單項選擇題

A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)（）.

A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current

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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

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

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