问题
填空题
蒸发浓缩进行的必要条件包括不断供给热能和（），常用的热源为饱和蒸汽。
答案
参考答案：不断排除二次蒸汽
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蒸发浓缩进行的必要条件包括不断供给热能和（），常用的热源为饱和蒸汽。
参考答案：不断排除二次蒸汽
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| Mr Smith was having trouble with his stomach, 1 he went to see a doctor. The doctor 2 his stomach carefully but couldn't find any problem. Then he said, "Well, Mr Smith, take it easy. There is 3 serious. Stop smoking and then you will be all right very 4 ." "But doctor," answered Mr Smith, "I 5 . I don't like smoking at all." "Oh, I see," said the doctor," then stop 6 wine from now on." "But I don't drink wine," answered Mr Smith. "Don't drink 7 tea or coffee then," the doctor said to him. "I _8 drink water," answered Mr Smith, "I don't like tea or coffee." The doctor _9_ for a while and then said," Well, what do you like to eat then?" "Potatoes! I like potatoes very much." Mr Johnson answered at once. "All right, Then stop 10 potatoes." Said the doctor as he got up to say goodbye to Mr Smith. | ||||
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