- A.400
- B.800
- C.4000
- D.8000
- A.600
- B.900
- C.1200
- D.1500
- A.1~0.1m(1~10-1m)
- B.10~1m(1-1~10-2m)
- C.10~0.1mm(10-2~10-3m)
- D.1~0.1mm(10-3~10-4m)
- A.100~10Mm(108~107m)
- B.10~1Mm(107~106m)
- C.1000~1000kMm(106~105m)
- D.100~10kMm(105~104m)
- A.300~3000MHz
- B.3~30GHz
- C.30~300GHz
- D.300~3000GHz
- A.10~1km(104~103m)
- B.1000~100m(103~102m)
- C.100~10m(102~10m)
- D.10~1m
- A.3~30kHz
- B.300~3000kHz
- C.3~30MHz
- D.30~300MHz。
- A.3~30Hz
- B.30~300Hz
- C.300~3000Hz
- D.3~30kHz
- A.物理
- B.数据
- C.网络
- D.传输
- A.传送层
- B.应用层
- C.表示层
- D.会话层