问题
多项选择题
表面活性剂的性质是能够降低液体的表面张力,这一性质主要是通过表面活性剂的润湿、乳化及()等作用来体现的。
A、增溶
B、憎水
C、分散
答案
参考答案:A, C
表面活性剂的性质是能够降低液体的表面张力,这一性质主要是通过表面活性剂的润湿、乳化及()等作用来体现的。
A、增溶
B、憎水
C、分散
参考答案:A, C
Five students went out for a one-week trip in the countryside. When they returned, the group leader wrote a report about each student. _
小题1: The food was so terrible. I missed my parents so much. How comfortable when I was at home! 小题2:What a pity! Everything was going well, and then I hurt myself. The last few days were quite boring. 小题3: I love this kind of trip! I always had some new things to do and learn. It was great fun helping organize activities. 小题4:They wanted me to get out of bed very early, and be ready for the day’s activities soon. Then they got angry when I kept them waiting. 小题5:I was often very lonely. I had problems making friends. Some of the activities were dangerous. I think I made the mistake of going on this trip. |