更多"[单选题]医用高频电流的频率范围是( )。"的相关试题:
[单选题]医用低频电流的频率范围是多少Hz?( )
A. 0~100Hz
B. 0~1000Hz
C. 0~10000Hz
D. 0~100000Hz
E. 0~1000000Hz
[单选题]医用中电频电流的频率范围是( )。
A. 1~10kHz
B. 10~20kHz
C. 1~100kHz
D. 10~100kHz
E. 20~100kHz
[单选题]
高频的频率范围是()。
A.300kHz-3MHz。
B.3MHz-30MHz。
C.30MHz-300MHz。
D.300MHz-3GHz。
[单选题]
甚高频的频率范围是()。
A.300kHz-3MHz。
B.3MHz-30MHz。
C.30MHz-300MHz。
D.300MHz-3GHz。
[单选题]高频电疗法采取的电流频率为
A.100kHz以上
B.0-1kHz
C.0-100kHz
D.0-1000kHz
E.1kHz-100kHz
[单选题]高频电疗法采用的电流频率为
A.10kHz 以上
B.100kHz 以上
C.1000kHz 以上
D.10000kHz 以上
E.100000kHz 以上
[单选题]高频电疗法采取的电流频率是( )。
A. 100kHz以上
B. 0~1kHz
C. 0~100Hz
D. 0~1000kHz
E. 1kHz~100kHz
[判断题]( )天线发射和接收无线电波:发射时把高频电流转换为电磁波;接收时把电磁波转换为高频电流
A.正确
B.错误
[单选题]短波电流的频率范围是( )。
A. 3~30MHz
B. 30~50MHz
C. 50~60MHz
D. 60~80MHz
E. 100MHz
[单选题]油浸式变压器局部放电特高频检测法中特高频的频率指()范围内的电磁波。
A.300MHz-3000MHz
B.1000MHz-3000MHz
C.300MHz~2000MHz
D.1000MHz-2000MHz
[单选题]单级电刀是在一个回路中利用频率大于( )kHz的高频电流作用于人体所产生的热能和放电,对组织进行切割、止血的电外科设备。
A. 100
B. 150
C. 200
D. 250
[判断题] 工频电流比高频电流更容易引起皮肤灼伤。
A.正确
B.错误
[单选题]单级电刀是在一个回路中利用频率大于( )kHz的高频电流作用于人体所产生的热能和放电,对组织进行切割、止血的电外科设备。
A.100
B.150
C.200
D.250
[单选题]
某甚高频电台工作频率范围是118MHz~136.975MHz,
该电台可提供25kHz频率间隔的信道总数是____。
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