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问题 单项选择题

属于封闭式引流的是（）

A.片状引流

B.管状引流

C.纱条引流

D.负压引流

E.以上都不是

答案

参考答案：D

单项选择题

双杆作业舷外吊杆的舷外跨距应不小于中部船宽舷外（）或船舶所有人要求的舷外跨距。

A.2.5m

B.3.5m

C.4m

D.4.5m
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单项选择题

An investor gathered the following information about two 7 percent annual-pay, option-free bonds: Bond R has 4 years to maturity and is priced to yield 6 percent Bond S has 7 years to maturity and is priced to yield 6 percent Both bonds have a par value of $1000. Given a 50 basis point parallel upward shift in interest rates, what is the value of the two-bond portfolio（）

A. $2044.

B. $2030.

C. $2086.
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