They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions. 它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.
Analogue computers are generalpurpose devices which employ laws of physics for performing mathematical operations.模拟计算机是用物理定律进行数学运算的通用装置。With respect to analogue data ; to place it in digital form.将模拟量数据转换成数字形式.Two villa...
Luke answered by tightening his grip on her shoulder.卢克的回应就是把她的肩头抓得更紧了。The new measures are aimed at tightening existing sanctions.新措施旨在加强现行的制裁。The troops are tightening their stranglehold on the city.部队正在加强对该市的控制。...
The inner layer of the cortex differentiates into the endodermis.皮层的内层分化为内皮层.Phellem layer can do cork, endodermis can do dye.木栓层可做软木塞, 内皮可做染料.The primary root is tetrarch , and endodermis with casparian strip is obvious...
Objective: to evaluate resistance as an adjunctive therapy in treating hypertension complications.目的: 抵抗力辅助疗法对高血压并发症的效果分析.Objective To probe the nursing methods of treating tubal pregnancy by operation un - der laparosco...