【单选题】Teacher: After listening, answer the following two questions according to what you have heard on the tape. (1) What is the relationship between the speakers? (2) What are the speakers‘ attitudes towar...
B.
Listening for the gist.
C.
Listening for details.
【简答题】根据分子组成特点和极性基团的解离性质,将表面活性剂分为 、 。根据离子表面活性剂所带电荷,可分为 、 和两性离子表面活性剂三种
【判断题】孔子通过自身的努力使儒家从一种职业变成了一个学派。()
【简答题】根据分子组成特点和极性基团的解离性质,将表面活性剂分为 ( ) 和 ( ). 根据离子表面活性剂所带电荷,可分为 ( ) 、 ( ) 、 ( ).
【单选题】Teacher: After listening, ansu,er the following two questions according to what you haveheard from the tape. (1) What is the relationship between the speakers? (2) What are the speakers‘ attitudes tow...
B.
Listening for the gist.
C.
Listening for details.
【简答题】根据分子组成特点和极性基团的解离性质,将表面活性剂分为____和____。