單項(xiàng)選擇題

很多船上在每個(gè)艙口處都有兩個(gè)吊桿及兩臺(tái)起貨機(jī)。()

A. Many ships have two derricks at each hatch.
B. Many ships have two winches at each hatch.
C. Many ships have two derricks and two winches at each hatch.
D. Many ships have two derricks and two winches at each hatch cover.

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