7.这滤波器的响应特性( response characteristic 等效于维恩电桥 8.这个电路的工作情况类似于图1-10的电路 9试求该球10秒后的速度。 The response characteristic of this filter is equivalent to that of wien bridge. This circuit is similar in operation to the circuit of Fig 1-10 Find the velocity of the ball 1os later7. 这滤波器的响应特性（response characteristic） 等效于维恩电桥。 8. 这个电路的工作情况类似于图1－10的电路。 9. 试求该球10秒后的速度。 The response characteristic of this filter is equivalent to that of Wien bridge. This circuit is similar in operation to the circuit of Fig.1-10. Find the velocity of the ball 10s later