ETF实行～级市场与二级市场并存的交易制度，中小投资者被排斥在外。（）
参考答案：错
--- Excuse me. Where’s the school library, please?
--- ________________
--- I asked where the school library was.
A．All right.
B．Mm, let me think.
C．What do you mean ?
D．Oh, I beg your pardon ?
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