print(list(range(5)))的输出结果为“[0, 1, 2, 3, 4] ”()
石油中的烃类化合物可以分为()
A. 饱和烃、烯烃、环烷烃
B. 饱和烃、炔烃、芳香烃
C. 链式饱和烃、环烷烃、芳香烃
D. 烯烃、环烷烃、芳香烃
Taking a path which led out of the town, we crossed a few fields until we came to a dense wood()
熔融缩聚属于()
A. 本体聚合
B. 溶液聚合
C. 悬浮聚合
D. 乳液聚合