如图所示为A、B两个导体的I﹣U图线，由图线可知
A．RA＞RB
B．RA＜RB
C．RA=RB
D．无法确定
答案：B
目前比较主流的有快捷交换方式和( )交换方式
—Can you tell me Kitty's address.
—I don't know, either. But I'll tell you her address as soon as she ______ to me.[ ]
A. writes
B. write
C. wrote
D. written
