A.28≤Ft≤35 B.28≤Ft≤45 C.35 D.45
A.20 B.25 C.30 D.50
A.乙 B.甲 C.丁 D.丙
A.1,1.4,0.9 B.1.1,1.4,0.9 C.0.9,1.5,0.9 D.1.1,1.5,0.9
A.闪点 B.自燃点 C.熔点 D.爆炸下限