未知题型 听力原文：M: Can you help me work out this question?W: All right.Q: What's the relationship between the two speakers?(19)A.They are husband and wifE.B.They are waiter and guest.C.They are teacher and student.

多项选择题 关于政策性金融机构的说法，正确的有（　　）。

多项选择题 假设有一份3×9的远期利率协议，关于这份协议的说法，正确的XX