...a sweetish smell of ether and iodine.乙醚和碘酒的香甜气味Williamson reaction is one important method to prepare unsymmetric ether.Williamson反应是制备不对称醚类化合物的重要方法.One new solvent free impregnating resin based on unsaturated polyest...
The tectonic stress the Earth are mainly on the upper lithosphere.地球内部构造应力主要集中于岩石圈上层.Maginal orogeny was formed on this condition with same relative motion trend between lithosphere and asthenosphere.板缘造山主要表现为岩石圈和软流圈以基本相...