根据晶体管的输出特性曲线，在放大区，当IB一定时，IC的值随UCE变化（）。
A.很小
B.很大
C.为0
D.已经饱和
参考答案：A
When did the James leave
A．The James left that afternoon.
B．The James didn’t get away until afternoon.
C．The James left in the evening.
D．The James were supposed to leave in the evening.
