题目

如图,已知⊙O是△ABD的外接圆,AB是⊙O的直径,CD是⊙O的弦,∠ABD=58°，则∠BCD等于（   ）   A.116°              B.32°                  C.58°                D.64°                                   答案：BDo you have any trouble           the foreigners?A．to understandB．understandingC．understandD．understood[