[]江西省抚州市崇仁县第二中学2016-2017学年七年级下学期第二次月考数学试题

适用年级:初一
试卷号:202173

试卷类型:月考
试卷考试时间:2017/6/10

1.单选题(共3题)

1.
下列各式中,能运用平方差公式进行计算的是(  )
A.(2a+3b)(2b﹣3a)B.(2a2+b2)(2a2+b2
C.(a+b)(﹣a﹣b)D.(-a+0.5)(-a﹣0.5)
2.
如图,下列条件中,一定能判断AB∥CD的是( )
A.∠2=∠3B.∠1=∠2C.∠4=∠5D.∠3=∠4
3.
已知a,b,c是△ABC的三条边长,且a>b>c,若b=8,c=3,则a可能是(  )
A.9B.8C.7D.6

2.选择题(共2题)

4.

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

5.

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

3.填空题(共6题)

6.
红细胞的平均直径为,将0.0000077用科学记数法表示为__________.
7.
某商店进了一批货,每件进价为4元,售价为每件6元,如果售出x件,售出x件的总利润为y元,则y与x的函数关系式为__.
8.
△ABC中AD平分∠ABC,AE⊥BC,∠B =500,∠C=700 ,∠DAE=_______-0(图1)
(图2)若E是AD上的一点,EF⊥BC于F,其它条件不变,∠DEF=____________0
(图3)若E是AD延长线上的一点,EF⊥BC于F,其它条件不变,∠DEF=_____________0
9.
如图,△ABC中,∠ABC和∠ACB的平分线交于点O,若∠BOC="120°," 则∠A=______°
10.
如图,已知∠ABC=∠DCB,现要证明ΔABC≌ΔDCB,则还要补加一个条件________(只填一个答案)
11.
如图,把一张长方形纸条ABCD沿EF折叠,若∠1=65°,则∠EGF应为__

4.解答题(共8题)

12.
已知a、b 是等腰三角形三角形的两条边,满足 |a-3| +(b-5)2=0,求三角形的周长。
13.
图为小强在早晨8时从城市出发到郊外所走的路程与时间的变化图。根据图回答问题。

(1)图象表示了那两个变量的关系?哪个是自变量?哪个是因变量?
(2)9时,10时30分,12时小强所走的路程分别是多少?
(3)小强休息了多长时间?
(4)求小强从休息后直至到达目的地这段时间的平均速度。
14.
如图,AB∥EF,∠1=60°,∠2=120°,试说明CD∥EF.
15.
△ABC中,AC=BC,∠C=900,AD平分∠BAC,DE⊥AB于E,且AB=20cm,求△BDE的周长.
16.
已知:AB =" AE,AC" = AD,∠BAC=∠EAD, 求证:EC = BD。
17.
如图,已知△ABC和△ECD都是等边三角形, B、C、D在一条直线上。
求证:(1)BE=AD;
(2)CF=CH;
(3)△FCH是等边三角形;
(4)FH∥BD;
(5)求∠EMD的度数。;
18.
已知如图,要测量水池的宽AB,可过点A作直线AC⊥AB,再由点C观测,在BA延长线上找一点B′,使∠ACB′=∠ACB,这时只要量出AB′的长,就知道AB的长,对吗?为什么?
19.
完成下面的证明过程
已知:如图,AB∥CD,AE⊥BD于E,CF⊥BD于F,BF=DE.求证:△ABE≌△CDF.

证明:∵AB∥CD,∴∠1=  .(两直线平行,内错角相等 )
∵AE⊥BD,CF⊥BD,
∴∠AEB=  =90°.
∵BF=DE
∴BF-EF=DE-   
∴BE=  
在△ABE和△CDF中,

∴△ABE≌△CDF   
试卷分析
  • 【1】题量占比

    单选题:(3道)

    选择题:(2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:1

    5星难题:0

    6星难题:11

    7星难题:0

    8星难题:4

    9星难题:1