acetonitrile 乙腈 methyl cyanideacetone 不是丙酮吗?乙腈是两个C 怎么也叫acetonitrile,后面那个命名倒还清楚点,怎么大多都用前面的名字?老外怎么想的?

乙腈,为什么叫acetonitrile acetonitrile 乙腈 methyl cyanideacetone 不是丙酮吗?乙腈是两个C 怎么也叫acetonitrile,后面那个命名倒还清楚点,怎么大多都用前面的名字?老外怎么想的? 英语翻译acetonitrile was of HPLC grade from Merck (Darmstadt,Germany) Identity Theft Increase Tied to Meth Users请翻译一下:Identity Theft Increase Tied to Meth Users 英语翻译Methanol,acetonitrile,and water were of high-performance liquid chromatography (HPLC) grade (Merck,Darmstadt,Germany).求翻译 英语翻译Background:Chronic methamphetamine (meth) abuse in humans can lead to various cognitive deficits,including memory loss.We previously showed that chronic meth self-administration impairs memoryfor objects relative to their location and sur well,it just seems to meth at you're the onethat doesn't want to be seen together in public.请大虾w帮我分析一下语法~ 1.english,meth and p.e.2.watch tv and do my homework (1、2题改为提问句）3.i like saturdays.4.i can play witn you!(改为否定句）因为马上就要开学了。 1.english,meth and p.e.2.watch tv and do my homework (1、2题改为提问句）3.i like saturdays.4.i can play witn you!(改为否定句） 英语翻译Chapter 2 Modeling with Linear ProgrammingChapter 3 The Simplex Method and Sensitivity AnalysisChapter 4 Duality and Post-Optimal Analysis 5.4 The Assignment Model 5.4.1 The Hungarian Method 5.4.2 Simplex Explanation of the Hungarian Meth 参考文献的格式问题“ Int.J.Num.Meth.Eng.,1971,3:519-528”都是什么意思 下附整条参考文献.O C Zienkiewicz,D V Phillips.An automatic mesh generation scheme for plane and curved surface by isoparametric coordinates[J].Int. 英语翻译1.Find or draw pictures of kites that show different shapes.Choose shapes that could be made with the fabric availvable,indecate actual sizes.Where possible explain the construction techniques used and the materials used.2.Describe 2 meth 英语翻译1you germans make good stuff 这个是美国笑话2.meth is one hell of a drug3.I'm on shrooms都是直接翻译标题,这是我和一个老美聊天时他说的句子，不怎么懂 My father often goes to Beijing by t_______ There are five yellow stars on our f_______ Look!Here is a nice birthday p_______ He is a good student.He is n_______ late for school.My grandfather likes white meth much.He a_____ wears white clothes. GRE送分出不去2012年人,有没有出现：We are unable to process your order with the payment informationGRE填完出现：We are unable to process your order with the payment information you provided.To try again using a different payment meth 乙腈 甲醇 极性哪个大 乙腈,甲醇会不会致畸?很急! 乙腈 丙烯腈是什么?用在哪方面?