2016-12-16 判定問題
Thread Content
中変触媒は使用前はFe3O4の状態にあり、活性を持つためにはFe2O3に変換されなければならない。誤り
中変触媒は使用前はFe3O4の形で存在し、活性を持つためにはFe2O3に変換されなければならない。（x）
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