某些化学含义可用特定的符号来表示.下列符号表示正确的是a2个氮分子 2nb2个碳酸根离子 c在氧化铝中铝的化合价为 3价 D4 Template




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tomski某些化学含义可用特定的符号来表示.下列符号表示正确的是a2个氮分子 2nb2个碳酸根离子 c在氧化铝中铝的化合价为 coloring