单项选择题

The litter on a ship must be able to（）.

A.carry at least two injured persons
B.float for at least two hours
C.be used on the types of helicopters serving the unit
D.All of the above

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单项选择题
The lifesaving signal indicating You are seen - assistance will be given as soon as possible is the（）.

A.vertical motion of white flags
B.vertical motion of a white light or flare
C.firing of a green star signal
D.None of the above
单项选择题
The holding power of an anchor is the（）.

A.maximum sustained vertical load an anchor will resist before dragging
B.maximum sustained horizontal load an anchor will resist before dragging
C.maximum sustained vertical load an anchor will resist before the mooring line breaks
D.maximum sustained horizontal load an anchor will resist before the mooring line breaks
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