When a pushing vessel and a vessel（）ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel.<br>A:is pushed<br>B:being pushed<br>C:was pushed<br>D:be pushed

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

出自：海船船员证

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