The clock board has been working in the tracking mode for 3 days, it automatically enters the hold mode due to the loss of the tracking clock, holding time can be up to hours.
A: 6
B: 12
C: 24
D: 48
A: 6
B: 12
C: 24
D: 48
举一反三
- Which of the following working modes for slave clocks is the most accurate? A: Tracking synchronization mode B: Hold mode C: Free oscillation mode D: Clock output mode
- In the Tracking (TRACKING) mode, we need to connect CH1 with CH2 to form the Series mode or the Parallel mode.
- Almost everybody can wake up at a particular time without an alarm clock because he has a body clock inside himself.
- Doppler speed log may work in two mode ,one is seabed tracking ,another is______ .
- By the time you arrive， I ________ working for two hours． A: will be B: can C: will have been D: have been