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如图,⊙O中,弦AB、CD相交于点P,若∠A=30°,∠APD=70°,则∠B等...
如图,⊙O中,弦AB、CD相交于点P,若∠A=30°,∠APD=70°,则∠B等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101636668606121/SYS201311031016366686061017_ST/images0.png)
A.30°
B.35°
C.40°
D.50°
考点分析:
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