What does blowing tubes accomplish?（）

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 . Oil-lubricated bearings B . Lignum vitae C . Hard rubber D . Bronze bushing

A . Receives saturated steam from the generating tubes B . Serves as a reservoir of boiler feed water C . Holds internal fittings for separation of moisture from steam D . Collects steam exhausted from the turbine

A .  HSRP well-known physical MAC address B .  Vendor code C .  HSRP router number D .  HSRP group number E .  HSRP well-known virtual MAC addre

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 . Wooden (lignum vitae) strips B . Hard rubber C . Resin bonded composition D . Bronze bushing

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 . completely drain the boiler in an emergency B . prevent sludge from forming in the drum C . remove floating impurities from the boiler water surface D . remove settled solids from the water drum

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.

What does the word "they" (Para. 3) refer to？ A．the layers B．wind-blow]a deposits C．volcanic eruptions D．the terrestrial rocks

A．protein B．plasma C．serum D．Whole blood