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【毎日一題】深加工20160525 選択問題 合成樹脂の原料には、一般的に一定量の酸化防止剤が含まれている……

2016-05-25View Original

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合成樹脂の原料には、一般的に一定量の酸化防止剤が含まれており、その目的は()です。A. 保存しやすくするため B. 量を増やすため C. コストを削減するため D. 反応を促進するため 答え:A、保存しやすくするため
Reply #22016-05-25
A.............

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