what shall we use for power when all the oil in the world has used up?
power 为何不能换成energy
人气:383 ℃ 时间:2020-06-14 18:20:13
解答
Water is the source of life. Human survival needs water, our lives and the functioning of economic and social systems can not do without water, the basic material. Water (H2O) is a hydrogen and oxygen...
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