船舶的舱盖有多种类型。（）<br>A:There are several types of hatch covers on board ship.<br>B:There are several types of hatches on board ship.<br>C:There is one type of hatches on board ship.<br>D:There is one type of hatch covers on board ship.

船舶的舱盖有多种类型。（）
A:There are several types of hatch covers on board ship.
B:There are several types of hatches on board ship.
C:There is one type of hatches on board ship.
D:There is one type of hatch covers on board ship.

出自：船舶水手证

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