以苯胺和溴乙烷为原料,用四乙基氢氧化铵作相转移催化剂,在常压下合成N, N二乙基苯胺.N, N - diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst.利用β-环糊精-1,2-二溴乙烷乙醇混合体系作增敏剂首次提出了用荧光光度法测量阿苯达唑含量的方法.A fl...
Last year, he mailed the documents to French journalists.他去年把这些文件寄给了法国记者。One of the journalists queried whether sabotage could have been involved.其中一位新闻记者询问是否有人为破坏的可能性。One group of journalists were crowded into a minibus...