在下列脱水药剂中， _____是常用的。Among the following dehydrating agents, _____ is commonly used. A: FeCl3·6H2O B: PBC C: 阴离子型PAMAnionic PAM D: 阳离子型PAMCationic PAM
在下列脱水药剂中， _____是常用的。Among the following dehydrating agents, _____ is commonly used. A: FeCl3·6H2O B: PBC C: 阴离子型PAMAnionic PAM D: 阳离子型PAMCationic PAM
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