單項(xiàng)選擇題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


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1.單項(xiàng)選擇題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

3.單項(xiàng)選擇題All the traces are()old ones.

A.clear
B.evident
C.obvious
D.apparently

4.單項(xiàng)選擇題A man was sighted as he fell overboard. After completing a Williamson turn,the man is not sighted. What type of search should be conducted?()

A.Expanding circle
B.Sector search
C.Parallel track pattern
D.Datum-drift search

5.單項(xiàng)選擇題()the visibility to reduce to one mile by heavy rain,it()be impossible to rescue the vessel in distress.

A.Was/would
B.Were/would
C.Is/will
D.Is/is to