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...
He is more highly educated, with a PhD in Chemistry.他受过更高的教育，拥有化学博士学位。She's working towards her PhD.她在攻读博士学位.He was awarded his PhD for a thesis on industrial robots.他凭一篇研究工业机器人的论文获得博士学位。...
They all set off in their best bibs and tucher.他们穿得漂漂亮亮的,出发去了.BIBS curriculum focuses on strengthening students'skills in a variety of areas.青苗的课程设置注重发展学生在不同领域的不同技能.But what? Bibs? Socks?但是什么 呢 ?小孩的围裙? 短袜?...
三角星形线的两条互相垂直的法线的交点在哪里?Construct two mutually orthogonal tangents of the deltoid. Where do they meet?2三角星形线的两条互相垂直的切线的交点在哪里?Construct the part of the tangent of the deltoid intercepted by the curve....
Be heir to those who are now exanimate.那慈声归入了音乐华严的天国./让你的嘴来承继那寂灭的清音.Vitamin B 5 can increase the inherit tenacity of the hair and fully reactivate the exanimate hair.维他命原B5能够加强头发的内在韧性,使原来缺乏生气的头发显得活力十足....
除股价上升之外还有无形利益。There are intangible benefits beyond a rise in the share price.关节炎的新疗法可能是止痛药之外的另一种选择。New ways to treat arthritis may provide an alternative to painkillers.把手位于车门之外。The handles stand proud of the doors of th...