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Many places in the world need more fresh...

Many places in the world need more fresh water(淡水). Every country is trying to find ways to turn salt water into fresh.

Why aren't there many factories like the Symi factory?

In some places, the sun isn't hot enough, or it doesn't shine every day. In these places other ways to heating(加热) sea water can be used. These ways cost more money, but they work faster than the sun. By boiling(煮沸) sea water with high heat,a lot of fresh water can be made quickly. But heating is not the only way to get fresh water from salt water. Other ways are tried. One way is freezing(冷冻). The fresh part of salt water freezes first. To get fresh water, the pieces of ice are taken out.

Which way is best? The one that gives the most water for the least money. It may be a different way for each place.

Symi's way seems very good for small, hot places. It doesn't make very much water at a time. But the factory is easy to build and cost little.

1.From the passage we know that fresh water .

A. is needed in many countries B. is needed in every country

C. can be used in many ways  D. is very important for factories

2. The Symi factory .

A. is a fresh water factory

B. can be built everywhere

C. can make much fresh water at a time

D. doesn't need sunshine every day

3. Which is the best way for small and hot places to get fresh water?

A. Boiling or heating the sea water.

B. The way in sunny places.

C. The Symi's way.

D. Freezing the sea water in cold places.

4. The writer is mainly talking about .

A. water making factories in different countries

B. the ways of making fresh water from sea water

C. hot places and dry places

D. how to make good use of the sunlight

5. Which of the following isn't true?

A. New ways are tried to get fresh water.

B. A lot of fresh water can be made quickly by heating.

C. The best way is to get the most fresh water with the least money.

D. The Symi's way doesn't work in dry places.

 

1.B 2.A 3.C 4.D 5.C 【解析】 试题分析:这篇短文主要介绍了世界上许多的地方都需要更多的淡水,每个国家都在设法找把盐水变成淡水的方法。当然人们希望花费最少的钱获得最多的淡水。 1.根据Many places in the world need more fresh water. Every country is trying to find ways to turn salt water into fresh.可知淡水在每个国家都很重要.故选B. 2.根据Symi's way seems very good for small, hot places. It does not make much water at a time. But the factory is easy to build and costs little.描述,可知这种工厂能将盐水变成淡水.故选A 3.根据The one that gives the most water for the least money. I 及下文Symi's way seems very good for small, hot places. It does not make much water at a time. But the factory is easy to build and costs little.描述,可知选C. 4.根据短文第二段描述,可知在一些炎热的小地方获取淡水的最好方法是冷冻海水,故选D. 5.根据Symi's way seems very good for small, hot places.描述,可知这不适合凉爽的地区,故选C. 考点:科普类短文阅读。
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