— What's ____________? — Sixty.[ ] A. tw

菱形ABCD的周长为20，一条对角线AC长为6，则菱形的面积为______．

— You speak very good French!

— Thanks. I _____ French in Sichuan University for four years. [ ]

A. studied

B. study

C. was studying

D. had studied

当存货为非商品存货时，如原材料等，期末应将已出售的非商品存货的实际成本结转至当期其他业务成本。

All the losses（）from your delay in shipping our goods will be for your account.

A.rising

B.arising

C.raising

D.arousing

m序列如何产生的？