题目

Never before have I heard ______beautiful music played by _____common an instrument. A．such; so              B．so; so               C．such; such               D．so; such 答案：A如图，在⊙O的内接四边形ABCD中，AB是直径，∠BCD=120°，过D点的切线PD与直线AB交于点P，则∠ADP的度数为（　　）A. 40° B. 35° C. 30° D. 45°