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환경 보호 매일 한 문제 (12.23)

2016-12-23View Original

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단일 선택문제: 기포의 직경이 작을수록 상승 속도는 더 빨라지며, 흡착된 이물질과의 접촉 시간도 줄어들어 기포 부상법의 효과가 향상됩니다.A. 느리고. 짧음 B. 빠르고. 짧음 C. 빠르고. 길음 D. 느리고. 길음 선택: D

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