问题
填空题
表面活性剂根据其溶解性可分为（），根据其来源分为（）表面活性剂。
答案
参考答案：水溶性表面活性剂和油溶性表面活性剂；天然和合成
搜题请搜索小程序“爱下问搜题”
表面活性剂根据其溶解性可分为（），根据其来源分为（）表面活性剂。
参考答案：水溶性表面活性剂和油溶性表面活性剂；天然和合成
| 选词填空，用所给词的适当形式填空，注意词形的变化。 | |
 n a middle school. He teaches English there. Her 3 stays at home. She is very nice. Kate 4 a beautiful room. Look! Her bed is 5 the wall. The picture is on the wall. Her dresser is 6 . She likes white very much. Oh, a tennis racket is 7 the sofa. Kate 8 tennis. She often plays tennis after 9 . Kate has a 10 family. |