开关舱的工作通常是由船员来做。（）<br>A:The work of opening and closing hatches is usually done by crew members.<br>B:The work of opening and closing hatch covers is usually done by crew members.<br>C:The work of opening hatch covers is usually done by crew members.<br>D:The work of closing hatch covers is usually done by crew members.

开关舱的工作通常是由船员来做。（）
A:The work of opening and closing hatches is usually done by crew members.
B:The work of opening and closing hatch covers is usually done by crew members.
C:The work of opening hatch covers is usually done by crew members.
D:The work of closing hatch covers is usually done by crew members.

出自：船舶水手证

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