如图,AB是⊙O的直径,C、D是⊙O上两点,CD⊥AB,若∠DAB=70°,则∠BOC=( )
A.70° B.130° C.140° D.160°
相关知识点
推荐试卷
如图,AB是⊙O的直径,C、D是⊙O上两点,CD⊥AB,若∠DAB=70°,则∠BOC=( )
A.70° B.130° C.140° D.160°
试题篮
()