What's his name?[ ]
A. An American friend.
B. She has long hair.
C. His name is Mike.
答案:C
某电解质溶液中可能存在的离子为:Ag+、H+、Cu2+、CO32-、OH-、Cl-,你认为可以肯定存在的离子有
_________,肯定没有的离子是_________ ,还需进一步确认的离子有________,确认的实验方法是___________________。
为什么说水泥助磨剂有利于高细粉磨和超细粉磨?