Objective To study the catalytic activity of potassium bisulfate in synthesizing hexyl hexanoate.目的研究硫酸氢钾在合成己酸己酯工艺中的催化性能.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合...
Was there a glint of mockery in his eyes?他的眼里是不是闪过一丝讥讽？The debate was a mockery. A big yawn.这场辩论实在可笑。简直是无聊透顶。The present system is a mockery of justice.现存体制是对司法的嘲讽。...