满分5 >
初中数学试题 >
(2012•云和县模拟)⊙O1和⊙O2的半径分别为方程:x2-7x+10=0的两...
(2012•云和县模拟)⊙O
1和⊙O
2的半径分别为方程:x
2-7x+10=0的两个根,O
1O
2=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570005_ST/0.png)
,则⊙O
1和⊙O
2的位置关系是( )
A.内含
B.内切
C.相交
D.外切
考点分析:
相关试题推荐
(2008•菏泽)“上升数”是一个数中右边数字比左边数字大的自然数(如:34,568,2469等).任取一个两位数,是“上升数”的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570004_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570004_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570004_ST/2.png)
D.
查看答案
如图,菱形ABCD的边长为10cm,DE⊥AB,sinA=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570003_ST/0.png)
,则这个菱形的面积是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570003_ST/images1.png)
A.30cm
2B.60cm
2C.6cm
2D.3cm
2
查看答案
开学初,学校红十字会开展“爱心助学”活动,九年级10个班级的捐款分别为180,186,172,200,215,168,198,252,150,300,(单位:元)那么这组数据的中位数是( )
A.198
B.192
C.186
D.183
查看答案
(2010•呼和浩特)下列图形中,既是轴对称图形又是中心对称图形的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570001_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570001_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570001_ST/images2.png)
D.
查看答案
下列各式中与代数式
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570000_ST/0.png)
的值相等的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570000_ST/1.png)
B.2sin45°
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230619152257025/SYS201310212306191522570000_ST/2.png)
D.
查看答案