问题
单项选择题
膜分离法中的电渗析（）主要是用来去除水中的（）。
A.水和非电解质分子
B.胶体颗粒
C.大分子溶质
D.所有成分
答案
参考答案：A
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膜分离法中的电渗析（）主要是用来去除水中的（）。
A.水和非电解质分子
B.胶体颗粒
C.大分子溶质
D.所有成分
参考答案：A
Tom and Fred were talking about the year 2050. “What will 1 be like in the year 2050?” asked Tom. “I don’t know,” said Fred. “What do you think?” “Well, no one knows. But it is __2__ to guess,” said Tom. “In the year 2050 everybody will carry a pocket (袖珍) __3___. The computer will give people the __4__ to all their problems. We shall all have telephones in our pockets,__5___ . And we’ll be able to talk to our friends all over the world. Perhaps(也许) we’ll be able to ___6__ them at the same time. Machines will do ___7___of the work, and people will have more__8__. Perhaps they will work only two or three days a week. They will be able to fly to the moon by spaceship and spend their holidays there.” “I’m very _9__to hear that. I hope to fly to the moon. And I hope I’ll be able to live _10___,” said Fred. “Won’t that be interesting? Just like a fish.”
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