证券的价格由货币使用中产生的收益与社会借贷资金利率之间的比率所决定。 ( )
参考答案:对
The boy dived into the water and after ______ seemed to be a long time, he came up again.
A.what
B.that
C.it
D.which
Ⅱ形梁桥一般只用于( )的小跨径桥梁。
A.6~12m
B.7.5~20m
C.20~40m
D.16~20m