北师大版2018-2019学年八年级数学上册 第1章 勾股定理 单元测试题

适用年级:初二
试卷号:209797

试卷类型:单元测试
试卷考试时间:2018/12/11

1.选择题(共2题)

1.下列各式中,属于正确的电离方程式的是(   )
2.

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

    It's always thought that only those heavy things make people hard to endure.But as a matter of fact,those slight things are {#blank#}1{#/blank#} (much) difficult to resist.It's slight,but it will always be in the bottom of your heart,making it {#blank#}2{#/blank#} (possible) for you to get rid of it all through your life.

    It's just like John Nash in “A Beautiful Mind”.You can imagine how terrible it is to live in a world full of mental illusion.When he realizes {#blank#}3{#/blank#} (clear) about all of these but can't get rid of the illusions,his mentality will be on the edge {#blank#}4{#/blank#}  collapsing.On the other hand,Nash is happy and {#blank#}5{#/blank#}  (luck) because his wife companied with him.She used her wifely heart to forgive all.When her husband {#blank#}6{#/blank#}  (be) weak,she opened the window of his heart with her soft hands.She used her wifely endurance to go forward step by step in the difficult life.She used her wifely {#blank#}7{#/blank#}  (persist) of love.

    I can still remember the scene that when old Nash {#blank#}8{#/blank#} (stand) on the stage of Nobel Prizes,he looked at his wife full of love.I think Nash has found the answer of Balance Theory {#blank#}9{#/blank#}  he has been studying throughout his life.The balance of his life is the love of his wife.

    {#blank#}10{#/blank#}  changes a lot with time,only love will last forever.

2.单选题(共5题)

3.
在△ABC中,AB=15,AC=13,BC上的高AD长为12,则△ABC的面积为(  )
A.84B.24C.24或84D.42或84
4.
如图,在△ABC中,ADBC于点DAB=17,BD=15,DC=6,则AC的长为(  ).
A.11B.10C.9D.8
5.
底边上的高为3,且底边长为8的等腰三角形腰长为(  ).
A.3B.4C.5D.6
6.
如图,一只蚂蚁从A点沿圆柱侧面爬到顶面相对的B点处,如果圆柱的高为8cm,圆柱的半径为cm,那么最短路径AB长(    )
A.8B.6C.平方后为208的数D.10
7.
一个圆桶,底面直径为24 cm,高32cm,则桶内所能容下的最长木棒为(    ) .
A.24cmB.32cmC.40 cmD.45

3.填空题(共5题)

8.
等腰三角形一腰长为5,一边上的高为4,则其底边长为________.
9.
四根小木棒的长分别为5cm,8cm,12cm,13cm,任选三根组成三角形,其中有______个直角三角形.
10.
如图,圆柱形玻璃杯高为12cm、底面周长为18cm,在杯内离杯底4cm的点C处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿4cm与蜂蜜相对的点A处,则蚂蚁到达蜂蜜的最短距离为_______cm.
11.
观察图形后填空.
图(1)中正方形A的面积为__________;
图(2)中斜边x=________.
12.
东东想把一根70 cm长的木棒放到一个长、宽、高分别为30 cm,40 cm,50 cm的木箱中,他能放进去吗?答:______. (填“能”或“不能”)

4.解答题(共1题)

13.
如图,一架云梯长25 m,斜靠在一面墙上,梯子靠墙的一端距地面24 m.

(1)这个梯子底端离墙有多少米?
(2) 如果梯子的顶端下滑了4m,那么梯子的底部在水平方向也滑动了4m吗?为什么?
试卷分析
  • 【1】题量占比

    选择题:(2道)

    单选题:(5道)

    填空题:(5道)

    解答题:(1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:1

    7星难题:0

    8星难题:0

    9星难题:10