （结果保留π，cos35°=63cos55°=33）第 12 页。

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科学九年级下综合测试班级：姓名：学号：得分：一、选择题(每小题只有一个正确答案，每小题2分，共60分)1．在池塘生态系统中，属于种群的是( )A．所有的藻类 B．所有的鲫鱼 C．所有的浮游动物 D．所有的微生物2．右图为某生态系统中几种生物之间的食物关系。

从生态系统组成成分的角度来看，其中属于生产者的是( )A.小麦B.鼠C.鼬D.鹰3．地球上最大的生态系统是（）A．荒漠生态系统B．草原生态系统C．生物圈 D．海洋生态系统4、下列各项中正确的食物链是（）A、草→羊→狼B、阳光→草→昆虫→蛙C、兔→狐→细菌D、草→兔→狼→细菌5、俗话说“大树底下好乘凉”“千里之堤，溃于蚁穴”。

这都体现了（）A、生物能影响环境B、生物能适应一定的环境C、环境能影响生物的生存D、生物与环境可以相互影响6．2008年7月初，青岛奥帆赛海面被大量浒苔(一种绿藻)覆盖，形似草坪。

经多方努力，浒苔被及时处理，保证了奥帆赛的正常进行。

下列说法不正确的是( )A.浒苔属于生态系统的生产者B.浒苔过度繁殖可能导致鱼类死亡C.这一事件警示我们应该积极治污减排，坚持可持续发展D.浒苔过度繁殖对当地水域的生物多样性有促进作用7、一个生态系统中的四种生物能构成一条食物链，在某—时间分别测得这四种生物(甲、乙、丙、丁)所含有机物的总量，如右图所示。

其中属于生产者的是（）A．甲B．乙C．丙D．丁8.“落花不是无情物，化作春泥更护花”的诗句反映了（）A 生态系统中能量流动的单向性和不可逆性B 生态系统中的物质循环C 生物与环境相互依存、相互制约的关系D 生态系统中生物与食物链间的关系9．生态系统中，完成物质循环的两个关键性成分是（）A．生产者和消费者 B．生产者和分解者C．生产者和非生物成分 D．消费者和非生物成分10.有毒物质会通过食物链不断积累。

你认为正确表示某生态系统中生物体内积累的有毒物质数量多少的图示是()11.水中生物的分布通常是数量随着水深度的增加而减少，这种影响因素主要是()A.深水中食肉性鱼类增多B.深水中更咸C.深水中阳光不足D.深水中温度更高12.在一片潮湿阴暗的草丛中，有一堆长满苔藓的腐木，其中聚集着蚯蚓、蜘蛛、老鼠、蚂蚁等动物，这片草丛中的生物构成一个( )A、生态系统B、生态环境C、生物种群D、生物群落13．沙漠中的仙人掌的叶变态成刺，是因为那儿缺少( )A．动物 B．阳光C．温度 D．水14.下列几种生态系统中,自动调节能力最大的是( )A. 温带草原B. 温带落叶林C. 北方针叶林D. 热带雨林15.当美洲的灰松鼠引入英国后,当地原有的普通松鼠几乎全部被灰松鼠所替代,这种现象在生物学上称为（）A. 种内斗争B. 种间竞争C. 捕食D. 寄生16、在草→鹿→狼这条食物链中，狼被大量捕杀以后，图中哪个曲线有可能代表鹿的个体数量变化（）17、原始生命物质中最关键的是（）A.淀粉和脂肪B.蛋白质和核酸C.淀粉和核酸D.脂肪和蛋白质18、下列属于生物进化的是（）A. 蛋生鸡B. 沧海桑田C. 蝌蚪变青蛙D. 古猿变成人19、仙人掌的叶变成刺是对干旱环境的适应，用达尔文的观点解释是因为（）A.生存斗争B.适者生存C.遗传变异D.自然选择20、海豚与鲨鱼是不同纲的动物，但它们的外型却很相像，是因为（）A.有共同祖先B.进化方向相同C.相同环境自然选择的结果D.偶然巧合21、生物进化的内在因素是（）A.产生了有利变异B.产生了不利变异C.产生了可遗传变异D.产生了不遗传变异22、我国婚姻法规定“禁止近亲结婚”的遗传学依据是（）A.近亲结婚一定会使后代患遗传病B.不是近亲结婚就不会会使后代患遗传病C.近亲结婚违反社会伦理道德D.近亲结婚会使后代患遗传病的机会增大23、人类生存离不开氧气O 2，根据地球演化理论，大气中的氧气来自于（）A.火山喷发B.闪电电解C.植物光合作用D.动物呼吸24、随着对环境保护的重视，对农业害虫可采取综合防治的措施。

为除去有害于农作物的某种害虫I 而引入捕食蜘蛛后，对这两个种群数量变化进行调查，得出如图所示的结果。

下列关于对此过程的推理中正确的是（）(A) 害虫I 没有危害农作物(B) A 期间，如果在农田中喷洒对害虫I 的农药，则蜘蛛的数量将增加得更快(C) B 期间蜘蛛数量较快减少的原因是该种蜘蛛的食物不足(D) 在C 期间两个种群的数量基本保持不变，这是因为两者之间已不存在食物关系25．2011年1月3日四名安徽乘客在上海勇斗扒手被表彰见义勇为，其中一名叫余永峰的腋下被刺伤，造成大失血，已知余永峰的血型为O 型，下列说法正确的是（）A ．他的红细胞有A 、B 凝集原，输血可以输A 型血或B 型血B ．他的红细胞有A 凝集原，输血可以输A 型血C ．他的红细胞有B 凝集原，输血可以输B 型血。

D 。

他的红细胞没有凝集原，输血只能输O 型血26．温家宝总理在介绍2010年主要工作时指出，要毫不松懈地抓好“三农”（农村、农民、农业）工作。

下列有关“三农”问题说法不正确．．．的是（） A ．农作物秸秆可用于生产可降解塑料，也可投入沼气池发酵，还可作为食用菌的培养基，这实现了农业生态系统的物质再循环和能量多级利用时间时间时间时间 AB CB．人工选择能培育出农产品新品种，与自然选择相同的是，两者选择的基础都在于生物的遗传和变异是普遍存在的C．农田中长期使用某种农药，效果会越来越差，从达尔文的观点来看，这是农药对害虫逐代选择的结果D．园艺观赏植物苏铁（俗称铁树）属于被子植物，但因为“铁树开花”很难，所以农业上常采用营养繁殖27．下列有关人体生理和疾病的说法，正确的是( )A．某人做尿常规检查时，发现尿液中有血细胞和蛋白质，其病变部位最可能是肾小管B．《水浒》中描写的武大郎发育迟缓、身材异常矮小，但智力正常，由此可推测：他幼年时甲状腺激素分泌不足C．有的同学沉迷于电脑上网，长时间不注意用眼卫生，易造成眼球中的晶状体曲度过大，形成近视D．输血时如果血型不合，输入的血液就相当于抗体，会引起人体免疫反应使红细胞凝集，危及生命28．将细菌放在培养基上培养，它会繁殖并形成菌落。

某生物兴趣小组想检测两种抗生素A和B的杀菌作用，下列实验方案最合适的是（）29．下列不属于人体免疫功能的是（）A．及时清除体内衰老、死亡或损伤的细胞 B．细胞分裂、形成新的组织C．抗体使病原菌凝集、中和病原体产生的毒素 D．识别、清除体内异常细胞，防止肿瘤形成30．右图是生物圈中碳循环的示意图，下列分析不符合图中表示的信息的是（）A．图中③表示的生理过程是呼吸作用B．图中甲代表的生物是腐生细菌和真菌等C．图中乙丙丁三者组成的食物链是：乙一→丙一→丁D．能量沿着食物链流动，在丁这一级生物体内积累最多二、简答题(每空2分，共64分)1．一粒种子改变整个世界！袁隆平为世界粮食安全做出了杰出的贡献，增产的粮食每年为世界解决了7000万人的吃饭问题，他被称为中国“杂交水稻之父”。

(1)利用野生稻“野败” 培育成“超级杂交水稻”，说明生物具有； A、应激性 B、适应性 C、遗传性 D、变异性(2)“超级杂交水稻”优良性状由细胞核里的决定的。

（3）水稻的收成高低除了与水稻的品种有关外，还与田间管理密切相关，“稻花乡里说丰年，听起蛙声一片”这句古诗词就说明青蛙所起的重要作用，然而现在有些不法分子为谋取私利，把大量的青蛙摆上了宾馆的餐桌，导致田间青蛙数量大量减少，请写出与上述有关的一条食物链__________________（4）由于害虫的大肆泛滥，为此农民朋友不得不购买大量的农药来杀灭害虫，但一般的农药又很难杀死还虫，这是因为____________；于是人们又不得不研制与购买高效强力的杀虫剂，这又对人们的身心健康造成严重的危害。

2．今年世界环境日的中国主题是“减少污染——行动起来”。

工业和生活污水是我市黄渤海域近海污染的重要来源，污水处理是水域环境保护的重要措施。

右图所示我市污水处理厂将污水引入曝气池中，利用“活性淤泥”(由多种微生物聚合而成的絮状团块，主要是细菌)净化污水的方法。

试分析回答问题：(1)从生态系统成分的角度来看，细菌属于。

(2)污水引入曝气池后，需要向曝气池中持续不断地通人空气，其作用是促使细菌进行呼吸，使有机物能彻底氧化分解，达到净化目的。

（选填“有氧”、“无氧”）(3)曝气池中需氧型微生物生活所需要的氧气，一部分来自空气，另一部分来自单细胞藻类的作用。

3.(1) 下面图解显示的是人工培育植物的两种方式。

①过程A 的生殖类型属于生殖。

(填“有性”或“无性”)②从遗传角度看，有利于保持生物多样性的是 (填“过程A”或“过程B”)(2) 细菌是极其微小的，这使它们能够非常容易地进入人体。

①用显微镜观察细菌时，视野较亮，可采取的措施是。

A. 缩小光圈B. 更换切片C. 使用凹面镜D. 换用高倍目境②假如细菌进入体内，特殊的血细胞会自动地产生特殊反应，产生抗体。

上图所示三种血细胞，哪种产生抗体？。

4．下面四幅漫画寓意的是人体免疫的三道防线，请回答下列问题：（用图中相应字母表示）A.皮肤的保护作用B.溶菌酶的作用C.抵抗抗原的侵入D.吞噬细胞的作用(1)图中属于第一道防线的是 ,图中属于第三道防线的是。

(2)图中属于特异性免疫的有。

5、如图所示是南极海洋生态系统中部分生物构成的食物网图解。

据图回答下列问题：（1）该生态系统中所有的须鲸称为一个（2）从生态系统的成分来看，海藻属于（3）请写出该食物网中最短的一条食物链6．如图所示为生态系统结构示意图，请据图回答下列问题：(1)图中①、②、③、④、⑤分别代表CO2和O2，那么其中表示CO2的是。

(2)绿色植物、动物和微生物所需的能量，最终来源于。

(3)降低自然界CO2含量的途径有多种，请答出两点。

，。

(4)从有利于环境保护的角度看，人类应更多地利用和使用A、无铅汽油B．太阳能C．煤D．沼气7、某生态系统中仅有狼和鹿两种动物，狼以鹿为食，鹿要逃避狼的捕食。

请回答：（1）狼群和鹿群中都有变异个体，如有的跑得块，有的跑得慢，这说明生物有_________的特性，它为生物进化提供了__________________。

（2）随着时间的延长，狼和鹿的数量都会减少，因为只有跑得块、凶猛的狼才能捕食到鹿而生存下去，否则就被淘汰，这样鹿对狼起了_______________作用；同样因为只有跑得块、灵活的鹿才能逃过狼的捕食而生存，否则就被淘汰，这样狼对鹿起了______________作用。

由此可知，狼和鹿之间进行着__________________，这种作用决定生物进化的__________。

8.随着农药产量和品种逐年增加，害虫抗药性也不断增强，对农作物危害仍然很严重。