单项选择题
The first treatment given to a person overcome by benzene vapor should be to（）.
A.remove them to fresh air B.flush their face with water for about 5 minutes C.stand them up and walk them around D.remove their clothing and wrap them in blankets
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（）.
单项选择题 The depth over a shallow patch，（）about 1．5 miles southeastward of Nanshan Tou lighthouse，reduces to 8 meters.
