在搜集了有關情況后，他們說照片是偽造的。They said, after digging around, the photo was a fake.威廉斯插入了許多偽造的素材。Williams interpolated much spurious matter.你覺察到這些鈔票是偽造的嗎？Are you aware these notes are counterfeit?...
本文論述了利用混合溶劑——結晶法提純除蟲脲的分析技術.The method was established for purification of diflubenzuron by crystal technique with mixed solvents.通過反相液相色譜方法往甲醇與水的混合流動相中加入適當調節劑,分離和測定除蟲脲原藥中的主要雜質.The separation and determination of the prim...