According to the usage on the site of wenchuan m ( subscript s ) 8.0 earthquake , the safeguard measures were put forward to assure the safe and effective operation of the system .
并根据该系统在汶川8.0级特大地震的使用情况,提出了保证系统安全有效运行应考虑保障措施建议。
A new method based on the color-fading reaction of crystal violet with no ( superscript - subscript 2 ) in dilute hydrochloric acid for determination of trace nitrite was established .
基于稀盐酸介质中,亚硝酸根与结晶紫的褪色反应,建立了测定痕量亚硝酸根的新方法。
Based on the data of heavy metals in the surface sediments from three rivers in chengdu , including the shahe river , fuhe river and nanhe river , the index of geoaccumulation ( I ( subscript geo ) ) is used to evaluate heavy metals pollution .