A:1
B:2
C:3
D:4
化学思想方法是化学实验探究的重要方法,其中之一为控制变量法.如图探究影响反应速率的因素是( )
The prisoner has been ________ to death because he killed a ________.
Funtawild Adventure is very popular and _____________ tourists visit it year by year.