A method for the determination of micro amounts of vanadium in ferrochromium was presented.用催化动力学示波极谱法测定铬铁中微量钒.Objective To explore the determination method of Vanadium content in cassia seed.目的探讨富钒决明子芽中钒含量的测定方法.Vanadium...
R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.蒸馏得质量分数高于98%的邻乙氧基苯甲酸,收率为92%.Distillation gave o ethoxybenzoic acid with 98 % of the p...
His car was raked with fire from automatic weapons.他的车遭到自动武器火力的扫射。They shoot off their weapons as a sign of victory.他们对空放枪象徵胜利.He has said he will use all the weapons at his disposal...他放出话说他将使出十八般武艺。At no time and in no...