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最佳答案：This branch of physics involved in the action of solid、liquid and gas.
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最佳答案：Due to over explotation by humans and the discharge of large amount of greenhous
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最佳答案：Masks can effectively protect us from serious air pollution,it can filter outres
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最佳答案：郁闷,刚刚写了一篇,现在都不见了,那就简单写一下了.Various pressure vessels whose maximum operating press
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最佳答案：1, As long as it stopped raining, we should start off right now.2, We should com
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最佳答案：it can decrease greenhouse gases.We shouldn't left the light on when we are away
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最佳答案：Fluid is a fixed quality without fixed shape of objects,such as gas or liquid.Fl
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最佳答案：The people more and more realize the development environmental protection produc
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最佳答案：1 periodic table of elements and their compound by law degeneration1.1 Atomic ra
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最佳答案：Life is a kind of lamp lighting the air purifier and oxygen bar, can effectively