The disadvantages of the pharos and avigation obstacle lights are analysed in the paper.详细分析目前航标灯和航空障碍灯存在的主要问题.Third, the internet cafe has a lot of disadvantages to us, as too many people.第三, 网吧对于我们有许多不好因素, 比如人口杂乱.Many ...
This is a generally known method for obtaining phenylnitromethane from benzyl cyanide.从苯乙腈制取苯基硝基甲烷就用这个方法.Benzyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,丁酸和苄醇为原料合成丁酸苄酯.DNA filamento...
People are beginning to question the old dogmas.人们开始质疑旧的信条.Religious dogmas often include strong sexual taboos and can create in children the impression that sex is sinful.宗教教义中经常包含严格的性禁忌，这会给儿童留下“性是罪恶”的印象。Dogmas are at t...