问题
选择题
— What do you think of the concert?
— There was nothing special； it was only____. [ ]
A. average
B. usual
C. normal
D. common
答案
答案：A
搜题请搜索小程序“爱下问搜题”
— What do you think of the concert?
— There was nothing special； it was only____. [ ]
A. average
B. usual
C. normal
D. common
答案：A
C分别在三种不同实验条件下进行，它们的起始浓度均为
、
及
。反应物A的浓度随时间的变化如下图所示。
_________0，判断其理由是__________ __