证券组合管理的主要内容包括:计划、选择时机、选择证券、修正、评价。()
参考答案:错
7. ---________ do you think of the play we saw just now?
---Wonderful! But not as interesting as the one we saw last Saturday.
A.What
B.How
C.Why
D.Where
水泥混凝土一般采用直线形路拱,其路拱坡度为()。
A.0.5-1%
B.1.0-1.5%
C.1.5-2.0%
D.2.0-2.5%