매일 한 문제, 정답자에게 5개의 부를 지급하며, 참가 시 2개의 부를 지급합니다；제305문 [
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선택: “활성 중합체”를 얻으려면 단량체는 ( ) 기작에 따라 중합되어야 합니다. A、자유라디칼 B、양이온 C、음이온 D、위치결합 중합 C、음이온
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