满分5 >
初中数学试题 >
把A、K、Q三张扑克牌背面朝上,随机排成一行,则翻开后A牌恰好排在中间的概率是(...
把A、K、Q三张扑克牌背面朝上,随机排成一行,则翻开后A牌恰好排在中间的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943006_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943006_ST/3.png)
考点分析:
相关试题推荐
已知AB、CD是两个不同圆的弦,如AB=CD,那么
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943005_ST/0.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943005_ST/1.png)
的关系是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943005_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943005_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943005_ST/4.png)
D.不能确定
查看答案
下列四个三角形中,与图中的三角形相似的是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943004_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943004_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943004_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943004_ST/images3.png)
D.
查看答案
函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943003_ST/0.png)
的图象与直线y=x没有交点,那么k的取值范围是( )
A.k>0
B.k<0
C.k>1
D.k<1
查看答案
有一个锐角是30°的直角三角形中,斜边长为1cm,则斜边上的高为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943002_ST/0.png)
cm
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943002_ST/1.png)
cm
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943002_ST/2.png)
cm
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943002_ST/3.png)
cm
查看答案
正方形网格中,∠AOB如图放置,则cos∠AOB的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943001_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943001_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943001_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000613935794373/SYS201311030006139357943001_ST/2.png)
D.2
查看答案