第一章 Semiconductor Diodes：提出课程研究对象，研究的任务和基本假设，了解课程中的基本概念，介绍半导体的发展史，N型和P型半导体材料的导电机制和PN结的电阻电容概念1.1半导体的发展简史-本征半导体:通过两个案例来介绍半导体的发展简史：本征半导体。[单选题]When a diode is doped with either a pentavalent or a trivalent impurity its resistance will （ ） .
1.2掺杂半导体:通过改变材料导电特性的能力，称之为“掺杂”。经过掺杂工艺的半导体材料，称为掺杂半导体。
1.3半导体二极管:介绍PN结构成的产品--二极管。
1.4二极管的伏安特性曲线:二极管加正向电压和反向电压时，其导电性能是不一样的，本节看一下这种差别的定量关系。
1.5二极管的等效电路、电容及齐纳二极管:二极管有三种等效电路，理想等效电路，分段等效电路和简化等效电路。本节课看看这些元件是如何在电路中工作的。
选项:[decrease, increase, make the resistance stable against variation due to temperature]
[单选题]The piecewise linear model, equivalent circuit of the diode consists of （ ）.选项:[a battery and the ideal diode, a battery, a small resistor, and the ideal diode, a junction capacitor, a battery, a small resistor, and the ideal diode, the ideal diode]
[单选题]The characteristic of an ideal diode are those of a switch that can conduct current（ ） .选项:[in both directions but in only one direction at a time, depends on the circuit it is used in, in both directions, in one direction only]
[单选题]Which of the following is not a commonly used semiconductor material'? （ ） 选项:[silicon, germanium, lead, carbon]
[单选题]When a p-n junction is reverse-biased, its junction resistance is （ ）.选项:[low, constantly changing, high, determined by the components that are external to the device]
