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如何保持我们的城市清洁建立合作伙伴关系

如何保持我们的城市. 我们是穆斯林,我们应该遵循伊斯兰教义. 伊斯兰教为我们提供纯度cleanliness.We的意义,因此应该在行动和思想干净. 我们的先知 (愿他安息) 爱清洁, 我们应该感到跟随他的脚步而自豪. In Advanced countries even today people dust their houses and its surroundings ...

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同系列和同系列的特点

Homologous series and characteristics of homologous series Definition; Series of organic compounds which have same functional group, similar structural feature but differ from each other by integer number of CH2(methylene group) is called "同系列". The number of homologous series differs by molecular mass 14. Characteristics of Homologous series: 1. All numbers of homologous series have similar structures. 2. Physical ...

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