单项选择题
A.KF·2H2OB.K2F·2H2OC.K2F2·2H2OD.KF·3H2O
A.Zn(CH2COO)3·2H2OB.Zn(CH2COO)2·2H2OC.ZnCH2COO·2H2OD.Zn(CH2COO)2·3H2O
A.CHCOONa·3H2OB.CH2COONa·3H2OC.CH3COONa·3H2OD.CH3COONa·4H2O
A.8B.10C.12D.15
A.120B.150C.180D.200
A.1500B.1000C.500D.850
A.10-20%B.20-30%C.20-50%D.30-50%
A.0.10B.0.25C.0.50D.0.35
A.0.05B.0.10C.0.50D.0.45
A.0.30B.0.40C.0.50D.0.35
A.200B.220C.230D.210