In the reaction of acetylation and nitration 1,2 ? dichloroethane was used as solvent.在乙酰化、硝化反应中引入了1,2-二氯乙烷溶剂.Dichloroethane can be converted to VCM.二氯乙烷被转化为氯乙烯.Objective : To investigate the CT and MRI features of Subac...
GEOCENTRIC MAPS MOVEMENTS from low prices on Coffee.从咖啡价格低点起地心天图的运动.The orbits of planets in the once popular geocentric Ptolemaic system are epitrochoids.曾经盛行的托勒密地心说体系里的行星轨道就是外旋轮线.Accuracy of the measurements of the geo...
遇有危险，食蚁兽会迅速用尾巴卷住树枝。When in danger, the anteater lashes its tail round a branch.结果, 新生的食蚁兽幼兽往往被它的父母遗弃.As a consequence, newborn baby anteaters are often discarded by their parents.同伴被吃了怎么办?杀进食蚁兽的肚子里!Find out the fastest w...
Nick's head bent slowly over hers until their mouths met.尼克慢慢向她低下头去，直到他们的嘴唇碰在了一起。He made mouths at his mother and then ran out.他冲他妈妈做完鬼脸之后就跑出去了.Small alluvial fans at mouths of wet weather drainage ways also are com...
All the other wavelengths will emerge as either elliptically or circularly polarized light.所有其它波长的光将以椭圆偏振光或圆偏振光出射.The transforms of disks and rings and the like will obviously be circularly symmetric.圆盘和圆环等的变换式显然将是圆形对称的....