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.Isoamyl butyrate was synthesized by using ceric sulfate 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 bu...
The progresses in the synthesis study of isoamyl isovalerate at home and abroad were reviewed.综述了国内外对异戊酸异戊酯的合成研究的进展情况.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...
A court at Tampa, Florida has convicted five officials on drugs charges.佛罗里达州坦帕市法庭判决5名官员的毒品交易罪名成立。Last year, they relocated to Tampa , where the rent is cheaper.去年他们搬到了租金较为便宜的坦帕.However, Tampa is a small, clean and tidy ...
One way to carve up a market is to identify preference segments.一种划分市场的方式是识别偏好细分市场.The ancient astronomers divided zodiac into 12 equal segments.古代天文学家把黄道带分为12等分.Plants sparsely scabrous; ultimate leaf segments irregular...
这本书提供了一些关于如何照料室内花草的有用信息。The book gives handy hints on looking after indoor plants.一位园艺专家教我们种好花草的方法.A gardening expert tells us how to grow plants well.而且,在雨里是很难栽种花草的.And it is hard to plant flowers in the rain....