期权价格都将随标的物价格波动的增大而提高,随标的物价格波动的缩小而降低。()
参考答案:对
The old man ____ down by a truck is being saved now.
A.knocking
B.to knock
C.knocked
D.being knocked
证券投资基金的资金主要投向( )。
A.实业
B.邮票
C.有价证券
D.珠宝