对于零级反应，增加反应物的浓度可提高化学反应速率。
参考答案：错
I bought the train tickets at the station easily during the spring rush, though ________ of them ________ it.
A．nobody; expected
B．none; had expected
C．nobody; had expected
D．none; expected
图示的文物是在什么地方出土的？（）
A．山顶洞人遗址
B．北京人遗址
C．元谋人遗址
D．河姆渡人遗址
