【单选题】在下列说法中只有()说法是正确的
B.
由于PN结交界面两边存在电位差,所以,当把PN结两端短路时就有电流流过
C.
PN结方程可以描述PN结的正向特性和反向特性,也可以描述PN结的反向击穿特性
【简答题】PN结中扩散电流的方向是:由 区到 区,漂移电流的方向是由 区到 区。(填大写字母)
【单选题】汉隶到下面哪种书体之间的一种书体总称是魏碑?()
【单选题】钢的光滑圆试样拉伸断口,其剪切唇面与拉伸应力轴成:
【单选题】钢的光滑圆试样拉伸断口,其剪切唇面与拉伸应力轴()。
【单选题】A friend tells you that he deposited money in a bank one year ago and it now purchases 2% more goods than it did a year ago. Which of the following is consistent with this claim?
A.
the nominal interest rate was 1% and the inflation rate was 1%
B.
the nominal interest rate was 3% and the inflation rate was 5%
C.
the nominal interest rate was 6% and the inflation rate was 4%
D.
the nominal interest rate was 7% and the inflation rate was 3.5%