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單項選擇題

The difference between the heights of low and high tide is the（）.

A.period
B.range
C.distance
D.depth

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單項選擇題

The current rates（）excess of 2 kn may occur with prolonged strong winds.

A.by
B.with
C.on
D.in

單項選擇題

The Brazil Current flows in which general direction? （）

A.Northwesterly
B.Southwesterly
C.Southerly
D.Northerly