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單項選擇題

（）(停頓) for a while when the boat leaves the surface.

A.Halting
B.Halt
C.Adjust
D.Heave

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單項選擇題

（）(所有船員) must know the locations as well as the operations of the life-saving and fire-fighting appliances.

A. All officers
B. All engineers
C. All the crew
D. AB and C

單項選擇題

Second Officer, give one （）(長聲).

A. blast
B. short blast
C. prolonged blast
D. prolonged blasts