Persistent Organic Pollutants,简称POPs,指的是:()。
Electric insulation is made of organic substances and so gradually () with age.
It is that reduce the BOD by converting the organic content of the sewage to a chemically and organically inert sludge()
As time goes on the organic material is buried deeper and hence()higher temperatures and pressures.
Electric insulation is made of organic substances and so gradually () with age.
生物礁(organic reef)
土壤有机持分解率 decomposition rate of soil organic matter
下面哪个环境是最合适的对于OPC(organic photo-conducting)drums?()
使用读秀图书搜索(http://www.duxiu.com/),查找2009年出版的书名中有“organic chemistry”的中文图书()。
It is that reduce the BOD by converting the organic content of the sewage to a chemically and organically inert sludge()