单项选择题
The piecewise linear model，equivalent circuit of the diode consists of（）.
A.a junction capacitor，a battery，a small resistor，and the ideal diode B.a battery，asmallresistor，and the ideal diode C.a battery and the ideal diode D.the ideal diode
单项选择题 The characteristic of an ideal diode are those of a switch that can conduct current（）.
单项选择题 Which of the following is not a commonly used semiconductor material’？（）
问答题 试分析图电路的输出电压可调节的范围。
