新人教版九年级（上）期末数学检测卷C（一）

1、2013-2014学年新人教版九年级（上）期末数学检测卷c（一）一、选择题（每小题3分，共24分）1下列根式中不是最简二次根式的是（）a2b6c8d10显示解析2用配方法解一元二次方程x2-4x-5=0的过程中，配方正确的是（）a（x+2）2=1b（x-2）2=1c（x+2）2=9d（x-2）2=9显示解析3下面四个标志图是中心对称图形的是（）abcd显示解析4在下列图形中，为中心对称图形的是（）a等腰梯形b平行四边形c正五边形d等腰三角形显示解析5掷一枚质地均匀的硬币10次，下列说法正确的是（）a每2次必有1次正面向上b可能有5次正面向上c必有5次正面向上d不可能有10次正面向上显示解析6一

2、次排球友谊赛，参赛队中每两队都要赛场若此次友谊赛共66场，则本次参赛球队有（）a14队b13队c12队d11队显示解析7若圆锥的底面半径为5cm，侧面积为65cm2，则该圆锥的高是（）a13cmb12cmc11cmd10cm显示解析8如图，在平面直角坐标系中，p的圆心是（2，a）（a2），半径为2，函数y=x的图象被p截得的弦ab的长为23，则a的值是（）a22b2+2c23d2+3显示解析二、填空题（每小题3分，共24分）9若三角形的三边长分别为18，50和32，则它的周长为显示解析10方程（3x-1）2=（2-x）2的根是显示解析11如图，pa，pb是o是切线，a，b为切点，ac是o的直径

3、，若bac=25，则p=度显示解析12如图，两个同心圆，大圆半径为5cm，小圆的半径为3cm，若大圆的弦ab与小圆相交，则弦ab的取值范围是显示解析13若一个三角形的三边长均满足方程x2-6x+8=0，则此三角形的周长为显示解析14如果圆锥的底面周长是20，侧面展开后所得的扇形的圆心角为120则圆锥的母线是显示解析15如图，在rtabc中，acb=90，ac=bc=1，将rtabc绕a点逆时针旋转30后得到rtade，点b经过的路径为bd，则图中阴影部分的面积是显示解析16已知：如图，三个半圆依次相外切，它们的圆心都在x轴的正半轴上并与直线y=33x相切，设半圆c1、半圆c2、半圆c3的半径分

4、别是r1、r2、r3，则当r1=1时，r3=显示解析三、解答题（17，18，19题各8分，20，21，22题各10分，23，24，25，26题各12分，共102分）17计算：（1）(80+40)5（2）a38a+3a50a37a32a显示解析18用你熟悉的方法解方程：（x-3）2+2x（x-3）=0显示解析19实践与操作：如图1是以正方形两顶点为圆心，边长为半径，画两段相等的圆弧而成的轴对称图形，图2是以图1为基本图案经过图形变换拼成的一个中心对称图形（1）请你仿照图1，用两段相等圆弧（小于或等于半圆），在图3中重新设计一个不同的轴对称图形（2）以你在图3中所画的图形为基本图案，经过图形变换在

5、图4中拼成一个中心对称图形显示解析20如图，在边长为1个单位长度的小正方形组成的网格中，给出了格点abc（顶点是网格线的交点）和点a1（1）画出一个格点a1b1c1，并使它与abc全等且a与a1是对应点；（2）画出点b关于直线ac的对称点d，并指出ad可以看作由ab绕a点经过怎样的旋转而得到的显示解析21某商店从厂家以每件21元的价格购进一批商品，该商品可以自行定价，若每件商品售价为a元，则可卖出（350-10a）件但物价局限定每次商品加价不能超过进价的20%，商品计划要赚400元，需要卖出多少件商品？每件商品的售价应该是多少元？显示解析22小峰和小轩用两枚质地均匀的骰子做游戏，规则如下：每人

6、随机掷两枚骰子一次（若掷出的两枚骰子摞在一起，则重掷），点数和大的获胜；点数和相同为平局依据上述规则，解答下列问题：（1）随机掷两枚骰子一次，用列表法求点数和为2的概率；（2）小峰先随机掷两枚骰子一次，点数和为7，求小轩随机掷两枚骰子一次，胜小峰的概率（骰子：六个面分别刻有1、2、3、4、5、6个小圆点的小立方块，点数和：两枚骰子朝上的点数之和）显示解析23如图，已知直线pa交o于a、b两点，ae是o的直径，点c为o上一点，且ac平分pae，过c作cd丄pa，垂足为d（1）求证：cd为o的切线；（2）若dc+da=6，o的直径为10，求ab的长度显示解析24如图，pa、pb分别与o相切于点a、

7、b，点m在pb上，且omap，mnap，垂足为n（1）求证：om=an；（2）若o的半径r=3，pa=9，求om的长显示解析25如图1的矩形包书纸示意图中，虚线是折痕，阴影是裁剪掉的部分，四角均为大小相同的正方形，正方形的边长为折叠进去的宽度（1）如图2，思维游戏这本书的长为21cm，宽为15cm，厚为1cm，现有一张面积为875cm2的矩形纸包好了这本书，展开后如图1所示求折叠进去的宽度；（2）若有一张长为60cm，宽为50cm的矩形包书纸，包2本如图2中的书，书的边缘与包书纸的边缘平行，裁剪包好展开后均如图1所示问折叠进去的宽度最大是多少？显示解析26如图，在abc中，bac=90，ab=

8、ac=6，d为bc的中点（1）若e、f分别是ab、ac上的点，且ae=cf，求证：aedcfd；（2）当点f、e分别从c、a两点同时出发，以每秒1个单位长度的速度沿ca、ab运动，到点a、b时停止；设def的面积为y，f点运动的时间为x，求y与x的函数关系式；（3）在（2）的条件下，点f、e分别沿ca、ab的延长线继续运动，求此时y与x的函数关系式qcwa3ptgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauwydiawgmer4i30ka1dkaghn3xtk

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