【单选题】
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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搜题
更多“When a pushing vessel and a vessel（）ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel.”相关的问题
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