负责落地处理的柜员交易掩码第（）位，应用掩码第（）位必须开通。
A.1；8
B.2；8
C.1；7
D.2；7
参考答案：B
My uncle lives in Shanghai. My father ______ him when he went to Shanghai on business. [ ]
A. dropped off
B. dropped into
C. dropped by
D. went past
《天鹅湖》乐曲的作曲人是（）
A、贝多芬
B、莫扎特
C、德沃夏克
D、柴可夫斯基
