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如图,⊙O的直径AB=4,点C在⊙O上,∠ABC=30°,则AC的长是( ) A...
如图,⊙O的直径AB=4,点C在⊙O上,∠ABC=30°,则AC的长是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101636668606121/SYS201311031016366686061021_ST/images0.png)
A.1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101636668606121/SYS201311031016366686061021_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101636668606121/SYS201311031016366686061021_ST/1.png)
D.2
考点分析:
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