单项选择题
Halon gas will decompose and may form very hazardous toxic fumes when discharged（）.
A.directly on flames B.at room temperature C.in an extremely cold climate D.None of the above
单项选择题 First aid treatment for small cuts and open wounds is to（）.
单项选择题 Cargo that gives off fumes that may contaminate other cargo is known as a(n) （）.
单项选择题 Blood flowing from a cut artery appears（）.
