单项选择题

氯仿和四氢呋喃都与聚氯乙烯的溶度参数相近，因此二者均是聚氯乙烯的良溶剂。 ( ) A. 对 B. 错

你可能感兴趣的试题

In artistic gymnastics，（）and（）are events for both men and women.

答案： A.vault
B.rings
C.floor exercise
D.uneven bars

Which of the following is an extreme sport？

答案： A.Bungee jumping.
B.Long jump.
C.High jump.
D.Ro...