属于强制检定的工作计量器具，未按照规定申请检定，或者经检定不合格的，任何单位和个人（）。
参考答案：不得使用
As their memories decline, some old people tend to be talkative because they ______ forget what has just been said.
A．anxiously
B．particularly
C．easily
D．hardly
简述普通闸阀填料泄漏的原因及处理方法。
