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환경보호 매일 한 장, 10.09 참여 보상 3, 정답 시 추가로 5 지급

2016-10-09View Original

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단일 선택 문제: 오존층을 파괴하는 주요 오염원은 무엇인가?A. 공장과 가정용 난로에서는 광물 에너지가 연소됩니다..B. 자동차 배기가스.。.C. 비철금속 제련 산업의 배기가스..D. 산업 및 가정에서 널리 사용되는 냉장고와 에어컨에서 배출되는 프레온 화합물.D

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