未知题型 控制包括的基本步骤有E.反馈控制结果

未知题型 According to the passage, 'special cases' refers to cases that ______.A.students attend a school only part-timeB.students never attended a school they listed on their applicationC.students purchase false degrees from commercial firmsD.students attended a famous school

单项选择题 差分放大电路的主要作用是____。 A、稳定增益 B、克服零点漂移 C、扩展频带 D、提高输入电阻