毎日1問、正解者には5つの富が報酬として与えられ、参加すると2つの富がもらえます；第294題
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選択：輸送および保管の過程で、モノマーには必ず（ ）を加えなければならないため、重合前にこれを除去しなければならない。 A、開始剤 B、分子量調節剤 C、重合抑制剤 D、鎖移動剤 C、重合抑制剤
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