Using a multimeter, you can measure the peak-to-peak amplitude of the electrical signal.
A. 对
B. 错
The minus sign appears in the voltage gain because the output signal amplitude become smaller compared with the input.
A. 对
B. 错
矿内空气中常见的有害气体有哪些?《煤矿安全规程》规定各类有害气体的最高允许浓度分别是多少?