An increasing proportion of our population, unable to live without advanced medical involvement, will become progressively more reliant on expensive technology.

A．interference

B．interruption

C．intervention

D．interaction

从SF6气体钢瓶引出气体时，应使用减压阀降压。当瓶内压力降至（）Pa.（1个大气压）时，即停止引出气体，并关紧气瓶阀门，戴上瓶帽。

A.0；

B.9.8³103；

C.9.8³104；

D.9.8³106