久期最长的债券是 ( )
A.高附息30年期债券
B.低附息30年期债券
C.零息30年期债券
D.无法判断
参考答案:C
The novel will________soon, and I think, it will be well received by the teenagers. [ ]
A. put out
B. turn out
C. come out
D. go out
为什么工作面“敲帮问顶”必须使用长把工具?