初三英语作文：黑盒测试（Black Box Testing）Water is very

　　Water is very important. It is the source of life. Everything in the world can’t live without water. The proportion of water and a person’s weight is about 70%. People can live without eating food for three days, but they will be very close to death if they don’t drink water for three days. The same goes for other creature. What’s worse, without water, everything will be stop. We can’t have power, and the world will be in the darkness. The parts of cell phone can’t be made. Then we have no way to connect with others. In a word, water is pretty significant. We need to protect it and save it.

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