【简答题】一类在水溶液中不电离出比任何形式的离子,亲水基主要由具有一定数量的含氧基团构成亲水性,靠与形成氢键实现溶解的表面活性剂叫做A. 非离子表面活性剂
【单选题】Who were the subjects of the IBD study?
B.
Prominent politicians.
D.
Successful businessmen.
【单选题】Tom was the only one of the students who ________ named Outstanding Student. A. is B. are C. was D. were
【多选题】Who were outstanding water-taming figures?
【判断题】本实验中用移液管移弃溶液时,可用待测液 润洗了移液管。