New surveys suggest that people are more stressed and working longer hours than ever with

technological tools constantly ______. [ ]

A. updating

B. updates

C. updated

D. to update

钢轨探伤车探伤系统小车控制盘上，报警指示灯亮说明（）。

A、气压不足

B、油压不足

C、电源不足

D、小车架有危险