【单选题】在强碱性阴离子交换树脂上,下列阴离子的交换亲和力的顺序为
【多选题】关于离子交换色谱-紫外分光光度法测定氯贝丁酯胶囊含量,下列叙述正确的是( )
A.
采用强碱性聚苯乙烯-二乙烯型阴离子交换成树脂
B.
采用强酸性聚苯乙烯-二乙烯型阳离子交换成树脂
C.
上样后,对氯酚、对氯苯氧异丁酸等酸性杂质吸附在离子交换柱上
【判断题】One can use jargons if he is sure that the audience are familiar with the terms.
【单选题】5-23 (2) There are many skills for organizing and illustrating the idea in making a speech. Choose the one which is not the appropriate skill. A)Trying to use slang or jargons as many as you can B)Mak...
【单选题】高速公路行车带的每一个方向至少有( )个车道
【单选题】高速公路行车带的每一个方向至少有( )车道
【多选题】下列细菌代谢产物中,与致病性有关的是()