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化学学习小组复习元素及其化合物知识以后，交流自已的学习体会，以下是四位同学的发言，其中有错误的是

(A)碳能形成多种单质，如：金刚石、石墨、C₆₀等。碳具有还原性，用焦炭可冶炼铁

(B)SO₃、CO₂、CO是非金属氧化物，都可用NaOH溶液吸收

(C)铁是化学性质比较活泼的金属，除与氧气反应外，还能与某些酸和盐溶液发生置换反应

(D)C、CO、CH₄、C₂H₅OH均能作为燃料使用