湖南省张家界市慈利县2018-2019学年八年级上学期期中考试数学试题

适用年级:初二
试卷号:209949

试卷类型:期中
试卷考试时间:2018/11/26

1.单选题(共7题)

1.
分式的值为0,则(  )
A.x=2B.x=﹣2C.x=±2D.x=0
2.
下列等式或不等式成立的是 ( )
A.B.
C.D.
3.
,则分式等于 ( )
A.B.C.1D.
4.
分式的最简公分母为 ( )
A.2xy2B.5xyC.10xy2D.10x2y2
5.
小明用一根长20cm的铁丝做一个周长是20cm的等腰三角形,则腰长x的取值范围是 (    )
A.0<x<10B.0<x<5C.5≤x≤10D.5<x<10
6.
以下列各组线段为边,能组成三角形的是( )
A.1cm,2cm,3cmB.4cm,6cm,8cm,C.5cm,6cm,12cm,D.2cm,3cm,5cm
7.
如图所示,在△ABC中,∠BAC=106°,EFMN分别是ABAC的垂直平分线,EMBC上,则∠EAM等于    (    )
A.58°B.32°
C.36°D.34°

2.选择题(共3题)

8.

短文改错。文中共有10处语言错误,每句中最多有两处。每处错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(﹨)划掉。

修改:在错的词下面画一横线,并在该词下面写出修改后的词。

注意:1). 每处错误及其修改均仅限一词;

2). 只允许修改10处,多者(从第11处起)不计分。

Dear Xiaohua,

    It is four days since mother recieves the operation. She is feeling much more better. The doctors told me the operation was successful, but because her old age she had to stay in hospital for other two weeks. The doctors also say it was quite necessary for him to do so. We expect to get a full report in two and three days. Please tell the good news to the rest of the family as soon as possible. You need't come here. I'm able to look at mother by myself. You can send some flower to her. She will feel very happily.

Yours,

Xiaohua

9.

短文改错。文中共有10处语言错误,每句中最多有两处。每处错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(﹨)划掉。

修改:在错的词下面画一横线,并在该词下面写出修改后的词。

注意:1). 每处错误及其修改均仅限一词;

2). 只允许修改10处,多者(从第11处起)不计分。

Dear Xiaohua,

    It is four days since mother recieves the operation. She is feeling much more better. The doctors told me the operation was successful, but because her old age she had to stay in hospital for other two weeks. The doctors also say it was quite necessary for him to do so. We expect to get a full report in two and three days. Please tell the good news to the rest of the family as soon as possible. You need't come here. I'm able to look at mother by myself. You can send some flower to her. She will feel very happily.

Yours,

Xiaohua

10.甲乙两数的和是45,甲数的小数点向右移动一位后,恰好是乙数的2倍,甲数是{#blank#}1{#/blank#}.

3.填空题(共6题)

11.
化简:=____________________.
12.
红细胞的平均直径为,将0.0000077用科学记数法表示为__________.
13.
已知线段a,b,c,求作△ABC,使BC=a, AC=b, AB=c,下面作法的合理顺序为______ (填序号)
①分别以BC为圆心,cb为半径作弧,两弧交于点A
②作直线BP,在BP上截取BC=a
③连接ABAC,△ABC为所求作的三角形。
14.
如图,在△ABC中,∠B与∠C的角平分线交于点O. 过O点作DEBC,分别交ABAC
A.B.若AB=8,AC=6,则△ADE的周长是______.
15.
若2018m=6,2018n=4,则20182mn_____
16.
已知线段,求作,使,下面作法的合理顺序为______(填序号)
①分别以为圆心,为半径作弧,两弧交于点
②作直线,在上截取
③连接为所求作的三角形.

4.解答题(共8题)

17.
计算:
18.
先化简再从、3、4中选一个你喜欢的数代人求值.
19.
解方程:=1.
20.
列方程或方程组解应用题:
小马自驾私家车从地到地,驾驶原来的燃油汽车所需油费108元,驾驶新购买的纯电动车所需电费27元,已知每行驶1千米,原来的燃油汽车所需的油费比新购买的纯电动汽车所需的电费多元,求新购买的纯电动汽车每行驶1千米所需的电费.
21.
如图,点B,F,C,E在直线l上(F,C之间不能直接测量),点A,D在l异侧,测得AB=DE,AC=DF,BF=EC.

(1)求证:△ABC≌△DEF;
(2)指出图中所有平行的线段,并说明理由.
22.
如图,AD⊥BD,AE平分∠BAC,∠B=30°,∠ACD=70°.求∠AED的度数.
23.
如图,已知正方形ABCD的边长为10厘米,点E在边AB上,且AE=4厘米,如果点P在线段BC上以2厘米/秒的速度由B点向C点运动,同时,点Q在线段CD上由C点向D点运动.设运动时间为t秒.
(1)若点Q的运动速度与点P的运动速度相等,经过2秒后,△BPE与△CQP是否全等?请说明理由;
(2)若点Q的运动速度与点P的运动速度不相等,则当t为何值时,能够使△BPE与△CQP全等;此时点Q的运动速度为多少.
24.
在等边三角形ABC中,点P在△ABC内,点Q在△ABC外,且∠ABP=∠ACQBP=CQ
(1)求证:△ABP≌△CAQ
(2)请判断△APQ是什么形状的三角形?试说明你的结论.
试卷分析
  • 【1】题量占比

    单选题:(7道)

    选择题:(3道)

    填空题:(6道)

    解答题:(8道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:0

    5星难题:0

    6星难题:18

    7星难题:0

    8星难题:1

    9星难题:2