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환경보호 매일 한 장, 4.17 참여 보상 5정답 시 추가 보상

2016-04-17View Original

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단일 선택 문제: 산성비란 pH 값이 ( )인 대기 중의 습성 강수를 말하며, 비, 눈, 이슬 등을 포함합니다.A、>5.6 ; B、>7 ; C、<5.6; D、<7 ; C
Reply #22016-04-17
산성비란 pH 값이 5.6 미만인 대기 중의 습성 강수물을 말하며, 비, 눈, 이슬 등이 포함됩니다.
Reply #32016-04-17
산성비란 pH 값이 5.6 미만인 대기 중의 습성강우로, 비, 눈, 이슬 등을 포함합니다.
Reply #42016-04-17
C...........

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