关于感应电动势的大小,下列说法正确的是( )
A:跟穿过闭合电路的磁通量有关
B:跟穿过闭合电路的磁通量的变化大小有关
C:跟穿过闭合电路的磁通量的变化快慢有关
D:跟电路中电阻大小有关
— I think that this is an interesting lecture _____.
— Oh, come on! No lectures for me. I've been tired ____ to lectures.
____
反射活动的结构基础是