【简答题】A.His physical appearance and his action. B.His way of speaking and behaving. C.His learning and behaviour. D.His way of acting and thinking.
【单选题】采用双相滴定法测定苯甲酸钠含量时,加入乙醚的目的是
【单选题】食品检测和微生物学实验室中最常用的一种湿热灭菌法是(),它适用于各种耐高温而又不怕蒸汽的物品灭菌。
【简答题】假如有一邻苯二甲酸氢钾试样,其中邻苯二甲酸氢钾含量约90%,余为不与碱作用的杂质,今用酸碱滴定法测定其含量。若采用浓度为1.000mol/L NaOH标准溶液滴定,与控制滴定时碱溶液体积在25mL左右通过上述的计算结果,说明为什么在滴定分析中通常采用的滴定剂浓度为0.1~0.2mol/L。
【单选题】Where did the man see Miss Zhang?
【单选题】My uncle went to see me off. [ ]
【简答题】A.His physical appearance and his action. B.His way of speaking and behaving. C.His learning and behavior. D.His way of acting and thinking.
【单选题】He must be _________ home now.
【单选题】In addition to his intelligence, he works very hard, so he is well ____________ to becoming a fine mechanic. A. in the way B. on his way C. at the way D. by the way