下列那种焊接方式是压力容器最常用的方法()
A、压焊
B、熔焊
C、钎焊
D、激光焊
参考答案:B
如图所示,四个相同的金属容器共轴排列,它们的间距与容器的宽度相同,轴线上开有小孔.在最左边、最右边两个容器上加电压U后,容器之间就形成了匀强电场.今有一个电子从最左边容器的小孔沿轴线入射,刚好没有从最右边容器出射,则该电子停止运动前( )
A.通过各容器的速度比依次为∶∶1
B.通过各容器的时间比依次为5∶3∶1
C.通过各容器间隙所用的时间比依次为5∶3∶1
D.通过各容器间隙的加速度比依次为5∶3∶1
Which one of the following clients is at the greatest risk for aspiration ?()
A.A stroke client with dysarthria.
B.An ambulatory client with Alzheimer's disease.
C.A 92-year-old client who needs help with activities of daily living (ADLs).
D.A client with severe, deforming rheumatoid arthritis.