A strong，often violent，northerly wind occurring on the Pacific coast of Mexico，particularly during the colder months，is called（）.

A storm is forecast for the area where your vessel is moored. For its safety you should put（）.

A.more slack in the mooring lines
B.a strain on the mooring lines
C.chafing gear on the mooring lines
D.grease on the mooring lines

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A steep barometric gradient indicates（）.

A.calms
B.light winds
C.strong winds
D.precipitation

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