空氣中有那些成份? - 社會議題
By Cara
at 2005-10-07T00:00
at 2005-10-07T00:00
Table of Contents
空氣中有那些成份?
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社會議題
All Comments
By Kristin
at 2005-10-09T10:42
at 2005-10-09T10:42
By Delia
at 2005-10-09T01:16
at 2005-10-09T01:16
其次是氧氣,約佔20% 再次之是氬氣約1%
還有其他微量氣體
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