How long must GMDSS Radio Logs be retained_爱下问搜题

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问题单项选择题

How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）

A.6 months

B.1 year

C.2 years

D.3 years

答案

参考答案：D

选择题

I don't ______ rock 'n' roll. It's much too noisy for my taste. [ ]

A. go after

B. go away with

C. go into

D. go in for

单项选择题

透光性低密度结石的主要成份多是（）。

A.草酸钙

B.磷酸钙

C.磷酸胺镁

D.胱氨酸钙

E.尿酸类