In PIM-SM operations，to which device does the first router that connects with the multicast source sendthe register message？（）

A . renaming the control files B . re-creating the control files C . dropping a user in your database D . dropping a tablespace in your database E . configuring the database instance to operate in the ARCHIVELOG or NOARCHIVELOG mode

A . Spark plug B . Heat of compression C . Carburetor D . Glow ping

A . means of rheostat the governor settings B . a balance coil excitation C . adjusting the governor settings D . changing excitatio

A . immediately after receiving the first packet on the shared tree for a given （S，G） B . after receiving over 1 kb/s traffic onthe shared tree for a given （S，G） C . 10 seconds after receiving the first packet on the shared tree for a given （S，G） D . 30 seconds after receiving the first packet on the shared tree for a given （S，G） E . after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）

A . invert the CO extinguisher B . squeeze the two trigger handles together C . remove the locking pin D . open the discharge valve

A . ongoing support handoff meeting B . staff training C . detailed design development D . staging and system migratio

A . paralleling B . series-mounting C . running D . control

A . allows client traffic， captures data on all channels B . allows client traffic， captures data on a single channel C . allows no client traffic， captures data on all channels D . allows no client traffic， captures data on a single channel

A . Multicast source B . Multicast receiver C . RP D . RP mapping agent E . Designated Router （DR）

A . The source must send a PIM Register message to the rendezvous point （RP）. B . The source must first join the multicast group using IGMP before sending. C . The source must perform a Request to Send （RTS） and Clear to Send （CTS） handshake with the  PIM designated router （DR）. D . No control plane signaling needs to be performed； the source can simply begin sending on the local subnet.

A . Undo tablespace B . USERS tablespace C . SYSAUX tablespace D . SYSTEM tablespace E . Temporary tablespace

A . call for B . call off C . call on D . cal lout

A . It will respond only to interrogation by 9-Ghz radar signals B . A SART will normally respond to interrogation from a searching vessel's radar if the radar antenna is at least 15 meters high C . A SART will normally respond to interrogation from a searching aircraft's radar if the radar's output power is at least 10，000 watts and the aircraft is at a height of 3000 feet and within 30 nautical miles D . All of the above

A . z/OS B . Linux C . Sun Solaris 9 D . Microsoft Windows 2003

A . zero B . eliminated C . different D . equal

A . NetFlow can report on the number of traffic matches for each class map in a configured QoS policy configuration. B . NetFlow records can be used to understand traffic profiles per class of service for data, voice, and video traffic. C . NetFlow can discover the protocols in use and automatically adjust QoS traffic classes to meet policy-map requirements. D . NetFlow can be configured to identify voice and video traffic flows and place them into a lowlatency queue for expedited processing.

A . The colder seawater passing through the condenser tube bundles of the various stages increases evaporator vacuum B . The amount of heated feed water discharged from the feed water heater after cndenser is increased C . Fewer non-condensable gases are created by the flow of colder seawater D . More seawater is allowed to pass through the flint stage overflow weir

A . Ongoing Support Handoff Meeting B . Staff Training C . Detailed Design Development D . Staging and System Migratio

A .  Ensure that database is running with version 10.1 compatibility. B .  Enable Flashback Logging. C .  Enable Supplemental Logging. D .  Ensure that the database is running with version 10.0 compatibility. E .  Ensure that the database is in ARCHIVELOG mode.

A . gangs employed B . windlass trouble C . gangs unavailable D . shortage of navigational chart

Researchers at the Biorobotics (生物机械技术)Laboratory of McGill University in Montreal are building a robot , known as Micro Surgery robot-1(MSR- I for short), that will perform. delicate operations under the control of a human surgeon. The robot is specifically designed for performing eye surgery but could have other applications, such as the removal of brain tumors. The system could also be used to allow surgeons and their students to practise simulated surgery that feel like the real thing- without the real consequences for the patients. During the operations, the surgeon manipulates a set of control known as the master. These are connected through a high- performance computer to the robot. Both the master and the robot have two limbs, When the surgeon moves the masters' limbs, the robots limbs move in exactly the same way, except that the movements can be scaled down as much as a thousand times. This will eliminate hand tremor and poor accuracy and thus reduce the damage to the eye that can occur with present microsurgery techniques. Each of the robots limbs has a minimum movement of one micrometer---more than one hundred times the precision of the human hand. The computer also creates a three - dimensional robot' s eye view of the inside of the eye that the surgeon can see by wearing a virtual reality helmet (虚拟现实头盔) that has a small lens in front of each eye. To provide the surgeon with such a realistic experience, MSR-I must be able to move rapidly, but this requires extremely fast computing. To handle the computational demands of instant interaction, the McGill team is constructing its own parallel-processing computer., It is al so studying areas such as muscle mechanism, artificial intelligence and optics, and has a already built another micro robot MR- I, capable of manipulating a single living cell. Although commercial applications of the new system are not expected for several years, its basic mechanical components will be ready for testing in a few months, "The day when micro robots will be able to perform. surgery without human intervention is many years away," says Hunter, "in the meantime , a system such as MRS-I is a necessary precursor." The so-called "virtual reality "mentioned in this passage is actually. A．a surgical tool used for operations B．a computer system used to produce life- like illusions C．a new kind of applications in a visual technology. D a way to carry out operations in a visual sense