单项选择题
The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.
A.safe speed only specified B.not less than 120 feet per minute C.not more than 120 feet per minute D.not more than 90 feet per minute
单项选择题 The first treatment given to a person overcome by benzene vapor should be to（）.
单项选择题 The FIRST treatment for a surface burn is to（）.
单项选择题 The device that allows a floating ship to sway without bending the marine riser system is the（）.
