（）is the first element on the periodic table， making it the lightest element.Since it is so light， it rises in the atmosphere and is therefore rarely found in its pure form._精华吧

（）is the first element on the periodic table， making it the lightest element.Since it is so light， it rises in the atmosphere and is therefore rarely found in its pure form.

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（）is the first element on the periodic table， making it the lightest element.Since it is so light， it rises in the atmosphere and is therefore rarely found in its pure form.

A.Nitrogen

B.Oxygen

C.Carbon

D.Hydrogen

正确答案：Hydrogen

Tag：能源英语面面观时间：2023-12-21 15:06:27

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