报检员允许同时兼任两个或两个以上报检企业的报检工作。 ( )
参考答案：错
He has a friend who _______ the piano very well. [ ]
A. play
B. playing
C. plays
D. played
良性高血压的基本病变是（）
A.增生性细小动脉炎
B.细小动脉的纤维素样坏死
C.细小动脉痉挛
D.肉芽肿性小动脉炎
E.细动脉玻璃样变性
