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A. discoveries B. originals C. resources D. origins
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● Routing protocols use different techniques for assigning（71）to individual networks．Further, each routing protocol forms a metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal（72）.Some routing protocols can even use multiple paths when paths have an unequal cost.In either case,load（73）can improve overall allocation of network bandwidth. When multiple paths are used,there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination load balancing.Per-packet load balancing distributes the（74）across the possible routes in a manner proportional to the route metrics,Per-destination load balancing distributes packets across the possible routes based on（75）.（71）A. calls B. metrics C. links D. destinations （72）A. user B. distance C. entity D. cost （73）A. bracketing B. balancing C. downloading D. transmitting （74）A. destinations B. resources C. packets D. sources （75）A. destinations B. resources C. packets D. sources
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135 Increasing resources on the critical path activities may not always shorten the length of the project because:A. Certain activities are time-dependent rather than resource-dependent (i.e., using three ovens rather than one to bake a cake).B. Safety, OSHA and EPA may have placed restrictions on the number of people used on certain activities or in the physical location of the project.C. The skill level of the added resources might not be appropriate for the activities to be performed. D. Adding more resources may create additional work and produce inefficiencies (i.e., additional people may need training and supervision.)E. All of the above
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● Although a given waveform. may contain frequencies over a very broad range, as a practical matter any transmission system will be able to accommodate only a limited band of （71） . This, in turn, limits the data rate that can be carried on the transmission （72） . Asquare wave has an infinite number of frequency components and hence an infinite （73） . However, the peak amplitude of the kth frequency component, kf, is only 1/k, so most of the （74） in this waveform. is in the first few frequency components. In general, any digital waveform. will have （75） bandwidth. If we attempt to transmit this waveform. as a signal over any medium, the transmission system will limit the bandwidth that can be transmitted.（71）A. frequencies B. connections C. diagrams D. resources（72）A. procedure B. function C. route D. medium（73）A. source B. bandwidth C. energy D. cost（74）A. frequency B. energy C. amplitude D. phase（75）A. small B. limited C. infinite D. finite（71）A. frequenciesB. connectionsC. diagramsD. resources（72）A. procedureB. functionC. routeD. medium（73）A. sourceB. bandwidthC. energyD. cost（74）A. frequencyB. energyC. amplitudeD. phase（75）A. smallB. limitedC. infiniteD. finite
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The system has been designed to give students quick and easy to the digital resources of the library.A. accessB. passage C. way D. approach
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Scientific discoveries are often applied_____ industrial production methods.
A.forB.withC.toD.on
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● For （71） service, we need a virtual-circuit subnet. Let us see how that works. Theidea behind virtual circuits is to avoid having to choose a new （72） for every packet sent.Instead, when a connection is established, a route from the （73） machine to the destinationmachine is chosen as part of the connection setup and stored in tables inside the （74） . Thatroute is used for all traffic flowing over the connection, exactly the same way that thetelephone system works. When the connection is released, the virtual circuit is alsoterminated. With connection-oriented service, each packet carries an （75） telling whichvirtual circuit it belongs to.（71）A. connectionless B. connection-oriented C. datagram D. telegram（72）A. processor B. device C. route D. terminal（73）A. source B. route C. destination D. host（74）A. connections B. resources C. bridges D. routers（75）A. address B. identifier C. interface D. element
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● Virtualization is an approach to IT that pools and shares （71） so that utilization is optimized and supplies automatically meet demand. Traditional IT environments are often silos, where both technology and human （72） are aligned around an application or business function. With a virtualized （73） , people, processes, and technology are focused on meeting service levels, （74 ） is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible. We offer a broad spectrum of virtualization （75） that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.（71）A. advantages B. resources C. benefits D. precedents（72）A. profits B. costs C. resources D. powers（73）A. system B. infrastructure C. hardware D. link（74）A. content B. position C. power D. capacity（75）A. solutions B. networks C. interfaces D. connections
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Originally, the World-Wide Web was designed as information medium for （1）research teams. A deliberately simple implementation model was chosen to make it as simple as possible for authors to （2）documents to the web, and to （3）these in the sense of updating content. This implementation model is centered around the notion of resources, usually file-based. For the （4）intended use of the web, resources presented a useful abstraction, as they related to relatively self-contained chunks of information such as research publications and（5）pages. Such chunks of information typically could be set up and maintained independently of other resources, so that resources were the appropriate abstraction for composition and modification.（1）A. all B. world C. distributed D. internet（2）A. contribute B. write C. hand D. make（3）A. maintain B. consist C. modify D. correct（4）A. originally B. before C. success D. reform（5）A. some B. home C. company D. study
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X－rays are also called Rontgen rays ( )the discoveries who first put them to use.
A. in case ofB. in view ofC. in place ofD. in honor of
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Catalog sheets submitted with the bid must be “originals” and not copies; drawings, schematics and/or circuit diagrams and printed circuit board diagrams must be ().A、legislativeB、legionaryC、legibleD、legal
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The way to differentiate homonyms from polysemants is mainly to see their origins as well as sense relatedness.()
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Albert Szent-Gy?rgyi would most likely agree that[A] scientific claims will survive challenges.[B]discoveries today inspire future research.[C] efforts to make discoveries are justified.[D]scientific work calls for a critical mind.
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●At a basic level, cloud computing is simply a means of delivering IT resources as （）.Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, networking,programming tools,even communication services and collaboration （）。Cloud computing began as large-scale Internet service providers such as Google,Amazon,and others built out their infrastructure. An architecture emerged: massively scaled, （） distributed system resources,abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on （）“somewhere on the Intemet”and the application runs on both the "cloud servers”and the user’s browser.Both clouds and grids are built to scale horizontally very efficiently. Both are built towithstand failures of （） elements or nodes. Both are charged on a per-use basis. But while grids typically process batch jobs, with a defined start and end point, cloud services can be continuous. What’s more, clouds expand the types ofresources available —— file storage, databases, and Web services —— and extend the applicability to Web and enterprise applications.（）A. hardware B. computersC. services D. software（）A.computers B.disksC.machines D.tools（）A. horizontally B. verticallyC. inclined D. decreasingly（）A. clients B. middlewareC. servers D. hard disks（）A.entire B.individualC.general D.separate
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（ ）is a style of computing in which dynamically scalable and offer virtualized resources are provided as a service over the Internet.A. Cloud computing B. Big dataC. Social media D. Mobile computing
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The goal of（75）is to provide easy ，scalable access to computing resources and IT services.
A. Artificial intelligence
B. big data
C. cloud computing
D. data mining
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The more diverse knowledge one understands and actively absorbs, the probability of finding useful and _____discoveries.
A.novel
B.conventional
C.rebellious
D.narrative
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What is the difference between the CUoD and Utility Capacity On Demand?（）A、Utility allows for activation of resources by the hour. CUoD allows for permanent access to additional resources installed into the system.B、Utility allows for permanent access to additional resources installed into the system. CuOD allows for activation of resources by the hour.C、Utility allows for activation of resources by the minute. CUoD allows for permanent access to additional resources installed into the system.D、Utility allows for a 30 day usage of additional resources installed into the system. CUoD allows for permanent access to additional resources installed into the system.
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MX国际化文件是指以下哪个文件（）A、mx/resources/locales/messages.jsB、mx/resources/messages.jsC、mx/resources/index.jspD、mx/resources/locales/index.jsp
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the letter of credit requires “three copies of inspection certificate issued by CCIC”. The documents presented as follows. Which is acceptable？（）A、in 3 originalsB、in 3 copiesC、in 1 original and 2 copiesD、in 2 originals and 1 copy
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问答题Passage 1 The human race is using up the Earth's resources faster than ever before, according to a new report by the United Nations Population Fund. “Environmental devastation is not simply a waste of 1, it is a threat to the complex structures that 2human development,” says the report. 3 attention must be paid to find a（n） 4 between human and environmental needs, it says. The report, State of the World Population 2001, says that water supplies and agricultural lands are coming 5 such increasing pressure that, if left 6 , our planet will not be able to support us in future years. Over the past 70 years, the world’s population has tripled to 6.1 billion people, 7 water-use increasing six-fold, says the report. Already 508 million people live in 31 countries that lack water. And the problem is likely to 8 as the global population is 9 to rise to eight billion by 2025. By 2050, predicts the report, 4.2 billion people will be living in countries that cannot meet people's daily 10 needs. Unclean water and poor sanitation already kills over 12 million people every year. Food production is also 11 by environmental problems, says the report. “To 12 the future population and improve their diets, the world will have to double food production,” it says. “But since available cropland is 13 , most production will have to come from higher 14 rather than new 15 .” According to the report, global poverty cannot be 16 without 17 the environmental damage caused by these increases in consumption and population 18 . To reduce the burden on the planet, the report suggests, all efforts should be 19 to improve education and healthcare, as this would 20 reduce population growth.1. A. facilities B. resources C. reserves D. provisions2. A. support B. found C. retain D. advocate3. A. Intensive B. Intense C. Emergent D. Urgent4. A. equation B. tradeoff C. balance D. axis5. A. under B. into C. below D. beyond6. A. unnoticed B. behind C. alone D. unchecked7. A. in B. with C. by D. above8. A. aggravate B. heighten C. decline D. worsen9. A. projected B. speculated C. intended D. assessed10. A. luxurious B. utmost C. intrinsic D. basic11. A. affected B. effected C. reflected D. generated12. A. contain B. lodge C. furnish D. accommodate13. A. shrinking B. diminishing C. contracting D. waning14. A. outputs B. turnovers C. yields D. harvests15. A. cultivation B. production C. farming D. plowing16. A. lightened B. released C. elevated D. alleviated17. A. reversing B. inverting C. upsetting D. disregarding18. A. standards B. indexes C. norms D. levels19. A. tried B. taken C. done D. made20. A. in effect B. in turn C. in part D. by turns
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问答题Passage 1 What is the substance of discovery? Can we obtain the experience of 1 who discover and make their work generally 2 or must each generation of scientists and inventors 3 again? Why do some scientists burn out 4 young while others remain creative 5 old age? Why are so many discoveries and inventions 6 by those who work in poorly funded institutions? 7 scientists have no idea how they do science 8 historians of science have no idea how scientists do science, then who does? The strange thing is that we 9 as if discovery were the inevitable by-product 10_well-organized research programs and as if the 11 management techniques appropriate to 12 bridges, motorways and power stations were 13 to the generation of new ideas. We 14 of cost-effective science and of 15 resources into centers of excellence. By 16 such ideas to their conclusion, however, we 17 reduce the gene bank of cultural diversity to such a（n） 18 that we would produce only scientific clones-specialist technicians at 19 -whose imaginative powers, never awaked. 20 , planned research is essential, and scared resources need saving but, since science is essentially a journey into the unknown, there must be a place for occasional detours to examine the unexpected.1. A. them B. which C. those D. people2. A. available B. free C. open D. convenient3. A. absorb B. learn C. practice D. understand4. A. at B. by C. from D. when5. A. into B. as C. even if D. though6. A. collected B. made C. caused D. produced7. A. when B. Since C. If D. As8. A. yet B. but C. also D. and9. A. act B. function C. appear D. perform10. A. in B. by C. of D. for11. A. aim B. project C. assignment D. activity12. A. build B. building C. building of D. the building13. A. applicable B. right C. accurate D. just14. A. consider B. argue C. talk D. examine15. A. fastening B. making C. fixing D. concentrating16. A. observing B. chasing C. following D. obeying17. A. might B. must C. should D. can18. A. range B. spread C. stretch D. extent19. A. last B. large C. best D. length20. A. However B. Of course C. In addition D. Besides
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单选题The accepted criteria of adequate diet have been challenged by new discoveries in nutrition.A
formationsB
componentsC
standardsD
ingredients
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