单项选择题

Generally，you can best keep a vessel under steering control when the vessel has（）.

A.headway
B.sternway
C.no way on，with engines stopped
D.no way on，with engines full ahead

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单项选择题
Generally speaking，the most favorable bottom for anchoring is（）.

A.very soft mud
B.rocky
C.a mixture of mud and clay
D.loose sand
单项选择题
As a last resort，a tourniquet can be used to（）.

A.hold a victim in a stretcher
B.stop uncontrolled bleeding
C.hold a large bandage in place
D.restrain a delirious victim
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