They also helped build the vast network of railroads that ____ important trade centers essential to industrial grented.A. had linked B. link C. Linking D. linked
They also helped build the vast network of railroads that ____ important trade centers essential to industrial grented.
A. had linked
B. link
C. Linking
D. linked
B. link
C. Linking
D. linked
参考解析
解析：首先可判断出此句是关系代词that 引导的定语从句。先行词是network ofrailroads，从句中缺少谓语动词，故可排除C。根据主句的时态，应用一般过去时，故选D。
相关考题：
Text 3 In recent years, railroads have been combining with each other, mergingsintossuper systems, causing heightened concerns about monopoly. As recently as 1995,the top four railroads accounted for under 70 percent of the total ton-miles moved by rails. Next year, after a series of mergers is completed, just four railroads will control well over 90 percent of all the freight moved by major rail carriers.Supporters of the new super systems argue that these mergers will allow for substantial cost reductions and better coordinated service. Any threat of monopoly, they argue, is removed by fierce competition from trucks. But many shippers complain that for heavy bulk commodities traveling long distances, such as coal, chemicals, and grain, trucking is too costly and the railroads therefore have them by the throat.The vast consolidation within the rail industry means that most shippers are served by only one rail company. Railroads typically charge such“captive”shippers 20 to 30 percent more than they do when another railroad is competing for the business. Shippers who feel they are being overcharged have the right to appeal to the federal government's Surface Transportation Board for rate relief, but the process is expensive, time consuming, and will work only in truly extreme cases. Railroads justify rate discrimination against captive shippers on the grounds that in the long run it reduces everyone's cost. If railroads charged all customers the same average rate, they argue, shippers who have the option of switching to trucks or other forms of transportation would do so, leaving remaining customers to shoulder the cost of keeping up the line. It's theory to which many economists subscribe, but in practice it often leaves railroads in the position of determining which companies will flourish and which will fail.“Do we really want railroads to be the arbiters of who wins and who loses in the marketplace?”asks Martin Bercovici, a Washington lawyer who frequently represents shipper. Many captive shippers also worry they will soon be his with a round of huge rate increases. The railroad industry as a whole, despite its brightening fortuning fortunes. still does not earn enough to cover the cost of the capital it must invest to keep up with its surging traffic. Yet railroads continue to borrow billions to acquire one another, with Wall Street cheering them on. Consider the .2 billion bid by Norfolk Southern and CSX to acquire Conrail this year. Conrail's net railway operating income in 1996 was just million, less than half of the carrying costs of the transaction. Who's going to pay for the rest of the bill? Many captive shippers fear that they will, as Norfolk Southern and CSX increase their grip on the market.第51题：According to those who support mergers railway monopoly is unlikely becauseA. cost reduction is based on competition.B. services call for cross-trade coordination.C. outside competitors will continue to exist.D. shippers will have the railway by the throat.
Supporters of the rationalization of slavery believe that the trade[A] was out of good intents from the beginning.[ B ] helped the development of local religion.[C] was a help for civilizing the Africans.[D] drove the evils out of the African religions.
The introduction of the printing technology to England helped to spread English into many countries and places over the world so that it has become the most important international language in the present day.()
Your customer wants to build a network for a financial trading floor that has a requirement for multiple high-value transactions, which are also vital to the customer. What are the two most critical requirements? （）(Choose two.)A. no single point of failureB. trading database server locationC. redundant application servers locationD. deterministic response to all failuresE. determine which protocol to use
The topic of the passage is that __.A.the control of population is essential to the development of a nationB.natural resources are important to the economic development of a countryC.awareness of the effects of man's actions is as important as population controlD. developed countries should do more to protect natural environment on the earth
资料：You can not go forward by going backward. Take the current debate about trade and globalization, for instance, while the impulse to erect trade barriers is understandable given the pain experienced in recent years, it is not the way to create lasting growth and shared prosperity.Over the past three decades, global flows of trade and investment have accelerated dramatically, creating enormous economic value. However, trade and globalization have also brought wrenching job losses. The financial crisis and weak recovery have made matters worse, intensifying the backlash against trade and globalization.Part of the problem is that the benefits of trade and investment go largely unrecognized, while the job losses are often overstated. Another significant problem is that participation in trade and investment is limited to a relatively small set of firms. In the U.S., large firms account for three-quarters of total exports, and the vast majority of small and medium-size businesses do not export. This means firms have a great opportunity to boost growth and productivity through wider participation in trade.That leaves the question of how to help those hurt by trade and globalization. Too often we talk about re-training as a panacea（万能药）.And yes, it helps. But it needs to take into account the different requirements of each workforce and needs to be part of a wider set of support for affected workers and communities.Above all, it is important to recognize that our economic transition to a global and digital economy is an irreversible trend. Only by broadening participation in the global economy, rather than by trying to turn back the clock, will we discover answers to today’s most vexing economic problems.What of the following is the best description of the author’s attitude toward trade and globalization?A.CriticalB.DoubtfulC.IndifferentD.Approving
资料：You can not go forward by going backward. Take the current debate about trade and globalization, for instance, while the impulse to erect trade barriers is understandable given the pain experienced in recent years, it is not the way to create lasting growth and shared prosperity.Over the past three decades, global flows of trade and investment have accelerated dramatically, creating enormous economic value. However, trade and globalization have also brought wrenching job losses. The financial crisis and weak recovery have made matters worse, intensifying the backlash against trade and globalization.Part of the problem is that the benefits of trade and investment go largely unrecognized, while the job losses are often overstated. Another significant problem is that participation in trade and investment is limited to a relatively small set of firms. In the U.S., large firms account for three-quarters of total exports, and the vast majority of small and medium-size businesses do not export. This means firms have a great opportunity to boost growth and productivity through wider participation in trade.That leaves the question of how to help those hurt by trade and globalization. Too often we talk about re-training as a panacea（万能药）.And yes, it helps. But it needs to take into account the different requirements of each workforce and needs to be part of a wider set of support for affected workers and communities.Above all, it is important to recognize that our economic transition to a global and digital economy is an irreversible trend. Only by broadening participation in the global economy, rather than by trying to turn back the clock, will we discover answers to today’s most vexing economic problems.What does the author think of re-training as a solution?A.It is a one-size-fit-all solution.B.It is not helpful to those hurt by trade and globalization.C.It should meet the different needs of affected workforce.D.It should not be talked about so often.
资料：You can not go forward by going backward. Take the current debate about trade and globalization, for instance, while the impulse to erect trade barriers is understandable given the pain experienced in recent years, it is not the way to create lasting growth and shared prosperity.Over the past three decades, global flows of trade and investment have accelerated dramatically, creating enormous economic value. However, trade and globalization have also brought wrenching job losses. The financial crisis and weak recovery have made matters worse, intensifying the backlash against trade and globalization.Part of the problem is that the benefits of trade and investment go largely unrecognized, while the job losses are often overstated. Another significant problem is that participation in trade and investment is limited to a relatively small set of firms. In the U.S., large firms account for three-quarters of total exports, and the vast majority of small and medium-size businesses do not export. This means firms have a great opportunity to boost growth and productivity through wider participation in trade.That leaves the question of how to help those hurt by trade and globalization. Too often we talk about re-training as a panacea（万能药）.And yes, it helps. But it needs to take into account the different requirements of each workforce and needs to be part of a wider set of support for affected workers and communities.Above all, it is important to recognize that our economic transition to a global and digital economy is an irreversible trend. Only by broadening participation in the global economy, rather than by trying to turn back the clock, will we discover answers to today’s most vexing economic problems.What is the MAIN opinion expressed in the opening paragraph?A.Trade and globalization are debatable.B.Erecting trade barriers can not bring growth and prosperity.C.Trade and globalization have caused severe pain in recent years.D.Opposing trade and globalization is understandable and reasonable.
When we are reading,the important thing is to grasp the essential meaning,not to learn every single word.A:clasp B:grabC:understand D:grapple
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Hanseatic merchants benefited by all of the following EXCEPT( ) A.the use of trading centers in distant cities B.a new system of recording commercial transactions C.the opening of overland trade routes across northern Europe D.access to markets in about 200 cities
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单选题You have a router running BGP for the MPLS network and OSPF for the local LAN network at the sales office. A route is being learned from the MPLS network that also exists on the OSPF local network.It is important that the router chooses the local LAN route being learned from the downstream switch running OSPF rather than the upstream BGP neighbor. Also，if the local OSPF route goes away，the BGP route needs to be used. What should be configured to make sure that the router will choose the LAN network as the preferred path？（）Astatic route needs to be addedBfloating static route needs to be addedCbgp backdoor commandDospf backdoor command
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