满分5 >
初中数学试题 >
如图是一个由正方形ABCD和半圆O组成的封闭图形,点O是圆心.点P从点A出发,沿...
如图是一个由正方形ABCD和半圆O组成的封闭图形,点O是圆心.点P从点A出发,沿线段AB,弧BC和线段CD匀速运动,到达终点D.运动过程中OP扫过的面积(s)随时间(t)变化的图象大致是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029009_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029009_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029009_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029009_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029009_ST/images4.png)
考点分析:
相关试题推荐
已知下列命题:①同旁内角互补;②圆心到直线上一点的距离恰好等于圆的半径,则该直线是圆的切线;③对角线相等且互相垂直的四边形是正方形;④两圆没有公共点则它们的位置关系是外离;⑤已知一圆锥的高为4,母线长为5,则该圆锥的侧面积为15π.其中真命题的个数有( )个.
A.0
B.1
C.2
D.3
查看答案
如图,已知直线l
1∥l
2∥l
3∥l
4,相邻两条平行直线间的距离都是1,如果正方形ABCD的四个顶点分别在四条直线上,则cosα=( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029007_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029007_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029007_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029007_ST/2.png)
D.
查看答案
如图,AA′,BB′分别是∠EAB,∠DBC的平分线.若AA′=BB′=AB,则∠BAE的度数为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029006_ST/images0.png)
A.150°
B.168°
C.135°
D.160°
查看答案
在6张完全相同的卡片上分别画上线段、等边三角形、平行四边形、直角梯形、正方形、圆,在看不见图形的情况下随机摸出1张,这张卡片上的图形既是中心对称图形又是轴对称图形的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029005_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029005_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029005_ST/2.png)
D.
查看答案
下列函数关系式①y=-3x;②y=2x-1;③
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029004_ST/0.png)
;④y=-x
2+2x+3,⑤
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190906720502991/SYS201311011909067205029004_ST/1.png)
,其中y的值随x值的增大而增大的有( )个.
A.4
B.3
C.2
D.1
查看答案