题干
He to me that he had to leave right away.
A：explained
B：asked
C：told
D：say
答案(点此获取答案解析）
A
He to me that he had to leave right away.
A：explained
B：asked
C：told
D：say
C分别在三种不同实验条件下进行，它们的起始状态均为
、
、
。在三种条件下，反应物A的浓度随时间的变化如图所示。下列说法中正确的是