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單項選擇題A very light breeze that causes ripples on a small area of still water is a（）.

A.cat's paw
B.hog's breath
C.williwaw
D.chinook

1.單項選擇題A thin，whitish，high cloud popularly known as mares tails is（）.

A.altostratus
B.stratus
C.cumulus
D.cirrus

2.單項選擇題A strong，often violent，northerly wind occurring on the Pacific coast of Mexico，particularly during the colder months，is a（）.

A.Papagayo
B.fall wind
C.foehn
D.williwaw

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

A.Tehuan tepecer
B.Papagayo
C.Norther
D.Pampero

4.單項選擇題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

5.單項選擇題A steep barometric gradient indicates（）.

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