水中病毒来源及处理 水中病毒来源及处理 Source
Viruses are infectious organisms that range in size from 10 to 25 nanometers [1 nanometer one billionth (10-9) of a meter]. They are particles composed of an acidic nucleus surrounded by a protein shell. Viruses depend totally on living cells and lack an independent metabolism. Th…… http://www.samsco.com.cn/info/355.htm