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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譜法同時(shí)測定農藥吡蟲(chóng)啉中間體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?；磻?4氟2氯苯胺;氯代;
- Synthesis of 2 Chloro 3 Methyl 4 (2,2,2 Trifluoro) ethoxypyridine N Oxide 劉鷹翔, 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;氣相色譜分析;
- Will 2,000 dozens be enough for selling? 兩千打夠賣(mài)嗎？
- The counselor bilked his clients out of$2 million. 那位顧問(wèn)從他的顧客那里騙取了200萬(wàn)美元。
- Every afternoon the baby takes a nap for 2 hours. 每天下午寶寶都要睡兩個(gè)小時(shí)。
- He added 2 gallons of fuel to his car. 他給汽車(chē)加了2加侖油。
- She demonstrated that 2 and 2 are four. 她證明2加2等于四。
- If you subtract 2 from 8, you get 6. 8減去2是6。
- The book will run to nearly 2,000 pages. 這本書(shū)將厚達兩千頁(yè)之多。
- The bridge is almost 2 kilometers long. 這座橋差不多有兩公里長(cháng)。
- The diameter of the tree-trunk is about 2 meters. 這樹(shù)干的直徑大約是2米。
- This fossil may be over 2 million years old. 這化石可能超過(guò)二百萬(wàn)年了。
- The bridge is almost 2 kilometres long. 這座橋差不多有兩公里長(cháng)。
- The doors were numbered 2,4, 6 and 8. 這些門(mén)編為2、 4、 6、 8號。
- A lamb with 2 tails is a freak of nature. 有兩條尾巴的小羊是畸形的。
- He condensed his report from 2,000 words to 1,000. 他將報告從兩千字壓縮到一千字。
- I couldn't manage 2 weeks' holiday this year. 今年我不能安排兩周的假期。
- We can win the rubber 2 games to nil or 2-1. 我們可以以2比零或2比1贏(yíng)得這三局兩勝的比賽。
