Passage 2

　　Many places in the world need more fresh(淡的)water. Every country is trying to find ways to turn salt water into fresh. Why arent there many factorres like the Symi factory? In some places, the sunis not hot enough. Or it does not shine every day. In such places, other ways of heating (加热)﹕seawater can be used.These ways cost more money,but tehy work faster then the sun.By boiling (煮沸);sea water with high heat, a lot of fresh watercan be made quickly. But heating is not the only way toget fresh water from salt water. other ways are tried. One way is freezing (冷冻).The fresh part ofsalt water freezes first.To get fresh water, the bits of ice are taken out. Which way is best? The onethat gives the nost water for the least money. It may be a different way for each place. Symis way seems very good for small, hot places. It does not make very much water at a time. But the factory is easy to build and costs little.That is why people in many dry places talk about Symi!

　　1. From this passage(短文)we know that fresh water_______.

　　A. is needed in every country

　　B. can be found in many factories

　　C. can be used in many ways

　　D. is very important for factories

　　2. What is the writer mainly (主要的) talking about in the passage?

　　A. Water-making factories in different countries

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