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單項選擇題

A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground

你可能感興趣的試題

A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water

A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current