Which of the following MF frequencies is internationally allocated for use for transmitting NEVTEX-type broadcasts?
A: 518 kHz using FEC mode.
B: 4. 209. 5 kHz using FE mode.
C: 486 kHz using FBC mode in China.
D: All of the above.
A: 518 kHz using FEC mode.
B: 4. 209. 5 kHz using FE mode.
C: 486 kHz using FBC mode in China.
D: All of the above.
A
举一反三
- 智慧职教: Which of the following HF frequencies is internationally allocated for use for transmitting NAVTEX type broadcasts?
- . Which of the following frequencies is as international distress and safety frequencies on MF for radio telephone? A: 2187.5 kHz B: 2174.5 kHz C: 2182kHz D: 2177. OkHz
- How to access the cardiac function by using ultrasound:( ) A: M<br/>mode B: B<br/>mode C: Spectral<br/>Doppler pattern D: Tissue<br/>Doppler imaging E: All of the above
- 以下( )不是国际NAVTEX广播频率。 A: 490 kHz B: 518 kHz C: 4209.5 kHz D: 486 kHz
- Which of the following frequencies is not used for DSC service A: 829lkHz B: 8414.5 kHz C: 16804.5 kHz D: 4207.5 kHz
内容
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All of the following are DSC watch-keeping frequencies, except( ) A: . 2187.5 kHz. B: 2182 kHz C: 12577 kHz D: 6312 kHz
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The current working mode on the Internet has transitioned from the file server mode to the mode.
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In the Tracking (TRACKING) mode, we need to connect CH1 with CH2 to form the Series mode or the Parallel mode.
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4.Businesses reduce these costs and expedite shipping times by using ________which are easily moved from one mode to another.
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国际NAVTEX系统使用的专用频率是____。（ ） A: 500 kHz B: 518 kHz C: CH16 D: 4 210 kHz