The separation of acetone, ethanol, benzene, chloroform, toluene was performed on a 10 % PEG - 20 M Chromosorb - W - AW - DMCS column.对样品中残留丙酮 、 乙醇 、 苯 、 氯仿 、 甲苯的分离选用10%PEG-20Mchromosorb -W-AW-DMCS 公谱柱.With the column ov...
友情是理解，不是妥协；是原谅，不是遗忘。即使不联系，感情依然在。Friendship means understanding, not agreement. It means forgiveness, not forgetting.It means the memories last, even if contact is lost.高等教育被迫向市场需求妥协。Higher education is being forced to pr...
对疼痛的忍耐力降低了，对感染的抵抗力也减弱了。There is lowered pain tolerance, lowered resistance to infection.这些猴子已经注射了由受感染的细胞培养而成的疫苗。The monkeys had been immunized with a vaccine made from infected cells.并不存在儿童受到感染的切实危险。There was never any r...
The cogs gear smoothly.齿轮啮合得很好.These executives, expert in every phase of corporation, became the indispensable cogs in the industrial machine.这些高层管理人员精通公司的各项业务, 成为整个工业机器中不可缺少的齿轮.Today's young people are being forge...
Anaphylactic and anaphylactoid reactions can be associated with bronchospasm and pulmonary edema.过敏及类过敏反应,可导致支气管痉挛及肺水肿.What is the difference between anaphylactic and anaphylactoid reactions?过敏反应与类过敏反应的区别?Can you give so...