用化学符号或名称填空:
(1)N________
(2)Ca2+____________;
(3)铵根离子______;
(4)氧化铁________
(5)3个二氧化碳分子________
(6)NaNO3________;
用化学符号或名称填空:
(1)N________
(2)Ca2+____________;
(3)铵根离子______;
(4)氧化铁________
(5)3个二氧化碳分子________
(6)NaNO3________;
试题篮
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