满分5 >
初中数学试题 >
如图,AB是⊙O的直径,CD是⊙O的切线,C为切点,∠B=25°,则∠D等于( ...
如图,AB是⊙O的直径,CD是⊙O的切线,C为切点,∠B=25°,则∠D等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682006_ST/images0.png)
A.25°
B.50°
C.30°
D.40°
考点分析:
相关试题推荐
图1所示的几何体,由4个大小相同的正方体搭成,现增加2个大小相同的正方体,所得几何体的三视图如图2所示,则增加的两个正方体放在( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682005_ST/images0.png)
A.1号的左右
B.2号的前后
C.3号的前后
D.4号的前后
查看答案
若x=2是关于x的方程2x+3m-1=0的解,则m的值为( )
A.-1
B.0
C.1
D.
查看答案
如图,四边形ABCD中,∠A+∠B=200°,∠ADC、∠DCB的平分线相交于点O,则∠COD的度数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682003_ST/images0.png)
A.80°
B.90°
C.100°
D.110°
查看答案
若分式
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682002_ST/0.png)
有意义,则x的取值范围是( )
A.x≠3
B.x>-2
C.x<-2
D.x≠-2
查看答案
不等式组
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682001_ST/0.png)
的解集在数轴上表示正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682001_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682001_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164832673468265/SYS201310221648326734682001_ST/images3.png)
D.
查看答案