单项选择题
A wildcat ia a（）.
A.deeply-grooved drum on the windlass with sprockets with engage the links of the anchor chain
B.winch that running out of control due to a failure of the overspeed trips
C.line that has jumped off the gypsyhead while under strain
D.nylon line that parts under strain and whips back in a manner
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A.list
B.heel
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Aboard a survival craft,ether can be used to（）.
A.start the engine in cold weather
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Above-normal tides near the center of a hurricane maybe caused by the（）.
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B.jet stream
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