【評論主題】32.關於石膏(gypsum)的調拌,下列何者可以加速其硬化時間(setting time)?(A)用5℃的冰水調拌 (B)用slurry water調拌 (C)用含有2 mM borax的水調拌 (
【評論內容】硼酸(borax):大於0.2mM會減速,小於0.2mM加速