材料：What advantages does the eye have over the radar ？The eye has the following advantages： Reliable

A . Security is isolated by the HMC B . Support Live Partition Mobility C . Operating system faults are isolated D . Reduced system management during upgrade

A . It is effective in controlling fire in flowing oil such as coming from a broken fuel line B . It absorbs heat from materials that could cause reignition C . Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishment D . Once the surface is blanketed with foam and the fire is extinguished，no further foam is required

A . VLANs establish broadcast domains in switched networks. B . VLANs utilize packet filtering to enhance network security. C . VLANs provide a method of conserving IP addresses in large networks. D . VLANs provide a low-latency internet working alternative to routed networks. E . VLANs allow access to network services based on department, not physical location. F . VLANs can greatly simplify adding, moving, or changing hosts on the network.

A . The message can be directed to the desired location B . The message can follow the earth‟s curvature C . The quality of message can not be affected by climatic D . the range of the message extend and the quality of reception is improved

A . When heated, it will move proportional to the amount the metal has lengthened or expanded B . The pointer associated with the pyrometer scale can be made to also measure engine RPM C . It can be utilized in exhaust manifolds and heat exchangers interchangeably D . It can indicate temperature at a distant point from the source heat

A .  It supports admission control that allows a network to reject or downgrade new RSVP sessions if one of the interfaces in the path has reached the limit （that is， all reservable bandwidth is booked）. B .  RSVP signals QoS requests per individual flow. In the request the authorized user （authorization object） and needed traffic policy （policy object） are sent. The network can then provide best-effort delivery to these individual flows. C .  RSVP streamlines communication by making it unnecessary to inform network devices of flow parameters （IP addresses and port numbers）. D .  Because of the stateful RSVP architecture， continuous signaling does not have to occur. E .  The flow-based approach is scalable to large implementations， such as the public Internet， because RSVP tracks each individual flow.

A . They are less expensive B . They are smaller for equivalent pumping ability C . They pump more cargo in less time D . All of the above

A . VLANs establish broadcast domains in switched networks. B . VLANs utilize packet filtering to enhance network security. C . VLANs provide a method of conserving IP addresses in large networks. D . VLANs provide a low-latency internetworking alternative to routed networks. E . VLANs allow access to network services based on department,not physical location. F . VLANs can greatly simplify adding,moving,or changing hosts on the network.

A.He can"t fmd good subjects to photograph． B.His indoor shots are too dark． C.His pictures are often blurry． D.His camera is too big for good detail．

A．Reduced density B．Improved crystallinity C．Greater density D．Improved strength

A．New membership discounts. B．Free lectures. C．Free audio programs. D．A Free magazine.

A.To make the backpackmore comfortable for the wearer. B.To put the backpack on the market. C.To test the advantage of the backpack. D.To promote the backpack in anewspaper or on television.

A.It is impossible for Toby to pass the exam. B.He doesn" t know whether Toby will pass the exam or not. C.Toby will certainly pass the exam. D.Toby doesn"t know the way to the classroom.

A.mistaken B.unprepared C.unnecessary D.misunderstood

A.Disappearing gradually． B.Giving out into the air． C.Hot and breathless． D.Pleasing and comfortable．

A. People can only buy nuptial stuffat a Tiffany store. B. Only a Tiffany store provides a marriage ceremony. C. Marriage is becoming more and more like luxuries. D. One can buy a marriage just like buying things in Tiffany"s.

A.Nancy should visit her neighbors and make some complaints. B.Nancy should talk about her children with her neighbors. C.Nancy should let the neighbors" son stop playing the radio. D.Nancy should say hello to the neighbors whenever she comes across them.Questions 18-21 are based on the following dialogue.

A.A disk or plate placed under a drinking glass to protect a table top. B.A vessel engaged in coastal trade. C.A roller coaster. D.A resident of a coastal area.

A.It has pleasant weather all year round． B.It produces wealth as well as high-tech． C.It is not likely to attract lots of investors and nerds． D.It is an old city with many sites of historical interest．

A.Exercising can"t help reduce the harm caused by sitting. B.The harm depends on the prolonged time sitting at a desk. C.Exercising is not necessary for people. D.Exercising has no advantages for people who often sit.

A.People don"t pay attention to their health. B.Few people are willing to support travel medicine. C.Most travellers firmly believe that they will be safe. D.Health comes last compared with others.

A.Jane will certainly be glad to hear about Bill" s promotion. B.Jane has lost her job. C.Jane probably won" t feel pleased with Bill" s promotion. D.Jane should have got the promotion.