题目

根据对话的上下文，在横线上写出所缺少的内容。 A: Hello! B: Hello?   1   Mrs. Green? A: Yeah. Who’s that? B:   2   Li Hua speaking. I called to ask for help with my English. A: I’d be glad to help. What’s the problem? B: I read very slowly. A: Well, I have an idea that may help.   3   read more easy story books. B:   4  . I’ll try that. A: Also, I think reading after tapes can help a lot. B:   5   for your advice. A: You’re welcome. Goodbye. B: Bye-bye.下列有关胶体的叙述不正确的是 A．胶体粒子直径在1－100nm之间           B．氢氧化铁胶体属于纯净物 C．净水剂在水中形成的分散系是胶体         D．光束通过胶体时有丁达尔效应