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單項(xiàng)選擇題

Course directed by the 0SC or CSS to be steered at the beginning of a search is（）.

A.original course
B.initial course
C.final course
D.designated course

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單項(xiàng)選擇題

Engine room is（）fire.

A.on
B.in
C.at
D.out

單項(xiàng)選擇題

Floating, caused by winds and current with a determinable direction defines（）.

A.floating
B.sailing
C.drifting
D.running into danger

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