2015-2016学年内蒙古包头四十三中八年级上学期期中考试数学试卷(带解析)

适用年级:初二
试卷号:213831

试卷类型:期中
试卷考试时间:2017/7/27

1.单选题(共9题)

1.
已知,那么的值为()
A.-lB.1C.D.
2.
下列说法正确的是()
A.0.64的立方根是0.4
B.9的平方根是3
C.0.01的立方是0.000001
D.
3.
下列各数:,0,,—5.121121112……中,无理数的个数是().
A.2个B.3个C.4个D.5个
4.
点P在第四象限内,P到x轴的距离是4,到y轴的距离是3,那么点P的坐标为(    )
A.(-4,3)B.(-3,4)C.(4,-3)D.(3,-4)
5.
点P(﹣2,1)在平面直角坐标系中所在的象限是()
A.第一象限B.第二象限C.第三象限D.第四象限
6.
下列图象中,表示直线的是( )
A.B.C.D.
7.
已知,那么的值为(  )
A.-1B.1C.D.
8.
大的实数是( )
A.-5B.0C.3D.
9.
以下列长度的线段为边不能构成直角三角形的是()
A.3,4,5B.6,8,10C.5,12,13D.6,24,25

2.选择题(共1题)

10.

根据短文内容,用方框中所给词的正确形式填空,使短文完整、正确。

for   you   be   good   careful   do   should   ever   friend   true

      Middle school is going to use a new way to decide who the {#blank#}1{#/blank#} students are in your class. The top students won't only have high marks. They will also be kids who don't dye (染) their hair, smoke or drink. Here {#blank#}2{#/blank#} some of the new rules.

      Tell the {#blank#}3{#/blank#}. Have you ever copied someone else's work on an exam? Don't do it again! If you have played computer games for two hours in your room, don't tell your parents you have{#blank#}4{#/blank#}homework.

      Do more at school. Good students love animals and care for other people. You should learn more about animals and try to protect them. Be {#blank#}5{#/blank#} to other people. Try to think of others, not only yourself.

      Be open to new ideas. Have you {#blank#}6{#/blank#} thought that people could live on the moon? You {#blank#}7{#/blank#} welcome new ideas, because they make life better for everyone.

      Protect {#blank#}8{#/blank#}. If you have to go home late, you should let your parents know. Use the Internet {#blank#}9{#/blank#}. The Internet can be very useful for your studies. But some things on the Internet aren't good {#blank#}10{#/blank#} kids, so try to look at Websites that are good for you.

3.填空题(共8题)

11.
的立方根是__________.
12.
如图是某校的平面示意图的一部分,若用“(0,0)”表示图书馆的位置,“(0,-3)”表示校门的位置,则教学楼的位置可表示为
13.
正比例函数y=kx的图象经过点(1,﹣1),则k的值是_____.
14.
写一个y随x的增加而增大的一次函数解析式
15.
已知函数:(1)图象不经过第二象限;(2)图象与直线y= x平行.请你写出一个同时满足(1)和(2)的函数关系式:
16.
如图,长方体的长为15 cm,宽为10 cm,高为20 cm,点B距离C点 5 cm,一只蚂蚁如果要沿着长方体的表面从点A爬到点B,需要爬行的最短距离是 cm.
17.
边长为2的正三角形的面积是   
18.
用长度相同的火柴棒首尾相连摆直角三角形,你认为至少要用 根才能摆成.

4.解答题(共5题)

19.
(1)计算:
(2)
20.
如图,在平面直角坐标系内,梯形OABC的顶点坐标分别是:A(3,4),B(8,4),C(11,0),点P(t,0)是线段OC上一点,设四边形ABCP的面积为S.

(1)过点B作BE⊥x轴于点E,则BE= ,用含t的代数式表示PC=
(2)求S与t的函数关系.
(3)当S=20时,直接写出线段AB与CP的长.
21.
甲、乙两同学在一次百米赛跑中,路程S(米)与时间t(秒)之间的关系如图所示.根据图象回答下列问题:

(1)3.8秒时,哪位同学处于领先位置?
(2)在这次赛跑中,哪位同学先到达终点?比另一个同学早多少时间到达?约几秒后哪位同学被哪位同学追上?
(3)甲同学所走的路程S(米)与时间t(秒)之间的函数关系式.
22.
先化简,再求值(a+b)2+(a-b)(2a+b)-3a2,其中:a=,b=
23.
如图,求图中直线的函数表达式:
试卷分析
  • 【1】题量占比

    单选题:(9道)

    选择题:(1道)

    填空题:(8道)

    解答题:(5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:11

    7星难题:0

    8星难题:5

    9星难题:6