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wu li jie neng huan bao lei xuan ze ti shang xi
Pages: 30-31
Year: Issue:  3
Journal: Required Reading for Junior Middle School Students

Abstract: <正>大力约型发展社会循环,是经当济今,社建会设发节展的必然趋势.在近年的物理中考题中,常涉及到以节能、环保为主题的考题.现举几例进行分析.例1盛夏季节,正值用电高峰.某市电力供应紧
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