1.稀有气体的化学性质很不活泼,但也可以与哪些物质发生反应?2.用燃着的木条如何一次性鉴别空气、氧气、氮气?3.氧气不能作燃料吗?4.造成扬沙和沙尘暴现象的主要原因是( )A.植被遭破坏
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/05 18:48:32
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