Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.One advisable way is to synthesize NFM acylating morpholine...
The extremists prevailed, and the security minister was canned...极端主义分子猖獗,致使安全部长被解职。There have been scores of kidnappings by political extremists in the past year.去年就有政治上极端分子所作的很多起绑架案.Many extremists decided to end the b...
石墨层中的碳原子相互连接形成碳环。In graphite sheets, carbon atoms bond together in rings.碳化合物氧化后必然会产生二氧化碳。Carbon dioxide is a necessary result of the oxidation of carbon compounds.食物由碳水化合物、蛋白质和脂肪构成。Food is made up of carbohydrates, prot...