David threatened________his neighbour to the police if the damages were not paid.

A．to be reported

B．reporting

C．to report

D．having reported

皮带秤仪表累积器接受称重传感器输送的重量信号和测速传感器输送的速度信号，放大后按积分或累加法运算得出瞬时流量和（）。