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如图,PA、PB是⊙O的切线,切点分别是A,B,如果∠P=60°,那么∠AOB等...
如图,PA、PB是⊙O的切线,切点分别是A,B,如果∠P=60°,那么∠AOB等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161810993529826/SYS201310221618109935298009_ST/images0.png)
A.60°
B.90°
C.120°
D.150°
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