试题与答案

必须对水源水进行净化处理,才能达到生活饮用水水质标准的要求,常规的给水净化工艺包括混

题型:多项选择题 案例分析题

题目:

必须对水源水进行净化处理,才能达到生活饮用水水质标准的要求,常规的给水净化工艺包括混凝沉淀.过滤和消毒。

饮用水消毒的主要目的有()。

A.杀灭病原菌预防介水传染病

B.保证饮用水在流行病学上安全

C.保持水中有余氯

D.消灭大肠杆菌

E.消灭虫卵,预防血吸虫病

F.改善水物理性状

答案:

参考答案:A, B, D, E

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题型:填空题

请认真阅读下面短文,并根据各题所给首字母的提示,写出一个合适的英语单词完整、正确的形式,使短文通顺。

     A blind (瞎的) man went to a shop with his dog. There were a lot of people waiting there to buy

tomatoes. Of course, people let the blind man to buy f__1__ and he asked for two kilos of t__2__.

     "But one p__3__ can only buy one kilo," said the woman unhappily.

     "But I have a dog. You should give one kilo to me and one kilo to my d__4__."

     The woman, h__5__, said no.

     "Well, why don't you give tomatoes to a nice dog like m__6__?" the blind man asked.

     "Dogs do not e__7__ tomatoes!"

     "And if it does?"

     "If it does, I will give you what you want." The woman then g__8__ a tomato to the blind man and

said, "Come on. Give it to the dog."

     The blind man knew that his dog would eat any f__9__. The dog always eats what the man gives.

Then that was the woman saw: the dog ate the tomato and it looked up and hoped to get m_10__. Of

course, they got what they wanted at last.

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