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- A method was established for determining two intermediates in synthesis of imidacloprid,2 chloro 5 methyl pyridine and 2 chloro 5 chloromethyl pyridine by HPLC. 建立了用高效液相色谱法同时测定农药吡虫啉中间体2-氯-5-甲基吡啶和2-氯-5-氯甲基吡啶含量的方法。
- Keywords fluoroaniline;acetylation;2 chloro 4 fluoroaniline;chlorination; 氟苯胺;乙酰化反应;4氟2氯苯胺;氯代;
- Synthesis of 2 Chloro 3 Methyl 4 (2,2,2 Trifluoro) ethoxypyridine N Oxide 刘鹰翔, 氯代-3-甲基-4-三氟乙氧基吡啶N-氧化物的合成
- Keywords dichloronitrobenzene;2 chloro 4 fluoronitrobenzene;4 chloro 2 fluoronitrobenzene;fluorization;gas chromatographic analysis; 二氯硝基苯;2-氯-4-氟硝基苯;4-氯-2-氟硝基苯;氟代;气相色谱分析;
- Will 2,000 dozens be enough for selling? 两千打够卖吗？
- The counselor bilked his clients out of$2 million. 那位顾问从他的顾客那里骗取了200万美元。
- Every afternoon the baby takes a nap for 2 hours. 每天下午宝宝都要睡两个小时。
- He added 2 gallons of fuel to his car. 他给汽车加了2加仑油。
- She demonstrated that 2 and 2 are four. 她证明2加2等于四。
- If you subtract 2 from 8, you get 6. 8减去2是6。
- The book will run to nearly 2,000 pages. 这本书将厚达两千页之多。
- The bridge is almost 2 kilometers long. 这座桥差不多有两公里长。
- The diameter of the tree-trunk is about 2 meters. 这树干的直径大约是2米。
- This fossil may be over 2 million years old. 这化石可能超过二百万年了。
- The bridge is almost 2 kilometres long. 这座桥差不多有两公里长。
- The doors were numbered 2,4, 6 and 8. 这些门编为2、 4、 6、 8号。
- A lamb with 2 tails is a freak of nature. 有两条尾巴的小羊是畸形的。
- He condensed his report from 2,000 words to 1,000. 他将报告从两千字压缩到一千字。
- I couldn't manage 2 weeks' holiday this year. 今年我不能安排两周的假期。
- We can win the rubber 2 games to nil or 2-1. 我们可以以2比零或2比1赢得这三局两胜的比赛。
