提示:1)Where did you go?
2)How did you go there?
3)Who did you go with?
4)How was the weather there?
5)What did you do there?
下列关于植物激素及其类似物在农业生产实践上的应用,符合实际的是( )
由电场强度的定义式E= Fq 可知,在电场中的同一点( )
元素观是化学的重要观念之一.下列有关元素的说法中错误的是( )