单项选择题
A.An amount equal to the depth of the water B.Two times the depth of water C.Three to four times the depth of water D.Five to seven times the depth of water
What is the MOST irritating to the skin?（）A.Carbon disu...
单项选择题What is the MOST irritating to the skin?（）
A.Carbon disulfide B.Ethyl alcohol C.Isoprene D.Oleum
What is the（）of the turning circle in mavoeuvring?A.dis...
单项选择题What is the（）of the turning circle in mavoeuvring?
A.distance B.largeness C.diameter D.measurerment
What is required to launch a boat stowed in a crescent ...
单项选择题What is required to launch a boat stowed in a crescent davit?（）
A.Hoist the boat clear of the cradle B.Release the outboard part of the cradle C.Rig the tricing lines D.Crank the crescent out
