境内上市外资股又称B股，是指在中国境内注册的股份有限公司向境内外投资者发行并在中国境内证券交易所上市交易的股票。（）
参考答案：对
—Could you tell me________?
—About two months．[ ]
A．when are you leaving for Shanghai
B．how often you go to the school library
C．how many tickets have you booked
D．how long you have been at this school
人民币的单位是（）。
A．元
B.角
C．分
D．厘
