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單項選擇題

When a pushing vessel and a vessel（）ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel.

A.is pushed
B.being pushed
C.was pushed
D.be pushed

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單項選擇題

When a vessel is aground,（）.

A.she is underway
B.she is not underway
C.whether she is underway cannot be determined
D.she might be or not be underway

單項選擇題

When did you check the contents of C0₂ cylinders（）.

A.by counting
B.by calculating
C.by weighing
D.by filling

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