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환경보호 매일 한 장, 10.01 참여 보상 3, 정답 시 추가로 5 지급

2016-10-01View Original

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단일 선택 문제: “남극 오존 구멍”에 대한 올바른 설명은 무엇인가? ( ) A. 남극 지역에는 더 이상 오존이 존재하지 않는다는 것. B. 대류권에서 발생한다는 것. C. 전적으로 인위적인 원인으로 인해 생긴다는 것. D. 그 크기는 계절에 따라 변한다는 것. D

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