正确答案: C

30～50天

题目：海上求生者在有淡水无食物时仍可生存：

解析：C

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举一反三的答案和解析：

[单选题]大部分的植物油被评为()类化学品。

Y

[单选题]The amount of fluid delivered by a positive displacement pump can be regulated by _____.

changing the speed of the driving rotor

[单选题]______是船员的身份证明，用以加强海员出入境管理。

海员证

[单选题]当直升机接近难船时，按常规由：

尾部

[单选题]单螺杆泵万向轴的销轴的润滑是靠( )。

润滑脂

[单选题]Vessels having main engines arranged for air starting are to be provided with at least__.

two air starting containers of approximately equal size

[单选题]Which statement is True?

Even the flag State has no right to check the SSP thoroughly