Although they wanted to keep it quiet, news of the job loses ________ very quickly.

A．got by

B．got out

C．got over

D．got off

液压电梯紧急下降手动操作装置，在操作时必须有持续的（）来保持其动作状态。

A、电力

B、液压力

C、人力

D、机械力