八年级数学测试.doc

志力学校八年级数学第二十章单元测试题（一元二次方程）姓名_ 得分_一、填空（每题1.5分，计15分）1、已知两个数的差等于4，积等于45，则这两个数为 和 。2、当 时，方程不是一元二次方程，当 时，上述方程是一元二次方程。3、用配方法解方程，则，所以。4、如果是一个完全平方公式，则 。5、当 时，一元二次方程的求根公式为 。6、如果是方程的两个根，那么= ，= 。7、若方程有两个相等的实数根，则= ，两个根分别为 。8、若方程的一个根为1，则= ，另一个根为 。9、以3和7为根且二次项系数为1的一元二次方程是 。10、关于的一元二次方程有一个根为零，那的值等于 。二、选择（每题2分，计18分）1、将方程左边配成完全平方式，得到的方程是（ ）A、 B、 C、 D、2下列方程中， 有两个不相等的实数根的方程个数为（ ）A、1个 B、2个 C、3个 D、4个3、某单位为节省经费，在两个内将开支从每月2500元降到1600元，若平均每月降低的百分率为x，则下列方程中符合题意的是（ ）A、 B、C、 D、4、方程的解为( )_A、-1，2 B、1，-2 C、0， D、0，35、方程的解的情况是（ ）A、有两个不相等的实数根 B、没有实数根C、有两个相等的实数根 D、有一个实数根6、如果一元二次方程的两个根是互为相反数，那么有（ ）A、=0 B、=1 C、=1 D、以上结论都不对7、不解方程，的两个根的符号为（ ）A、同号 B、异号 C、两根都为正 D、不能确定 8、已知一元二次方程，若方程有解，则必须（ ）A、 B、 C、 D、9、若（ ）A、 B、 C、 D、三、解下列方程（12分）1、（直接开平方法） 2、（因式分解法）3、（公式法） 4、（配方法）四、解分式方程（8分）1、 2、 五、解答题（15分）1、 已知是方程的一个根，求方程的另一个根及c的值2、 设是方程的两个根，利用根与系数关系，求下列各式的值（1） （2）3、当为何值时，一元二次方程有两个不相等的实数根?六、解应用题（32分）1.（7分）某校办工厂生产某种产品，今年产量为200件，计划通过改革技术，使今后两年的产量都比前一年增长一个相同的百分数，这样三年的总产量达到1400件，求这个百分数2.（6分）某车间要加工170个零件，在加完90个以后改进了操作方法，每天多加工10个，一共用5天完成了任务，求改进操作方法后，每天加工零件个数3.（5分）已知等腰三角形的底边长为8，腰长是方程9x20=0的一个根，求这个三角形的面积4.（6分）已知方程有两个实数根，且这两个实数根的平方和比两根的积大21，求的值。5.（8分）将进货单价40元的商品按50元出售，能卖出500个，已知这种商品每涨价1元，就会少销售10个。为了赚得8000元的利润，售价应定为多少？这时应进货多少个。志力学校八年级数学第18章单元测试题 班级 学号 姓名_ uuuuuuuuuuuuuuu装uuuuuuuuuuuuuuu订uuuuuuuuuuuuu线uuuuuuuuuuuuuuu（勾股定理）Name Scores 一、选择题1、如图，字母B所代表的正方形的面积是 ( ) A.、12 B、13 C、144 D、194 2、观察下列几组数据:(1) 8, 15, 17; (2) 7, 12, 15; (3)12, 15, 20; (4) 7, 24, 25. 其中能作为直角三角形的三边长的有( )组 A. 1 B. 2 C. 3 D. 43、如果把直角三角形的两条直角边同时扩大到原来的2倍，那么斜边扩大到原来的( )A1倍 B2倍 C3倍 D4倍4、两只小鼹鼠在地下打洞，一只朝前方挖，每分钟挖8cm，另一只朝左挖，每分钟挖6cm，10分钟之后两只小鼹鼠相距（ ）A50cm B100cm C140cm D80cm5、直角三角形的两直角边分别为5cm，12cm，其中斜边上的高为（）A6cm B85cm Ccm Dcm6、如图，一个圆桶儿，底面直径为16cm，高为18cm，则一只小虫底部点A爬到上底B处，则小虫所爬的最短路径长是（取3）（）A.20cm B.30cm C.40cm D.50cm16cm18cmBA7、如图，已知矩形ABCD沿着直线BD折叠，使点C落在C/处，BC/交AD于E， AD8，AB4，则DE的长为（ ） A 3 B 4 C 5 D 68、如果梯子的底端离建筑物5米,13米长的梯子可以达到该建筑物的高度是 ( ) A. 12米 B. 13米 C. 14米 D. 15米二、填空题9、在RtABC中，C=90，若a=5，b=12，则c=_10、如图，所有的四边形都是正方形，所有的三角形都是直角三角形，其中最大的正方形的边和长为7cm,则正方形A，B，C，D的面积之和为_cm2ABCD7cm11、如下图中直角三角形中未知的长度:b=_,c=_. 12、已知直角三角形的三边长为6、8、x，则以x为边的正方形的面积为_。三、解答题13、如图，从电线杆离地面6 m处向地面拉一条长10 m的缆绳，这条缆绳在地面的固定点距离电线杆底部有多远？14、如图，台风过后，一希望小学的旗杆在离地某处断裂，旗杆顶部落在离旗杆底部8m处，已知旗杆原长16m，你能求出旗杆在离底部什么位置断裂的吗？ 8mABCD15、已知，如图，四边形ABCD中，AB=3cm，AD=4cm，BC=13cm，CD=12cm，且A=90，求四边形ABCD的面积。16、一艘轮船以16海里/时的速度离开港口向东方向航行，另一艘轮船在同时同地以12海里/时的速度向南方向航行，他们立刻港口一个半小时后相距多远？17、如图，在边长为c的正方形中，有四个斜边为c的全等直角三角形，已知其直角边长为a，b.利用这个图试说明勾股定理?C18、在ABC中，三条边的长分别为a，b，c，an21，b2n，cn2+1(n1，且n为整数)，这个三角形是直角三角形吗？志力学校七年级下英语期终测试卷（2009.08.01）Name Marks 、单项选择，选择最佳答案。（共20分）1. Nick and Sally, are reading English books? Yes, are. A. they; you B. you; we C. we; we D. you; they2. there milk in the fridge? No, but we have apple juice. A. Is; any; some B. Are; any; some C. Is; some; any D. Are; some; any3. I often do exercise the morning, but Sunday morning I listen to the radio. A. in; on B. on; in C. in; at D. on; at4. do you usually go to school, Simon? By bike. A. What B. When C. Why D. How5. your uncle work every day? Sorry. I dont know. A. Do; go B. Do; go to C. Does; go D. Does; go to 6. is your birthday, Millie? Its on 18th March. A. When B. What C. How D. Why7. Is this ball, Joe? No, its not . A. your; my B. your; mine C. yours; my D. yours; mine8. Does Daniel often play you? No. He often looks things on the Internet. A. for; on B. with; out C. with; for D. for; out 9. When the light is red, you cross the road. You wait for the green light. A. can; must B. can; must not C. cant; must D. cant; must not10. Do you have Computer lesson today? No. But we have Art lesson. A. a; a B. a; an C. an; a D. an; an、同义句转换，每空一词。（每空1分，共10分）1.The little girl does well in swimming. The little girl is swimming.2. Whats your little brothers age? _ _ is your little brother? 3. Does Daniel go home on foot after school? Does Daniel after school?4. Mr. Wang is our English teacher. Mr. Wang English.5. Which festival do you like best? Which is festival?、完形填空。（共20分） My dayTimetable6:00起床5：00回家6：20读英语6：20吃晚饭6：50吃早饭7：00做家庭作业7：10步行上学 8：30看电视12：10吃中饭9：30睡觉My name is Wang Jing. Im a Chinese girl. I study at No. 3 Middle School of Dongtai. From Monday to Friday I 1 up at six in the morning. I read English 2 six twenty. I often 3 breakfast at six fifty. After breakfast I 4 to 5 at seven ten. We have four classes in the morning. At twelve ten I have 6 with my mum and dad. In the afternoon we have two classes. We go home at five. 7 is at six twenty. I 8 my homework at about seven. After that I watch TV. Then I 9 to 10 at about nine thirty.（）1. A. gets B. get C. to get D. getting（）2. A. in B. at C. onD. with （）3. A. haveB. havesC. has D. having（）4. A. driveB. comeC. goD. walk（）5. A. homeB. schoolC. the schoolD. the home（）6. A. breakfastB. lunchC. supperD. dinner（）7. A. BreakfastB. LunchC. Supper D. Bread（）8. A. writeB. writesC. doD. does（）9. A. comeB. comesC. goesD. go（）10. A. bedB. the bedC. a bedD. an bed、阅读理解。（共30分）A你想知道中西方的节日有何不同吗？快来看看这两封电子邮件吧！To：J From: L Subject: Autumn! Date:29/09/ 8:00 p.m.Hello, Jenny!Today is the Mid-Autumn Festival. We will watch the moon tonight, and look for Change and Wu Gang. We usually eat mooncakes. They are round, like the moon.National Day is also in autumn, on October 1st. My mother and father are usually free for seven days! We will do many things together. I like going to the National Day celebration.But the best thing in autumn is my birthday. Its in October. I will be fifteen years old. Goodbye.Yours,Li MingTo：L From: JSubject: _! Date:29/09/ 9:12 p.m.Dear Li Ming,Thank you for your e-mail! I love autumn too. In Canada, we have an autumn holiday called Thanksgiving Day. Family members always celebrate it together. I will go to my grandmother and grandfathers house. My uncles, aunts and their children will be there too.Canadian Thanksgiving Day is in early October. In the USA, they celebrate Thanksgiving Day in late November.Have a good time on your birthday, Li Ming! On my birthday, I have a cake with candles. Everyone sings the song “Happy birthday”. Then I blow out the candles! Will you have a cake for your birthday?Your friend,Jenny（ ）1. When is Li Mings birthday? _. A. On September 29th B. In September C. Before September 29th D. After September 29th（ ）2. Americans celebrate Thanksgiving Day _. A. in early October B. in early November C. in late October D. in late November（ ）3.What do Canadians usually do on Thanksgiving Day? They usually _. A. eat cakes B. stay together C. watch the moon D. sing a song（ ）4. The subject(主题)of Jennys e-mail is “_”. A. Your birthday B. My birthday C. Thanksgiving Day D. National Day（ ）5.What must Li Ming and Jenny use when they write to each other?_. A. Pens B. Paper C. Computers D. TelephonesB 南京是江苏的省会，也是六朝古都之一，是个人杰地灵的好地方。现在就让我们一起领略它的优美的风光。 Xuanwu Lake (玄武湖) Price: Adults ￥30 Children ￥20 Open: 6:00 a.m.7:00 p.m. every day Hongshan Forest Zoo （红山森林动物园）Price: ￥25 Open: 8:00 a.m.4:30 p.m. every day Zijin Mountain Observatory (紫金山天文台)Price: Adults ￥15 Children ￥10Open: 9:00 a.m.5:00 p.m. every day （ ）6. If you want to know some information about outer space(外空间), you can go to _. A. the Xuan wu Lake B. the Zijin Mountain Observatory C. the Hongshan Forest Zoo. D. A and B （ ）7. If your parents and you go to the Xuanwu Lake, you should spend _ yuan on tickets（票）. A. 50 B. 60 C. 70 D. 80 （ ）8. You can go to the Zijing Mountain Observatory at _. A. 5.00 a.m. B. 6.00 p.m. C. 1.00 p.m. D. 7.30 a.m. （ ）9. Jack wants to see the panda（熊猫）, he can go to _. A. the Hongshan Forest Zoo B. the Xuanwu Lake C. the Zijing Mountain Observatory D. A, B and C （ ）10. Its fine today. Jack and his friends want to go boating (划船). You can go to _ to look for them. A. the Zijin Mountain Observatory B. the Xuanwu Lake C. the Hongshan Forest Zoo D. A and C 、书面表达。（共20分）假如你叫Daniel,你的网友Amy想知道你的日常生活，现在请你根据以下提示，给你的网友发个邮件，告诉她你的情况。1在北京阳光中学上学。 26：30起床7:30上学。38：3011：30上课。4下午4：30后与同学打篮球，然后回家。5每晚花一个小时做作业。作业太多，很讨厌。69：30左右睡觉。注意：信的开头和结尾已经帮你写好，你只需要接着写。字数60左右。Dear e-friendThank you for writing to me. I want to tell you something about my life._ Yours,Daniel志力学校八年级下英语期终测试卷（2009.08.01）Name Marks 、单项填空（共20小题，每题1分，计30分）（ ）1. What _ you _ at this time yesterday?A. did; do B. are; doing C. were; doing （ ）2.She didnt go home. I didnt go home, _.A. too B. also C. either （ ）3.He asked me _ a report card.A. write B. writing C. to write （ ）4.The teacher said I could do better _ English.A. in B. at C. for （ ）5.Thank you for _ me with my homework.A. help B. helps C. helping （ ）6. _ is easy for a child to wake up and know where they are.A. It B. That C. This （ ）7.Im sure he will _ pass the exam. A. can B. is able to C. be able to（ ）8. _eye exercises _ good _ your eyes.A. Doing; are; for B. Do; is; for C. Doing; is; for（ ）9.The river is very dirty. _ people want to swim in it.A. A few B. Little C. Few （ ）10.Ive been _for five hours.A. skate B. skating C. skated （ ）11.There are many trees on _ side of the street.A. both B. every C. each （ ）12.The man _ glasses is my physics teacher.A. with B. has C. wears（ ）13.There is little milk in the bottle, _?A. is it B. is there C. isnt there（ ）14.How did you make him_?A. stop talking B. to stop talking C. stops talking（ ）15.Can you tell us _?A. where does he live B. where he livesC. where he does live（ ）16. How do you usually come to school? _ my fathers car.A. By B. In C. With（ ）17.The teacher told the children that the earth _ around the sun.A. moves B. moved C. was moving（ ）18.- Which do you prefer, oranges or apples? -_. I d like bananas.A. Yes, both B. Neither, thank you C. No, thanks （ ）19.Lin Tao is as _ as Zhang Hua.A. strong B. stronger C. the strongest（ ）20.There are five _ people in the city.A. millions B. million ofC. million、完形填空（共10小题，计25分）A) 从下面的词汇框中选择合适词的正确形式填空(有一个单词是多余的)。 travel, if, visit, Chinese, English, year Dear Joseph, Ive been a flight attendant for six 21 . I love my job! Ive traveled all over the United States. Ive 22 to Europe and Japan and Australia. My hobby is 23 museums. Ive been to museums in 25 cities and five different countries. Im glad I learned 24 at school. I couldnt do this job 25 I didnt speak English. I hope you are still working hard to learn English, too. Your friend, Lana21. _ 22. _ 23. _ 24. _ 25. _B)选择正确的选项填空。Last Saturday evening Li Hongs family went to see her grand-parents. They _26_ dumplings for supper that evening. 27 was meat and vegetables inside the dumplings. Thedumplings were very delicious. But Li Ming, her brother, did not have any because he _28 eating dumplings. He had some noodles with 29 . He liked chicken very much, but he did not like meat at all. After 30 they had some fruit. What a good time they had!（ ）26. A. hadB. bought C.bring D. brought（ ）27. A. It B.This C. That D. There（ ）28. A. dont like B.liked C. enjoyedD. didnt like（ ）29. A. chickenB. meatC. mutton D.tomato（ ）30. A. workB. playC. supper D.dinner. 阅读理解（共10小题，每小题2分，计25分） A) 根据对话内容，判断正误。正确的写“T”，错误的写“F”。Fan Hua is a TV presenter. He is asking Raja what he thinks about family life.F: Well, Raja, would you like to begin? Is family life in Shanghai different that in your country?R: Yes, I think so. I can see some difference.F: Oh, like what?R: Well, the family seems to be smaller here than in my country. For you, the family is only mum, dad and child.F: How about yours?R: Ours have a more extended(扩大的) family.F: Really?R: Yes. In Pakistan, we usually have grandparents, uncles, aunts, brothers or sisters living in a big family.F: I see, and you look after old family members yourselves, dont you?R: Right.F: It is the same as that in Chinas countryside and remote areas(乡村与边远地区). Oh yes, do you like the family life here in China?R: Yes, I enjoy it very much, but I also enjoy ours.（ ）31. Raja is from America.（ ）32. The young people look after the old family members in Rajas country.（ ）33. In the family life in Chinas countryside, we always have mum, dad and child.（ ）34. The family is smaller in China than that in Rajas country.（ ）35. Raja doesnt like family life in China.B) 阅读下面的内容，然后从题中所给A、B、C中选出最佳答案回答问题。A man was sitting in his doctors office. He was telling the doctor about his problem.“I like football, you know, doctor,” he said. “And my wife has never been good to me since I became interested in it. She often hears me shouting in my dreams(梦). Night after night, when I close my eyes, Im out there on the field and running after flying ball. When I wake up, I always feel tired. Im getting thinner and thinner. So, what am I going to do?”The doctor sat back and said, “First, you will have to try your best not to dream about football. When you close your eyes, try to think about something else. Try to think, for example, that you are at a party or someone is going to give you several million dollars”“Are you crazy(疯了), doctor?” the man shouted. “Ill miss my ball then!”（ ）36. The man went to his doctor because _.A. he couldnt get to sleep at night.B. he wanted to get some ideas about his problemC. the doctor asked him to talk about the footballs（ ）37. The man always felt tired when he woke up because _.A. he thought of his football even in his dreamsB. he had a lot of housework to do at nightC. he often got up during the night to play football（ ）38. The doctor told the man _.A. not to dream in his sleepB. to close his eyes after he was lying in bedC. not to think of footb