매일 한 문제, 정답자에게는 6개의 부를 지급하며, 참가자에게는 2개의 부를 지급합니다;제459문제
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다지선다형 문제: 산업계에서 말하는 “삼산이알칼리”에 일반적으로 포함되지 않는 것은 ( ). A、황산 B、인산 C、수산화나트륨 D、황화칼륨 답변: BD삼산은 황산, 염산, *ao산입니다.
이알칼리는 탄산나트륨, 수산화나트륨입니다
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