单项选择题
A person reports to you with a fishhook in his thumb. To remove it you should（）.
A.pull it out with pliers
B.cut the skin from around the hook
C.push the barb through，cut it off，then remove the hook
D.have a surgeon remove it
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单项选择题
（）is used for lifting cargo.
A.A mooring winch
B.A windlass
C.A deck crane
D.A lifeboat engine -
单项选择题
Fire is under control，and（）.
A.lifeboat is no longer needed
B.lifeboat is needed badly
C.lifeboat is needed not more
D.lifeboat is urgently needed
