作为防雷用的氧化锌压敏电阻，主要技术参数有（）和残压等几种。
A.保护电压
B.压敏电压
参考答案：B
百团大战的总指挥是[ ]
A、徐向前
B、聂容臻
C、朱德
D、彭德怀
I in this city since I five.
A．have lived ; was
B．live ; was
C．have lived ; have been
D．live ; have been
