P - methoxybenzeneacetonitrile was prepared in 34.8 % yield starting from anisole, via chloromethylation, cyanogenation and fractional distillation.以苯甲醚为原料,经过氯甲基化, 氰化反应后, 通过精馏获得对甲氧基苯乙腈,总收率为34.8%....
公园北依九盘山、南濒青衣江.North Park, according to nine Panshan near the South Qingyi Jiang.南濒滇池, 三面环山.South dianchi lake, three sides.本文研究了其生态生物学特性,并初步探讨其致濒原因及解决方法.To explore causes and solution to the problem, its ecological and b...
SIG is now the vice - President a Korean triathlon association.他是副总裁铁人三项联合会.Triathlon begins with swimming, followed by cycling and running.铁人三项开始是游泳, 然后是自行车和赛跑.A triathlon combines three events – running, swimming and b...
The curio shop backs the post office.古玩店位于邮局的后面.This set of glass curio was made with the latest technology.这套玻璃古玩是用最新工艺制作的.There was a silence then that filled the little curio shop.接着这个小古董店变得一片寂静....
He complained of an earache.他主诉有耳痛。Blowing your nose too hard can cause earache.擤鼻涕太用力会造成耳痛。The disease can also cause a build up of pressure in the inner ear leading to severe earache.该疾病还会引起内耳的压力增加，从而导致剧烈的耳痛。...
鸣 二十一 响礼炮庆祝女王的生日.The Queen's birthday was honoured by a 21 - gun salute.她与其他十一位陪审员一起宣誓就职.She was sworn in, along with eleven other jurors.有十一辆车在高速公路上相撞.Eleven cars were involved in a pileup on the motorway....