All car makers are spending billions trying to figure out a future that is more______，more autonomous and steps back from fossil fuels。A.electricB.electricalC.electronicD.electrified
All car makers are spending billions trying to figure out a future that is more______，more autonomous and steps back from fossil fuels。
A.electric
B.electrical
C.electronic
D.electrified
B.electrical
C.electronic
D.electrified
参考解析
解析：本题考查形近词辨析。题目意为“所有的汽车制造商都在花费数以亿计的美元，试图找到一个更加电气化、更加自主的未来，并逐步退出化石燃料。”。A选项“电动的，电气车辆”，B选项“有关电的，电气科学的，C选项“电子的”， D选项“电气化的”。电气车辆electric vehicle，所以这里表示汽车的电气化应该使用electric，选项A正确。
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共用题干Climate Change:The Long Reach1.Earth is warming.Sea levels are rising.There's more carbon in the air,and Arctic ice is melting faster than at any time in recorded history.Scientists who study the environment to better gauge（评估） Earth's future climate now argue that these changes may not reverse for a very long time.2.People burn fossil fuels like coal and oil for energy.That burning releases carbon dioxide,a colorless gas.In the air,this gas traps heat at Earth's surface.And the more carbon dioxide released,the more the planet warms.If current consumption of fossil fuels doesn't slow,the long-term climate impacts could last thousands of years-and be more severe than scientists had been expecting.Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper.3.Most climate-change studies look at what's going to happen in the next century or so.During that time , changes in the planet's environment could nudge（推动）global warming even higher.For example, snow and ice reflect sunlight back into space.But as these melt,sunlight can now reach-and warm-the exposed ground.This extra heat raises the air temperature even more,causing even more snow to melt.This type of rapid exaggeration of impacts is called a"fast feedback".4.Zeebe says it's important to look at fast feedbacks.However,he adds,they're limited.From a climate change perspective,"This century is the most important time for the next few generations,"he told Science News."But the world is not ending in 2100."For this new study,Zeebe now focuses on"slow feedbacks".While fast feedback events unfold over decades or centuries,slow feedbacks can take thousands of years.Melting of continental ice sheets and the migration of plant life-as they relocate to more comfortable areas-are two examples of slow feedbacks.5.Zeebe gathered information from previously published studies investigating how such processes played out over thousands of years during past dramatic changes in climate.Then he came up with a forecast for the future that accounts for both slow and fast feedback processes.Climate forecasts that use only fast feedbacks predict a 4.5 degree Celsius(8.1 degree Fahrenheit)change by the year 3000.But slow feedbacks added another 1.5℃-for a 6℃ total increase,Zeebe reports.He also found that slow feedback events will cause global warming to persist for thousands of years after people run out of fossil fuels to burn.Paragraph 4______A:Fast FeedbacksB:A Prediction of Future Climate ChangeC:Rising of Sea LevelsD:Slow FeedbacksE:Impact of Burning Fossil FuelsF:Unpredictability Feedback Processes
共用题干Natural Gas1 Natural gas is produced from reservoirs deep beneath the earth's surface. It is a fossil fuel（矿物燃 料）,meaning that it is derived from organic material buried in the earth millions of years ago.The main corn- ponent of natural gas is methane（甲烷）.2 The popularity and use of clean natural gas have increased dramatically over the past 50 years as pipeline infrastructure（基础设施）has been installed to deliver it conveniently and economically to millions of residential,commercial and industrial customers worldwide.Today,natural gas service is available in all 50 states in the U.S.,and is the leading energy choice for fueling American homes and industries.More than 65 million American homes use natural gas.In fact,natural gas is the most economical source for home energyneeds,costing one-third as much as electricity. In addition to heating homes,much of the gas used in the United States is used as a raw material to manufacture a wide variety of products,from paint,to fibers for clothing,to plastics for healthcare,computing and furnishings.Natural gas is also used in a significant number of newelectricity-generating power plants.3 Natural gas is one of the safest and cleanest fuels available. It emits（发出）less pollution than other fossil fuels sources. When natural gas is burned,it produces mostly carbon dioxide（二氧化碳）and water va- por一the same substances emitted when humans breathe.Compared with some other fossil fuels,natural gas emits the least amount of carbon dioxide into the air when combusted（燃烧）一making natural gas the clea-- nest burning fossil fuel of all.4 The United States consumes about one-third of the world's natural gas output,making it the largest gas-consuming region in the world.The U.S.Department of Energy Information Administration forecasts thatnatural gas demand will grow by more than 50 percent by 2025.5 There are huge reserves of natural gas beneath the earth's surface.The largest reserves of natural gas can be found in Russia , West and North Africa and the Middle East. LNG（液化天然气）has been pro- duced domestically and imported in the United States for more than four decades.Today,the leading import-ers of LNG are Japan,Korea,France and Spain.Natural gas is stored deep______________.A:over the past 50 yearsB:beneath the earth's surfaceC:by more than 50 percentD:for more than four decadesE:as a raw materialF:for home energy needs
共用题干Climate Change:The Long Reach1.Earth is warming.Sea levels are rising.There's more carbon in the air,and Arctic ice is melting faster than at any time in recorded history.Scientists who study the environment to better gauge（评估） Earth's future climate now argue that these changes may not reverse for a very long time.2.People burn fossil fuels like coal and oil for energy.That burning releases carbon dioxide,a colorless gas.In the air,this gas traps heat at Earth's surface.And the more carbon dioxide released,the more the planet warms.If current consumption of fossil fuels doesn't slow,the long-term climate impacts could last thousands of years-and be more severe than scientists had been expecting.Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper.3.Most climate-change studies look at what's going to happen in the next century or so.During that time , changes in the planet's environment could nudge（推动）global warming even higher.For example, snow and ice reflect sunlight back into space.But as these melt,sunlight can now reach-and warm-the exposed ground.This extra heat raises the air temperature even more,causing even more snow to melt.This type of rapid exaggeration of impacts is called a"fast feedback".4.Zeebe says it's important to look at fast feedbacks.However,he adds,they're limited.From a climate change perspective,"This century is the most important time for the next few generations,"he told Science News."But the world is not ending in 2100."For this new study,Zeebe now focuses on"slow feedbacks".While fast feedback events unfold over decades or centuries,slow feedbacks can take thousands of years.Melting of continental ice sheets and the migration of plant life-as they relocate to more comfortable areas-are two examples of slow feedbacks.5.Zeebe gathered information from previously published studies investigating how such processes played out over thousands of years during past dramatic changes in climate.Then he came up with a forecast for the future that accounts for both slow and fast feedback processes.Climate forecasts that use only fast feedbacks predict a 4.5 degree Celsius(8.1 degree Fahrenheit)change by the year 3000.But slow feedbacks added another 1.5℃-for a 6℃ total increase,Zeebe reports.He also found that slow feedback events will cause global warming to persist for thousands of years after people run out of fossil fuels to burn.Arctic ice has never been melting so fast in______.A:the extra heatB:rapid exaggeration of impactsC:the exposed groundD:recorded historyE:a very long timeF:previously published studies
共用题干Climate Change:The Long Reach1.Earth is warming.Sea levels are rising.There's more carbon in the air,and Arctic ice is melting faster than at any time in recorded history.Scientists who study the environment to better gauge（评估） Earth's future climate now argue that these changes may not reverse for a very long time.2.People burn fossil fuels like coal and oil for energy.That burning releases carbon dioxide,a colorless gas.In the air,this gas traps heat at Earth's surface.And the more carbon dioxide released,the more the planet warms.If current consumption of fossil fuels doesn't slow,the long-term climate impacts could last thousands of years-and be more severe than scientists had been expecting.Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper.3.Most climate-change studies look at what's going to happen in the next century or so.During that time , changes in the planet's environment could nudge（推动）global warming even higher.For example, snow and ice reflect sunlight back into space.But as these melt,sunlight can now reach-and warm-the exposed ground.This extra heat raises the air temperature even more,causing even more snow to melt.This type of rapid exaggeration of impacts is called a"fast feedback".4.Zeebe says it's important to look at fast feedbacks.However,he adds,they're limited.From a climate change perspective,"This century is the most important time for the next few generations,"he told Science News."But the world is not ending in 2100."For this new study,Zeebe now focuses on"slow feedbacks".While fast feedback events unfold over decades or centuries,slow feedbacks can take thousands of years.Melting of continental ice sheets and the migration of plant life-as they relocate to more comfortable areas-are two examples of slow feedbacks.5.Zeebe gathered information from previously published studies investigating how such processes played out over thousands of years during past dramatic changes in climate.Then he came up with a forecast for the future that accounts for both slow and fast feedback processes.Climate forecasts that use only fast feedbacks predict a 4.5 degree Celsius(8.1 degree Fahrenheit)change by the year 3000.But slow feedbacks added another 1.5℃-for a 6℃ total increase,Zeebe reports.He also found that slow feedback events will cause global warming to persist for thousands of years after people run out of fossil fuels to burn.Zeebe came up with his future climate prediction by analyzing______.A:the extra heatB:rapid exaggeration of impactsC:the exposed groundD:recorded historyE:a very long timeF:previously published studies
共用题干Climate Change:The Long Reach1.Earth is warming.Sea levels are rising.There's more carbon in the air,and Arctic ice is melting faster than at any time in recorded history.Scientists who study the environment to better gauge（评估） Earth's future climate now argue that these changes may not reverse for a very long time.2.People burn fossil fuels like coal and oil for energy.That burning releases carbon dioxide,a colorless gas.In the air,this gas traps heat at Earth's surface.And the more carbon dioxide released,the more the planet warms.If current consumption of fossil fuels doesn't slow,the long-term climate impacts could last thousands of years-and be more severe than scientists had been expecting.Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper.3.Most climate-change studies look at what's going to happen in the next century or so.During that time , changes in the planet's environment could nudge（推动）global warming even higher.For example, snow and ice reflect sunlight back into space.But as these melt,sunlight can now reach-and warm-the exposed ground.This extra heat raises the air temperature even more,causing even more snow to melt.This type of rapid exaggeration of impacts is called a"fast feedback".4.Zeebe says it's important to look at fast feedbacks.However,he adds,they're limited.From a climate change perspective,"This century is the most important time for the next few generations,"he told Science News."But the world is not ending in 2100."For this new study,Zeebe now focuses on"slow feedbacks".While fast feedback events unfold over decades or centuries,slow feedbacks can take thousands of years.Melting of continental ice sheets and the migration of plant life-as they relocate to more comfortable areas-are two examples of slow feedbacks.5.Zeebe gathered information from previously published studies investigating how such processes played out over thousands of years during past dramatic changes in climate.Then he came up with a forecast for the future that accounts for both slow and fast feedback processes.Climate forecasts that use only fast feedbacks predict a 4.5 degree Celsius(8.1 degree Fahrenheit)change by the year 3000.But slow feedbacks added another 1.5℃-for a 6℃ total increase,Zeebe reports.He also found that slow feedback events will cause global warming to persist for thousands of years after people run out of fossil fuels to burn.After fossil fuels are used up,global warming will continue for______.A:the extra heatB:rapid exaggeration of impactsC:the exposed groundD:recorded historyE:a very long timeF:previously published studies
The author believes that__________．A.her future will be free from troublesB.it is difficult to become patientC.there are more good things than bad thingsD.good things will happen if one keeps trying
共用题干第二篇Around 45%of the UK's carbon dioxide emissions come from the energy people use every day-at home and when they travel.In order to generate that energy,fossil fuels(coal oil,and gas)are burnt,and these produce greenhouse gases-in particular carbon dioxide(CO2).Car emissions are a major problem, but the truth is that more CO2 comes from the energy used at home.The average household creates aroundfive and a half tonnes of CO2 a year,and it is the same CO2 that is changing the climate and damaging the environment.CO2 and various other gases wrap the earth in an invisible blanket helping to prevent heat from escaping.Without this greenhouse effect,the average temperature on Earth would be around-18℃， compared with the current average of around+15℃．The composition of this blanket of gases has remained relatively constant for many thousands of years.However,since the industrial revolution began around 200 years ago,people have been burning increasing amounts of fossil fuels,thus releasing more CO2 and other greenhouse gases in the process.This has increased the heating effect of the blanket,trapping more of the sun's energy inside the Earth's atmosphere in turn the Earth's temperature has increased more rapidly in a shorter period of time than it has for thousands of years.In 2008,the total UK CO2 emissions were 533 million tonnes.27%(144 million tonnes)of those emissions came from the energy used to heat,light,and power homes.Transport emissions caused by passenger cars,buses and motorcycles accounted for a further 16%(87 million tonnes)of the UK's CO2 emissions.These figures show that a significant amount of CO2 results from ordinary citizens carbon footprint in their daily activities and lifestyle.The effects of climate change can be seen all around us.Weather patterns are becoming more and more fractured and uncertain,and over the last century trends in warm weather have become increasingly common.In the UK in the last 40 years,winters have grown warmer,with much heavier rainfall.One of the clearest shifts over the last 200 years is towards summers that are hotter and drier,causing pervasive（普遍的）water shortages.Recent years have been the hottest since records began and during August 2003,the hottest ever outdoor temperature in the UK was recorded-38.5℃．What is the author's opinion about the level of CO2 emissions in the UK?A:The majority of CO2 emissions come from motorized transport.B:CO2 emissions may cause climate change in the future.C:More CO2 emissions come from homes than from cars.D:The average citizen does not create much CO2.
Text3 Mention price cartels and many people will think of big,overt ones like the one OPEC runs for oil and the now-extinct one for diamonds.But at least as damaging are the many secret cartels in sucb unglamorous areas as ball-bearings and cargo rates,which go on unnoticed for years,quietly bumping up the end cost to consumers of all manner of goods and services.Collusion among producers to rig prices and carve up markets is thriving,with the cartels growing ever more intricate and global in scope.Competition authorities have uncovered several whopping conspiracies in recent years,including one in which more than 20 airlines worldwide had fixed prices on perhaps 20 billion of freight shipments.They were fined a total of 3 billion;and so far the compensation claims from ripped-off customers comfortably exceed l billion.One academic study found that the typical cartel raised the price of the goods or services in question by 20%.Another suggested that cartels were robbing poor countries'consumers of tens of billions ofdollars a year:if so,negating all the aid that rich countries'governments send them.Investigators are still unravelling a huge global network of cartels among suppliers of a wide range of car parts.Makers of seat belts,radiators and foam seat-stuffing have had hefiy fines slapped on them.Earlier this month the European Commission fined five makers of automotive bearings a total of 953m（1.32 billion）.This week its investigators raided a bunch of makers of car exhausts.Also in recent days,Brazilian prosecutors have charged executives from a dozen foreign train-makers accused ofrigging bids for rail and subway contracts in the country's main cities.Price-fixing has infected high finance,too.Some of banking's biggest names stand accused offiddling interest-rate and foreign-exchange benchmarks.The good news is that enforcement has got tougher,smarter and more coordinated.Gone are the days when price-fixers got a slap on the wrist.Firms can expect swingeing fines,and bosses can go to jail.Since many cartels now operate across borders,so do investigators:American and Japanese trustbusters joined forces to flush out the car-parts cartels.And incentives for whistleblowers have also increased:around 50 countries now offer immunity or reduced penalties for snitches.That is all for the better,but the penalties for price-fixing remain too mild.The best study of the issue so far concluded that,given the still-low risk of detection,collusion pays.Yet beyond a certain point-which the fines now imposed by American and European regulators have probably reached-fines inflict so much damage on guilty companies that they undermine competition instead of enhancing it.The answer is stiffer prison sentences,particularly for senior executives.American courts,only too ready to lock up other types of miscreants for a long time,have rarely jailed egregious price-fixers for anything like the maximum of ten years that the law allows.Other countries have even more scope to increase sentences.According to Paragraph 2,with the thriving of the cartels____A.the compensation claims fTom inferior articles for customers have decreased by nowB.markets segment from producers is more prosperous than beforeC.the fund to poor countries from rich economies would finally slow downD.the competition among airlines have become intense
Text3 Mention price cartels and many people will think of big,overt ones like the one OPEC runs for oil and the now-extinct one for diamonds.But at least as damaging are the many secret cartels in sucb unglamorous areas as ball-bearings and cargo rates,which go on unnoticed for years,quietly bumping up the end cost to consumers of all manner of goods and services.Collusion among producers to rig prices and carve up markets is thriving,with the cartels growing ever more intricate and global in scope.Competition authorities have uncovered several whopping conspiracies in recent years,including one in which more than 20 airlines worldwide had fixed prices on perhaps 20 billion of freight shipments.They were fined a total of 3 billion;and so far the compensation claims from ripped-off customers comfortably exceed l billion.One academic study found that the typical cartel raised the price of the goods or services in question by 20%.Another suggested that cartels were robbing poor countries'consumers of tens of billions ofdollars a year:if so,negating all the aid that rich countries'governments send them.Investigators are still unravelling a huge global network of cartels among suppliers of a wide range of car parts.Makers of seat belts,radiators and foam seat-stuffing have had hefiy fines slapped on them.Earlier this month the European Commission fined five makers of automotive bearings a total of 953m（1.32 billion）.This week its investigators raided a bunch of makers of car exhausts.Also in recent days,Brazilian prosecutors have charged executives from a dozen foreign train-makers accused ofrigging bids for rail and subway contracts in the country's main cities.Price-fixing has infected high finance,too.Some of banking's biggest names stand accused offiddling interest-rate and foreign-exchange benchmarks.The good news is that enforcement has got tougher,smarter and more coordinated.Gone are the days when price-fixers got a slap on the wrist.Firms can expect swingeing fines,and bosses can go to jail.Since many cartels now operate across borders,so do investigators:American and Japanese trustbusters joined forces to flush out the car-parts cartels.And incentives for whistleblowers have also increased:around 50 countries now offer immunity or reduced penalties for snitches.That is all for the better,but the penalties for price-fixing remain too mild.The best study of the issue so far concluded that,given the still-low risk of detection,collusion pays.Yet beyond a certain point-which the fines now imposed by American and European regulators have probably reached-fines inflict so much damage on guilty companies that they undermine competition instead of enhancing it.The answer is stiffer prison sentences,particularly for senior executives.American courts,only too ready to lock up other types of miscreants for a long time,have rarely jailed egregious price-fixers for anything like the maximum of ten years that the law allows.Other countries have even more scope to increase sentences.It can be inferred from Paragraph 3 that______A.the global network ofcartels among suppliers will lose faith in the competitive marketB.more Brazilian train markets would be accused for the reason of cartelsC.foreign train makers would disrupt the fair in the railway business in BrazilD.interest rate will be decreased due to the price fixing policy
资料：Google and Uber have grabbed most of the attention regarding the advent of self-driving cars, but on Sunday, Lyft threw down the ultimate challenge: A majority of autonomous vehicles for Lyft within a mere five years. The bold claim was made by Lyft co-founder John Zimmer in a post on Medium outlining his company's vision for the next decade. "Within five years a fully autonomous fleet of cars will provide the majority of Lyft rides across the country," said Zimmer, indicating that early versions of such cars have been in operation in San Francisco and Phoenix. Usually when tech founders lay out their vision, it’s typical to hear grand claims that almost push the boundaries of believability. That's what tech innovation is about. But in the case of self-driving cars, the situation is a bit more complicated. Uber has already begun rolling out self-driving car tests in Pittsburgh and Google is hard at work on the same kind of solution on the West Coast. Therefore, talk of getting self-driving cars on the road is, at this point, less about the technology and more about logistics. We know Google has enough cash to triple down on any initiative it decides to tackle. And as the current ride-sharing leader in the U.S., Uber has enough market share-powered credibility that a future including self-driving Uber cars isn't unrealistic. Today there are some internet-based ride sharing system but to overcome the critical mass the system has to be real-time, automated and extremely easy to use. However in the case of Lyft, which continues to struggle against Uber (one report claims that Uber has over 80 percent market share in the U.S.), such a short timeline toward rolling out a fleet of self-driving cars seems somewhat ambitious. Nevertheless, Zimmer continues his vision essay with even more bold predictions. "By 2025, private car ownership will all but end in major U.S. cities," says Zimmer, a prediction that, if it turns out to be true, would mean it would take just eight years for the majority of the human-driven cars on U.S. roads to disappear. Possible? Sure. Likely? Eight years seems like, once again, a bit of wishful thinking on Zimmer's part. Remember, it hasn't even been 10 years since the arrival of the iPhone, and as recent events prove, smartphones are still a category that can yield catastrophic results if not done right. And those are just mobile devices, not vehicles entrusted with transporting and protecting human lives. To be fair, Zimmer's essay does offer some facts and figures in an attempt to back up his positions, but much of it doesn't appear to take into account variables such as the heavily embedded interests of automobile companies still relying on consumer auto sales, as well as the many legal and roadway logistics that will need to be addressed in order to bring about this massive transformation in such a short time. Oddly, Zimmer's vision does little to address the millions of human jobs that will be lost once self-driving cars displace not only taxi drivers, but truck drivers. "We believe that in the first five or more years following the introduction of autonomous vehicles, the need for human drivers will actually increase, not decrease," writes Zimmer. "When autonomous cars can only solve a portion of those trips, more Lyft drivers will be needed to provide service to the growing market of former car owners," writes Zimmer. But what about after five years, when autonomous cars can provide full service? What about the human drivers? The pushback from human drivers losing work will likely be another, major ripple in the evolution of self-driving cars, as well as other automated systems entering U.S. society in coming years. However, none of these logistical issues diminish Zimmer's ideas. His vision of the future of autonomous vehicles seems quite logical and in step with most who work in and watch the space closely. But the speed bump in accepting his vision wholesale is his ambitious self-driving car timeline in general, and for Lyft in particular. A.We need to reach everyone’s potential to realize self-driving carsB.There are still many problems to be solved in self-driving carsC.Lyft co-founder says most of its cars will be autonomous in 5 yearsD.The advantages and disadvantages of self-driving cars
Fossil fuels are and will be still ______ for at least the next two-three decades at relatively low costs.A.productiveB.convenientC.renewableD.available
资料：Google and Uber have grabbed most of the attention regarding the advent of self-driving cars, but on Sunday, Lyft threw down the ultimate challenge: A majority of autonomous vehicles for Lyft within a mere five years. The bold claim was made by Lyft co-founder John Zimmer in a post on Medium outlining his company's vision for the next decade. "Within five years a fully autonomous fleet of cars will provide the majority of Lyft rides across the country," said Zimmer, indicating that early versions of such cars have been in operation in San Francisco and Phoenix. Usually when tech founders lay out their vision, it’s typical to hear grand claims that almost push the boundaries of believability. That's what tech innovation is about. But in the case of self-driving cars, the situation is a bit more complicated. Uber has already begun rolling out self-driving car tests in Pittsburgh and Google is hard at work on the same kind of solution on the West Coast. Therefore, talk of getting self-driving cars on the road is, at this point, less about the technology and more about logistics. We know Google has enough cash to triple down on any initiative it decides to tackle. And as the current ride-sharing leader in the U.S., Uber has enough market share-powered credibility that a future including self-driving Uber cars isn't unrealistic. Today there are some internet-based ride sharing system but to overcome the critical mass the system has to be real-time, automated and extremely easy to use. However in the case of Lyft, which continues to struggle against Uber (one report claims that Uber has over 80 percent market share in the U.S.), such a short timeline toward rolling out a fleet of self-driving cars seems somewhat ambitious. Nevertheless, Zimmer continues his vision essay with even more bold predictions. "By 2025, private car ownership will all but end in major U.S. cities," says Zimmer, a prediction that, if it turns out to be true, would mean it would take just eight years for the majority of the human-driven cars on U.S. roads to disappear. Possible? Sure. Likely? Eight years seems like, once again, a bit of wishful thinking on Zimmer's part. Remember, it hasn't even been 10 years since the arrival of the iPhone, and as recent events prove, smartphones are still a category that can yield catastrophic results if not done right. And those are just mobile devices, not vehicles entrusted with transporting and protecting human lives. To be fair, Zimmer's essay does offer some facts and figures in an attempt to back up his positions, but much of it doesn't appear to take into account variables such as the heavily embedded interests of automobile companies still relying on consumer auto sales, as well as the many legal and roadway logistics that will need to be addressed in order to bring about this massive transformation in such a short time. Oddly, Zimmer's vision does little to address the millions of human jobs that will be lost once self-driving cars displace not only taxi drivers, but truck drivers. "We believe that in the first five or more years following the introduction of autonomous vehicles, the need for human drivers will actually increase, not decrease," writes Zimmer. "When autonomous cars can only solve a portion of those trips, more Lyft drivers will be needed to provide service to the growing market of former car owners," writes Zimmer. But what about after five years, when autonomous cars can provide full service? What about the human drivers? The pushback from human drivers losing work will likely be another, major ripple in the evolution of self-driving cars, as well as other automated systems entering U.S. society in coming years. However, none of these logistical issues diminish Zimmer's ideas. His vision of the future of autonomous vehicles seems quite logical and in step with most who work in and watch the space closely. But the speed bump in accepting his vision wholesale is his ambitious self-driving car timeline in general, and for Lyft in particular. A.At almost unprecedented moment in history, we should reach our potential to decide whether to take the right pathB.At almost unprecedented moment in history we should reach our potential to decide whether to take decisive actionC.At almost unprecedented moment history,we should reach our potential to choose the right answers to all the problems encountered by usD.At almost unprecedented moment in history we should our potential to realize the advent of the era of self-driving cars
共用题干Computers in CarsYou're far from home on a lonely road.Shadowy forests stretch away on both sides.A thick mist（雾）makes it difficult to see far beyond your car's windshield（挡风玻璃）.“Can this be route 90A?”you wonder. if it is,you should be near a town.Yet there's no hint of one .Night is closing in.And you're low on gasoline.This is a situation where an in-car computer that can navigate would be a big help.A car computer that navigates?Yes!Such computers exist.Several experimental models are being tested by General Motors,Ford,Chrysler,and several foreign car makers.These computers vary in detail .But they all contain series of maps on videodiscs or videotapes.For example,one computer system contains 13,300 maps covering the continental US.Before starting out on a trip,a driver can type in the code for the region he or she plans to drive through .The computer then shows a map of that region.At the same time,a tiny radio re-ceiver linked to the computer goes to work.It picks up signals from navigation satellites such as the NAVSTAR network.Using these signals,the computer shows the car's position at all times and displays this position on the map.The computer can also calculate and display the best route to follow.A navigation computer may also receive and use data about road construction,weather condi- tions,and traffic jams.This information would be displayed to the driver and the computer would also use the information to work out alternate（交替的）routes.Most cars nowadays also contain computers that help cars run more efficiently .Microproces- sors（微处理机）control certain engine functions by regulating the mixing of fuel. Data on car speed,oil pressure,revolutions per minute,engine temperature,and fuel level can be displayed as digital data(numbers)or warning lights.Some auto designers suggest that a central computer display be used to clearly present such timely information as car speed and fuel level.Warning lights would indicate a drop in oil pres- sure or a sudden rise in engine temperature .To get more information on these conditions,the driver could call it up on the computer display screen.When needed,the computer could be “asked”to provide navigation aid or information about the car's condition. Without signals from navigation satellites,the in-car computer______.A: would still be able to locate the car's position at all timesB: would fail to locate the car's positionC: could still work out the best route to followD: would seek help from the radio receiver linked to it
共用题干Green Energy1.Green energy is energy that is produced in a manner that has, less of a negative impact to the environment than energy sources like fossil fuels,which are often produced with harmful side effects."Greener" types of energy that often come to mind are solar,wind,geothermal and hydro energy.There are several more,even including nuclear energy,that is sometimes considered a green energy source because of its lower waste output relative to energy sources such as coal or oil.2.The goal of green energy is generally to create power with as little pollution as possible produced as a by-product. Every form of energy collection will result in some pollution,but those that are green are known to cause less than those that are not. Most people who advocate greener sources of energy claim that the result of worldwide use of green energy will result in the ability to preserve the planet for a longer time.Greenhouse gases,a by-product of traditional sources of energy such as fossil fuels are thought to be causing global warming,or the process of the Earth heating up at an accelerated pace.3.It is not completely necessary for green energy sources to come from places like solar or wind fields,which are examples of green"power plants".A green energy source can be a building that is designed in a way that it keeps itself cool in the daytime and heated in the night through its architectural design rather than having an air-conditioning or a heating system. The conservation of energy through architectural（建筑学的）design becomes, itself, a green energy source. Similarly, many sources of green energy can come directly from the area in which the energy is needed rather than from an outside source.4.One of the goals of green energy technology is to take existing fossil fuel energy technology and clean it up so it is produced more cleanly. One such case is that of clean coal technology,where scientists are trying to find ways to extract energy from coal and other fossil fuels without all of the harmful side effects.The success of such these types of green energy depend upon the ability to extract harmful by-products from fossil fuels while not only being energy efficient,but by being cost efficient as well.Greenhouse gases are thought to be causing______.A:global warmingB:carbon emissionC:lower waste outputD:a green energy sourceE:fossil fuels F: clean fuels
共用题干Green Energy1.Green energy is energy that is produced in a manner that has, less of a negative impact to the environment than energy sources like fossil fuels,which are often produced with harmful side effects."Greener" types of energy that often come to mind are solar,wind,geothermal and hydro energy.There are several more,even including nuclear energy,that is sometimes considered a green energy source because of its lower waste output relative to energy sources such as coal or oil.2.The goal of green energy is generally to create power with as little pollution as possible produced as a by-product. Every form of energy collection will result in some pollution,but those that are green are known to cause less than those that are not. Most people who advocate greener sources of energy claim that the result of worldwide use of green energy will result in the ability to preserve the planet for a longer time.Greenhouse gases,a by-product of traditional sources of energy such as fossil fuels are thought to be causing global warming,or the process of the Earth heating up at an accelerated pace.3.It is not completely necessary for green energy sources to come from places like solar or wind fields,which are examples of green"power plants".A green energy source can be a building that is designed in a way that it keeps itself cool in the daytime and heated in the night through its architectural design rather than having an air-conditioning or a heating system. The conservation of energy through architectural（建筑学的）design becomes, itself, a green energy source. Similarly, many sources of green energy can come directly from the area in which the energy is needed rather than from an outside source.4.One of the goals of green energy technology is to take existing fossil fuel energy technology and clean it up so it is produced more cleanly. One such case is that of clean coal technology,where scientists are trying to find ways to extract energy from coal and other fossil fuels without all of the harmful side effects.The success of such these types of green energy depend upon the ability to extract harmful by-products from fossil fuels while not only being energy efficient,but by being cost efficient as well.Paragraph 3______A:Why Do We Develop Green Energy?B:What Is the Goal of Green Energy?C:What Is the Weakness of Green Energy?D:What Is a Green Energy?E:How Much Does the Green Energy Cost Every Year?F: How Many Kinds of Green Energy We Can Take Use of?
共用题干Green Energy1.Green energy is energy that is produced in a manner that has, less of a negative impact to the environment than energy sources like fossil fuels,which are often produced with harmful side effects."Greener" types of energy that often come to mind are solar,wind,geothermal and hydro energy.There are several more,even including nuclear energy,that is sometimes considered a green energy source because of its lower waste output relative to energy sources such as coal or oil.2.The goal of green energy is generally to create power with as little pollution as possible produced as a by-product. Every form of energy collection will result in some pollution,but those that are green are known to cause less than those that are not. Most people who advocate greener sources of energy claim that the result of worldwide use of green energy will result in the ability to preserve the planet for a longer time.Greenhouse gases,a by-product of traditional sources of energy such as fossil fuels are thought to be causing global warming,or the process of the Earth heating up at an accelerated pace.3.It is not completely necessary for green energy sources to come from places like solar or wind fields,which are examples of green"power plants".A green energy source can be a building that is designed in a way that it keeps itself cool in the daytime and heated in the night through its architectural design rather than having an air-conditioning or a heating system. The conservation of energy through architectural（建筑学的）design becomes, itself, a green energy source. Similarly, many sources of green energy can come directly from the area in which the energy is needed rather than from an outside source.4.One of the goals of green energy technology is to take existing fossil fuel energy technology and clean it up so it is produced more cleanly. One such case is that of clean coal technology,where scientists are trying to find ways to extract energy from coal and other fossil fuels without all of the harmful side effects.The success of such these types of green energy depend upon the ability to extract harmful by-products from fossil fuels while not only being energy efficient,but by being cost efficient as well.The success of green energy depend upon the ability to extract harmful by-products from______.A:global warmingB:carbon emissionC:lower waste outputD:a green energy sourceE:fossil fuels F: clean fuels
Which statement describes the rule of split horizon?（）A、Only routers can split boundaries (horizons) between concentric networks.B、All distance vector protocols require fall back routers that may cause momentary loops as the topology changes.C、Networks can only remain fully converged if all information about routers is sent out all active interfaces.D、Information about a route should not be sent back in the direction from which the original update come.E、Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.
单选题Oil is a nonrenewable resource, whereas sunshine is limitless. So why not run cars on solar power? Because a car powered by solar collecting panels would be fine on a sunny day, but as soon as the sun went behind a cloud, the car would no longer function. Which of the following is presupposed in the argument against running a car on solar power?ASolar power is cleaner than fossil fuels, and it involves less geopolitical risk.BIn most of the northern hemisphere, it can be expected that more than 150 days a year will be cloudy.CNo system exists for storing solar energy for a car’s use when the car is not in direct sunlight.DNo one has yet introduced a commercially viable process for mass-producing solar cells that convert more than 10 percent of incoming sunlight into usable energy.EConsumers accustomed to the rapid acceleration of gasoline-powered cars will not accept the weak acceleration of solar-powered cars.
单选题When paying out nylon line from around the bitts（）.Astand clear of the bitts and use two or more round turns under your figure eightsByou can surge the line even with a single turnCno extra turns are necessary since nylon has a high coefficient of frictionDstand in the bight of the line
单选题Where do one-fourth of global carbon emissions largely come from?ABurning fossil fuels.BElectricity generation.CDeforestation.DResidential and commercial buildings.
多选题Which two steps check out a database connection from the connection pool?（）ADB GetBDB ReadCDB WriteDDB Release
单选题Which statement describes the rule of split horizon?（）AOnly routers can split boundaries (horizons) between concentric networks.BAll distance vector protocols require fall back routers that may cause momentary loops as the topology changes.CNetworks can only remain fully converged if all information about routers is sent out all active interfaces.DInformation about a route should not be sent back in the direction from which the original update come.EEach AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.
单选题What is meant by veering the anchor chain? （）ABringing the anchor to short stayBHeaving in all the chainCLocking the windlass to prevent more chain from running outDPaying out more chain