A:胶体是纯净物,氢氧化铁胶体带正电
B:胶体与溶液的本质区别是有丁达尔效应
C:将饱和氯化铁溶液滴入稀氢氧化钠溶液中加热,可得氢氧化铁胶体
D:胶体属于介稳体系
My House
I am Jenny. Look! This is my house. What's in the house? Let me show you the rooms. This is the kitchen. Here is the bathroom. That is the living room. Here is my bedroom. That is Danny's bedroom. His bedroom is very nice.
下列实验操作正确的是( )
抄写词语
不遗余力 抬起 强烈