题目

Your good friends don’t______ agree with you in everything，for they can have their Own opinions． A．really           B．approximately    C．eventually       D．necessarily 答案：D 如图，AB是⊙O的直径，CD是弦，且CD⊥AB，若BC＝6，AC＝8，则sin∠ABD的值为 [　　] A． B． C． D．