通过专业金融主体实现的金融交易称为()。
A.专业金融
B.非专业金融
C.直接金融
D.间接金融
参考答案:D
I had hoped to see her off at the station, but I _____ too busy.
A.was
B.had been
C.would be
D.would have been
正火是将钢加热到临界温度以上(),保温一段时间,然后在空气中冷却。
A.20~40
B.30~50
C.40~60