绘图题:图E-5所示是二极管结构图,当外施电压N区为(+),P区为(-)时请标明内电场、外电场的方向?空间电荷区是变宽还是变窄?
参考答案:
如图E-6所示。
It has not been decided who will ______ to the post of chairman of the board, the former
holder of which succeeded ______the company world famous. [ ]
A. hold; to make
B. succeed; in making
C. stick; making
D. lead; to make
煤气过鼓风机后产生20℃左右温升的原因是什么?