单项选择题 虎杖主治（）。

未知题型 听力原文：W: There is a limit of three books each person, but you take four books. M: Thank you for telling me this. Ill drop this one and be certain to return the other three on time. Q: Where does the conversation most probably take place?2．A．She missed the deadline for the course registration.B．She couldn't decide which course to register.C．She didn't get the extension for the course registration.D．She lost the registration fee.

单项选择题 根据期限结构的预期理论，如果人们预期接下来3年的短期利率平均为6％，那么还有3年到期的债券的利率