A、of
B、on
C、at
D、in
更多“The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.”相关的问题
A、The control equipment B、The power unit C、The transmission system D、The follow-up mechanism
A、The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator B、The transmission is not initiated and "ERROR" is indicated on the display readout C、The transmission will be made with "default" information provided automatically D、The receiving station will poll the DSC unit of the vessel in distress to download the necessary information
A、increases as the square of the current B、decreases as the square root of the current C、remains the same, as it is independent of current flow D、increases in direct proportion as the current
A、Each ISDN B channel has transmission speeds of up to 64 kbps. B、The ISDN B channel can carry video, voice or data. C、The ISDN B channel transmission rate varies depending on the service used. D、The ISDN D channel transmits control information. E、The ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.
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