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환경보호 매일 한 장, 10.14 참여 보상 3, 정답 시 추가로 5 지급

2016-10-14View Original

Thread Content

단일 선택 문제: 인류가 비교적 쉽게 활용할 수 있는 담수 자원은 무엇인가? ( )
A. 강물, 얕은 지하수, 깊은 지하수
B. 강물, 빙하수, 얕은 지하수
C. 강물, 얕은 지하수, 담수호의 물
D. 빙하수, 얕은 지하수, 담수호의 물 c
Reply #22016-10-14
강물, 얕은 지하수, 담수호 물
Reply #32016-10-14
강물, 얕은 지하수, 담수호 물

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