Objective To study the catalytic activity of potassium bisulfate in synthesizing hexyl hexanoate.目的研究硫酸氢钾在合成己酸己酯工艺中的催化性能.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合...
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.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Ethyl lact...
To record, press these two buttons together; then rewind , and then press the red button to play back.要录音就得一起按下这两个键, 而后倒回, 按下这个红键播放.To record, press these two buttons together; then rewind, and then press the red button ...
Shawls, capes, and furs are wraps.披肩 、 斗篷和皮衣都是披在身上用的.Once production wraps on the show's seventh season, Kiefer Sutherland will return to additional 30 days.一旦《24小时》第七季结束, 他又得回到监狱度过剩下的30天.A vine wraps round a big tr...
General Rudnicki was a moral beacon for many exiled Poles.鲁德尼茨基将军是众多被放逐的波兰人精神上的引路人。Wires criss-cross between the tops of the poles, forming a grid.电线杆顶端的电线相互交错，形成电线网。Like poles repel, unlike poles attract.同极相斥，异极相吸。...
Martin rubbed his chin meditatively.马丁若有所思地摸了一下下巴。The old man looked meditatively at the darts board.老头儿沉思不语,看着那投镖板.But at this point Stane scratched his ear meditatively.不过,讲到这一点,史丹若有所思地搔搔他的耳朵....
他对于法国、德国和荷兰的文学了如指掌。He was well acquainted with the literature of France, Germany and Holland.她带领一群孩子去法国过复活节。She spends her Easter holidays taking groups of children to France.他的受审重新勾起了在战争中受苦受难的法国人民的回忆。His trial revived m...