Glyoxylic acid was rapidly synthesized by catalytic oxidation of glyoxal with H 2 O 2.在催化剂存在下,用双氧水氧化乙二醛溶液快速合成了乙醛酸.Glyoxal is prepared with waste liquid propellant HNO 3 - 27 S and ethanal.利用报废的液体推进剂硝酸-27S和乙醛制备乙二醛.There a...
It's been billed as the race of the year.海报上宣传这是本年度的大赛.The new actor was billed for this week.这位新演员已贴出海报,本周登台献艺.The businessman was billed for delinquent taxes.那商人因拖欠税金而被罚款....