單項(xiàng)選擇題

The type of current which will have the greatest effect on the course made good for your vessel is（）.

A.one flowing in the same direction as your course steered
B.one flowing in the opposite direction as your course steered
C.one that flows at nearly right angles to your course steered
D.a rotary current in which the direction of current flow constantly changes

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單項(xiàng)選擇題

The two most effective generating forces of surface ocean currents are（）.

A.temperature and salinity differences in the water
B.wind and density differences in the water
C.water depth and underwater topography
D.rotation of the Earth and continental interference

單項(xiàng)選擇題

The tide is（）.

A.black
B.setting
C.being
D.having

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The type of current which will have the greatest effect on the course made good for your vessel is（）.

你可能感興趣的試題

The two most effective generating forces of surface ocean currents are（）.

The tide is（）.