二.填空题 11.分式方程的解是 . [答案]x= -3 12.因式分解 . [答案] 13.一组数据按从小到大的顺序排列为1.2.3..4.5.若这组数据的中位数为3.则这组数据的方差是 . [答案] 14.如图.两圆圆心相同.大圆的弦AB与小圆相切.AB=8.则图中阴影部分的面积是 .(结果保留π) [答案]16π 15. 一列数--.其中.则 . [答案] 16.如图.有一矩形纸片ABCD.AB=8.AD=17.将此矩形纸片折叠.使顶点A落在BC边的A′处.折痕所在直线同时经过边AB.AD.设BA′=x.则x的取值范围是 . [答案] 查看更多

 

题目列表(包括答案和解析)

是 下列(   )方程的接                                                   

(A)   (B)    (C)    (D)      二、填空题

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(附加题)填空:(
1
1
+
2
+
3
…+
2008
+
2009
)0
=
 

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某校对全校200名初三学生进行数学学习情况的测试,并从中随机抽取了40份试卷,下表是这40份试卷中填空题部分(共14小题,每小题做对得3分、做错得0分)的答题情况:
答对题数 9 10 11 12 13 14
份数 1 1 3 8 15 12
根据所给信息,填空:
(1)这40份试卷中答对题数的平均数为
 
,中位数为
 

(2)由此可估计全校200名初三学生填空题部分的平均得分约为
 
分,得分率约为
 
%,全部做对的约为
 
人,答对题数的中位数约是
 

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完形填空 (20分)
The famous British inventor George Stephenson was born in 1781 and died in 1848. one of his _21_ important inventions was the train. He _22_his first train when he was forty-four years old. When he was experimenting with the _23_ engine on the train, he met with _24_ from the government, newspapers and the gentlemen in the country. They said that the noise and the smoke would _25_ cows, horses and sheep, that the _26_ would hurtle(炸飞) or that the hot coals from it would _27_their houses. At that time, _28_ people believed what they said.
George Stephenson _29_ the people that the train could go on small _30_, could pull carriages _31_goods and passengers and there was _32_ to them. It was a very _33_ matter for him to _34_ them believe. However, after _35_, he was able to do it; and the first train that _36_ by Stephenson himself _37_ what he had said.
The first day _38_ the people along the way _39_ the noises of the train _40_ and saw it running quickly to them, they ran back home as quickly as they could and closed their doors tightly, for they thought it a genius. They did not dare to come out until it had passed.
【小题1】
A.veryB.a lotC.mostD.much
【小题2】made   B. bought   C. introduced   D. did
【小题3】
A.electricalB.atomicC.steamD.beautiful
【小题4】
A.successB.troublesC.peopleD.pleasure
【小题5】
A.killB.buyC.interestD.take away
【小题6】
A.smokeB.noiseC.driverD.engine
【小题7】
A.pull downB.blow awayC.set fire toD.pass
【小题8】
A.mostB.fewC.only a fewD.the rich
【小题9】
A.saidB.spokeC.toldD.warned
【小题10】 A.reads    B. rivers    C. steam    D rails
【小题11】
A.short ofB.full ofC.empty ofD.without
【小题12】
A.no great dangerB.dangerousC.a lot of dangerD.few danger
【小题13】
A.easyB.difficultC.pleasantD.light
【小题14】
A.getB.causeC.makeD.force
【小题15】
A.sometimesB.some timeC.a few timesD.sometime
【小题16】
A.was soldB.were drivenC.was pulledD.was driven
【小题17】
A.believedB.seemedC.sensedD.proved
【小题18】
A.ofB.whenC.whileD.for
【小题19】
A.caught sight ofB.listened toC.heardD.thought
【小题20】
A.nearbyB.in the distanceC.on the farD.from the distance

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某校对全校200名初三学生进行数学学习情况的测试,并从中随机抽取了40份试卷,下表是这40份试卷中填空题部分(共14小题,每小题做对得3分、做错得0分)的答题情况:
答对题数 9 10 11 12 13 14
份数 1 1 3 8 15 12
根据所给信息,填空:
(1)这40份试卷中答对题数的平均数为______,中位数为______;
(2)由此可估计全校200名初三学生填空题部分的平均得分约为______分,得分率约为______%,全部做对的约为______人,答对题数的中位数约是______.

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