如图,AB、AC是⊙O的两条切线,B、C是切点,若∠A = 70°,则∠BOC的度数为 ( )
A.100° B.110° C.120° D.130°
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如图,AB、AC是⊙O的两条切线,B、C是切点,若∠A = 70°,则∠BOC的度数为 ( )
A.100° B.110° C.120° D.130°
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