【多选题】关于表面活性剂下列说法正确的是( )
A.
疏水基的支链化对去污性能有显著影响 , 一般随着支链化程度的提高,去污能力明显下降,但可以提高表面活性剂的润湿能力。
B.
洗涤剂中要求表面活性剂的亲油基和亲水基要保持相对平衡。
C.
一般来说,表面活性剂的碳链越长,洗后织物的手感越好。
D.
在洗涤剂配方中多采用阴离子表面活性剂和非离子表面活性剂。
【单选题】He ’ s always had a for books. If he would work in a library, it would be a dream come true.
【单选题】_________ he wasasked why he was late for class, he would answer carelessly, always the samething.
【单选题】When Watson enrolled at Brown University in 2009, she couldn’t decide whether to quit acting and go back to campus life temporarily.
【判断题】When Rob went to milk the cow alone, he expected that he would have no trouble at all.
【简答题】And not to say he would have imagined ( 9 ) Mount Kilimanjaro.