The production methods of N, N - dimethylaniline including liquid - phase and gas - phase method are introduced.介绍了N, N- 二甲基苯胺的两种生产方法 —— 液相法和气相法,综述了N, N-二甲基苯胺国内外生产工艺进展.A HPLC method with electrochemical detector for dete...
Early astronomers thought that our planet was the centre of the universe.早期的天文学家认为我们的星球是宇宙的中心。Space scientists and astronomers have taken another step forwards.航天科学家和天文学家又取得了进展。Astronomers used to ask why only Saturn has...
Debray stepped forward , and cordially pressed the hand of his interlocutor.德布雷走上来热情地和对方握手.She greeted the visitor cordially,inviting her to stay for breakfast.她亲切地招呼着客人,请她留下来吃早饭。He extended his hand cordially for handsh...
The degree provides a thorough grounding in both mathematics and statistics.该学位课程将为数学和统计学打下扎实的基础。This degree programme is fully accredited by the Institution of Electrical Engineers.这门学位课程经电气工程师学院鉴定完全合格。The psychiatrist ...