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.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸高铈为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl butyrate was synthesized by using ceric sulfate as the catalyst.以硫酸铈铵为催化剂,...
然后把加热器吻合地安装在罩壳内.Anastomosis then heater installed in the Shell.对透明塑料罩壳注射模结构, 采用点浇口进料.For the injection mold structure of transparent plastic cover shell, point gate feeding is adopted....
无疑,这种光合作用的总的化学计量学中,包含有许多不同的反应.Undoubtedly many different reactions contributed to the overall stoichiometry of photosynthesis.本文从多方面研究了电容规的 计量学 特性.The metrological characteristics of the capacitance diaphragm gauge ( CDG...
Dates, cranberries and red grapes have high concentrations of antioxidants, he said.枣子 、 蔓越苺和红葡萄的抗氧化剂含量很高, 他说.BHT and BHA + BHT ( 1:1 ) are higher anti - oxidation abilities of CLA than other antioxidants.抗氧化剂BHT、 BHA+BH...
His mother's voice was one he knew; ice cold and deadly.母亲的声音是他很熟悉的:冰冷、无情。Broadcast news was accurate and reliable but deadly dull.新闻广播准确可靠但却非常枯燥。She took the gun and blazed away with calm and deadly accuracy.她拿起枪,冷...
The scale of the problem is now universally recognised.现在全世界的人都已认识到了这个问题的严重性。Nor is acid rain always, and universally, a bad thing.酸雨也并非在任何情况下都是坏事。to be universally accepted得到普遍接受...
A recursive prediction error algorithm which converges fast is applied to tra.采用了收敛速度较快的递推预报误差算法训练神经网络.ACM on the subject of transport! Main uses recursive algorithm! Reference value!这是一道ACM的关于交通运输的题目! 主要用到了递归算法! 有参考价值!A...