What does “be reduced to rubble” mean in the sentence “The old town of Beichuan, home to 20,000 people, was reduced to rubble”?

A、electronic chart display and indication system B、electronic chart display and information system C、electric chart display and informing system D、electronic chart display and indicating system

A . He is cleaning the street B . He is forty C . He is a farmer D . He is all right

A . They shouldn’t change their plan． B . They should change their mind． C . Weather forecasts are not reliable． D . The tennis game won’t last long．

A . Stores data on the network and connects the local-area network (LAN) to the wide-area network (WAN) B . Routes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN) C . Broadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN) D . Reads Media Access Control (MAC) addresses to forward messages to the correct location and connects the local-area network (LAN) to the wide-area network (WAN)

A . Eliminates unburned fuel oil residues from the firebox B . Increases boiler efficiency C . Flushes away mineral deposits inside the water tubes D . Cleans soot deposits from the inside of the stack

A . The system change number, which is a point in time relative to transactions within a given database.  B . A number that represents time. Thus, at 1300 hours, the SCN is the same on all databases.  C . The security change number, which represents the security code that is needed to access any database structure. D . A conversion factor that converts internal database time to external clock time.  E . UTC time in the database, providing a standardized way of tracking time in Oracle.&e

A . Emergency Position Indicating Radar Buoy B . Electronic Pulse Indicating Radiobeacon C . Emergency Position Indicating Radiobeacon D . None of the above

A . There’S been nothing but rain for quite some time． B . He’S bored with the changing weather． C . He thinks that it’11 rain for three more weeks． D . He’S bored about the topic on weather．

A . It means renting a place from other people． B . It means renting a place from people who rents the place． C . It means renting a place for a short period． D . It means renting a place from people who is away to other places.

A . UniDirectional Loop Detection B . Unspecified Distribution Label Detection C . Unified Distribution Label Direction D . UniDirectional Link Detectio

A .  The system change number， which is a point in time relative to transactions within a given database. B .  A number that represents time. Thus， at 1300 hours， the SCN is the same on all databases.  C .  The security change number， which represents the security code that is needed to access any database structure. D .  A conversion factor that converts internal database time to external clock time. E .  UTC time in the database，providing a standardized way of tracking time in Oracle.