简要介绍以此类方法对合成苯甲醛的研究.Based on the reactions , this paper reports research for synthesizing benzaldehyde.再溴代得到2-溴 -4,5-二甲氧基苯甲醛,收率为91.9%,并分析溴代过程中甲酰基的邻位效应及溴代产物的稳定性.This product with Br 2 was obtained 2 - bromo - 4,5 - hydroxy...
I felt so strange on the steroid injections. I was as high as a kite some of the time.注射类固醇后我感觉很奇特。我有时会极度兴奋。He lists three types of steroid sex hormones that function in mammals.他列举在哺乳动物中起作用的三种类固醇性激素.These patients, howe...
战后的伊拉克境内,铀只是诸多危害物中的冰山一角.Uranium is just one of several hazards in postwar Iraq.结论进口棕榈液油危害物检验重点在一定时期内应放在重金属和化学毒物两个方面.Conclusion There are two factors about importing RBD palm oil, heavy metal pollution and chemical hazard...
His hobby is building replicas of cars.他的爱好是制作汽车的复制品.The replicas are made by using a thin film of fusible alloy on a stiffening platen.复制是用附着在加强托板上的可熔合金薄膜实现的.It's filled with animal replicas ranging from deer to gi...