A、sight or sound B、seeing or sounding C、visual or audible D、seeing or hearing
A、When the windlass is in trouble, the sailor must go and call the electrician to repair it. B、When the derrick is in trouble, the sailor must go and call the electrician to repair it. C、When the winch is in trouble, the sailor must go and call the electrician to repair it. D、When the winch is in trouble, the sailor must go and call the carpenter to repair it.
A、My vessel was anchored waiting for dry-docking B、Only towards the end did I sound the alarm C、Hearing emergency alarm,everyone got confused D、When everything was almost under control, it is unnecessary to bother others
A、It informs survivors that assistance may be nearby B、It informs survivors when the battery's charge condition has weakened C、It informs survivors when the SART switches to the standby mode D、It informs survivors that a nearby vessel is signaling on DSC
A、It monitors messages from the external server and updates the routing table as needed. B、It maintains the leases for the DHCP server and reassigns addresses to new subscribers. C、It sends keepalives to the subscriber and makes the address available when the subscriber stops responding. D、It sends keepalives to the subscriber and removes the host route when the subscriber stops responding.
A、It allows users to retain all uncommitted changes when exiting exclusive configuration mode. B、It allows multiple users to edit private copies of the configuration concurrently. C、It causes the loss of all uncommitted changes when exiting exclusive configuration mode. D、It excludes other users from editing the configuration.
A、It increases B、It decreases C、It remains the same D、It fluctuates,depending on the gearing system