发生紧急情况时，船员应知道他们该干什么。（）<br>A:Crew members don’t know what they do during emergency.<br>B:Crew members should know what they do in an emergency.<br>C:Crew members know what they should do during ship abandoning.<br>D:Crew members know what they do during ship abandoning.

发生紧急情况时，船员应知道他们该干什么。（）
A:Crew members don’t know what they do during emergency.
B:Crew members should know what they do in an emergency.
C:Crew members know what they should do during ship abandoning.
D:Crew members know what they do during ship abandoning.

出自：船舶水手证

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