A.C2H6•6H20 B.C2H8•17H20 C.C2H6•8H20 D.C2H6•17H20
A.甲醇 B.乙醇 C.甲二醇 D.苯
A.0.7~0.8 B.0.8~0.9 C.0~1.0 D.1.0~1.1