问题
单项选择题
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
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
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
参考答案：B