超短波治疗中患者的温热感超过治疗要求的剂量等级时应()。
A.升高电压
B.降低电流表读数
C.减弱氖光灯亮度
D.增加电极皮肤间隙
E.缩短电极皮肤间隙
参考答案:D
灭火时,当燃烧体呈流淌状燃烧时,应将二氧化碳灭火器的喷流()向火焰喷射。
A、由近至远
B、由远至近
C、由上至下
D、由下至上
When the changing of a VHF channel / frequency is accepted,say().
A.I am going to change to VHF channel
B.I am certainly going to change to VHF channel
C.Changing to VHF channel
D.VHF channel. has been changed