化学符号与符号的意义表示正确的是a.2co2 2个二氧化碳b.nh4cl 氯化氨c.2o 2个氧原子d.feso4 硫酸铁 题目和参考答案 Template




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tomski化学符号与符号的意义表示正确的是a.2co2 2个二氧化碳b.nh4cl 氯化氨c.2o coloring