All engines in lifeboats and rescue boats shall be run for a total period of not less than（）in weekly inspections.<br>A:2 minutes<br>B:3 minutes<br>C:4 minutes<br>D:5 Minutes

All engines in lifeboats and rescue boats shall be run for a total period of not less than（）in weekly inspections.
A:2 minutes
B:3 minutes
C:4 minutes
D:5 Minutes

出自：海船船员证

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