能定量计算这二十个电路的输入输出阻抗、输出信号与输入信号的比值、电路中信号电流或电压与电路参数的关系、电路中信号的幅度与频率关系特性、相位与频率关系特性、电路中元器件参数的选择等。达到高级层次后，只要您愿意，受人尊敬的高薪职业－－电子产品和工业控制设备的开发设计工程师将是您的首选职业。-Quantitative calculation of the twenty to the input and output impedance of the circuit, the output signal and the ratio of the input signal, the circuit signal current or voltage and circuit parameters of the relationship between the circuit between the signal characteristics of amplitude and frequency, phase and frequency relations characteristics, circuit parameters in the selection of components. Reached an advanced level, as long as you wish, a respected high-paying career- electronics and industrial control equipment development and design engineers will be your first choice career.