科研之友
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摘要
<正>Pure water has no taste and smell.All living things need water in order to live.40-90% of the weight of all organisms(生物体) is water.The human body uses water to remove wastes and carry nutrients throughout the body.In the late eighteenth century a British chemist named Cavendish made water by using hydrogen(氢)and oxygen(氧).We now know that water is 2 parts hydrogen and 1 part oxygen.
