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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.
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 cars
B.There are still many problems to be solved in self-driving cars
C.Lyft co-founder says most of its cars will be autonomous in 5 years
D.The advantages and disadvantages of self-driving cars
B.There are still many problems to be solved in self-driving cars
C.Lyft co-founder says most of its cars will be autonomous in 5 years
D.The advantages and disadvantages of self-driving cars
参考答案
参考解析
解析：本题考查主旨大意。
【关键词】best title of the passage
【主题句】but on Sunday Lyft threw down the ultimate challenge: A majority of autonomous vehicles for Lyft within a mere five years. 但是在周六，叫车应用“来福”（Lyft）抛出了终极挑战：在仅仅五年后，大部分来福车将是自动驾驶车辆。
【解析】题目意为“文章最好的题目是？”选项A意为“我们需要开发每个人的潜力来实现自动驾驶汽车”，选项B意为“实现自动驾驶汽车还有很多问题需要解决”，选项C意为“Lyft联合创始人说大部分汽车将在五年内实现自动驾驶”，选项D意为“自动驾驶汽车的优缺点”，本篇文章文体是社会新闻类，此类文体往往在开篇抛出新闻事件，同时也是全文的核心内容，因此答案C正确。
【关键词】best title of the passage
【主题句】but on Sunday Lyft threw down the ultimate challenge: A majority of autonomous vehicles for Lyft within a mere five years. 但是在周六，叫车应用“来福”（Lyft）抛出了终极挑战：在仅仅五年后，大部分来福车将是自动驾驶车辆。
【解析】题目意为“文章最好的题目是？”选项A意为“我们需要开发每个人的潜力来实现自动驾驶汽车”，选项B意为“实现自动驾驶汽车还有很多问题需要解决”，选项C意为“Lyft联合创始人说大部分汽车将在五年内实现自动驾驶”，选项D意为“自动驾驶汽车的优缺点”，本篇文章文体是社会新闻类，此类文体往往在开篇抛出新闻事件，同时也是全文的核心内容，因此答案C正确。
更多 “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 cars B.There are still many problems to be solved in self-driving cars C.Lyft co-founder says most of its cars will be autonomous in 5 years D.The advantages and disadvantages of self-driving cars” 相关考题
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考题
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考题
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考题
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考题
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考题
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B.due to
C.lead to
D.contribute to
考题
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考题
资料：“Our cars are for people who want something different.”
This has been the slogan for over 50 years of Suprema Cars, a manufacturer of an English sports car. The car is mostly handmade in the company's factory in northern England. Suprema Car produces approximately 500 cars a year. About 5 years ago, the company began to lose sales and market share, and in the last two years, it has made a loss.
Recently, there have been problems with the labor force. The factory workers have demand higher wages and better working conditions. They are also unhappy because the management is insisting that they increase production, but the workers think this will have a bad effect on the quality of the cars.
The company still has many loyal customers. People buy Suprema sports cars because they are handmade and have an image of quality and craftsmanship.
What kind services does Suprema Cars provide? A.It designs classic car models.
B.It produces hand-made cars.
C.It research and develop car-related technologies.
D.It creates advertisements for the cars.
考题
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.Mr.Zimmer’s idea is that now we are at the critical moment in history, we should take decisive action whether taking the right path or not.
B.Mr Zimmer thinks the introduction of the autonomous vehicles will not cause the unemployment and surely will increase the employment because such car drivers will be needed to provide service.
C.The author has argued that although there are still some problems in Mr. Zimmer’s predication but the general direction of realizing self-driving cars will be correct.
D.Mr.Zimmer provides some variable factors such as companies profits and leagal procedure problems in order to realize the massive transformation of self-driving cars in such a short of time.
考题
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.arrange them neatly
B.present clearly
C.design correctly
D.suggest properly
考题
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 path
B.At almost unprecedented moment in history we should reach our potential to decide whether to take decisive action
C.At almost unprecedented moment history,we should reach our potential to choose the right answers to all the problems encountered by us
D.At almost unprecedented moment in history we should our potential to realize the advent of the era of self-driving cars
考题
high-profile example of（)include autonomous vehicles(such as drones and self-driving cars),creating art(such as poetry)and online assistans(such sa siri).A.internet of thing
B.Cloud computing
C.Big datA
D.Artificial intelligence
考题
What is true regarding Autonomous Systems （AS ）？（）A、AS numbers are assigned by the IANAB、AS numbers are used by BGP （Border Gateway protocol ） to exchange IP routing information with neighboring ASC、In the internet， an Autonomous System （AS） is a collection of IP networks and routers under the controlD、All of the Above
考题
You are managing an Oracle Database 11g database with the following backup strategy：1） On Sunday， an incremental level 0 tape backup is performed.2） Monday through Saturday， a cumulative incremental level 1 tape backup is performed. Which twostatements are true regarding the backups performed（）A、The backup performed in step 1 backs up all blocks that have ever been in use in the database.B、The backup performed in step 2 copies all the blocks changed since the most recent level 0 backup.C、The backup performed in step 1 backs up all the blocks changed since the most recent level 1 backup.D、The backup performed in step 2 backs up all blocks that have changed since the most recent incrementalbackup at level 1
考题
单选题The text suggests which of the following about air pollution?A
Further attempts to reduce emissions from gasoline-fueled vehicles will not help lower urban air-pollution levels.B
Attempts to reduce the pollutants that an individual gasoline-fueled vehicle emits have been largely unsuccessful.C
Few serious attempts have been made to reduce the amount of pollutants emitted by gasoline-fueled vehicles.D
Pollutants emitted by gasoline-fueled vehicles are not the most critical source of urban air pollution.
考题
问答题Practice 8 Think carefully about the issue presented in the following excerpt and the assignment below. We must seriously question the idea of majority rule. The majority grinned and jeered when Columbus said the world was round. The majority threw him into a dungeon for his discoveries. Where is the logic in the notion that the opinion held by a majority of people should have the power to influence our decisions? Adapted from James A. Reed, Majority Rule Assignment: Is the opinion of the majority—in government or in any other circumstances—a poor guide? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from your reading, studies, experience, or observation.
考题
单选题Why do forests in many parts of the world slowly disappear?A
New trees are not looked after properly.B
Many trees have been cut down by man.C
Man has not paid enough attention to planting trees.D
All of the above.
考题
单选题What is true regarding Autonomous Systems （AS ）？（）A
AS numbers are assigned by the IANAB
AS numbers are used by BGP （Border Gateway protocol ） to exchange IP routing information with neighboring ASC
In the internet， an Autonomous System （AS） is a collection of IP networks and routers under the controlD
All of the Above
考题
多选题You are managing an Oracle Database 11g database with the following backup strategy：1） On Sunday， an incremental level 0 tape backup is performed.2） Monday through Saturday， a cumulative incremental level 1 tape backup is performed. Which twostatements are true regarding the backups performed（）AThe backup performed in step 1 backs up all blocks that have ever been in use in the database.BThe backup performed in step 2 copies all the blocks changed since the most recent level 0 backup.CThe backup performed in step 1 backs up all the blocks changed since the most recent level 1 backup.DThe backup performed in step 2 backs up all blocks that have changed since the most recent incrementalbackup at level 1
考题
单选题If remote-controlled cars are more expensive than mechanical cars, and radio-controlled cars are more expensive than remote-controlled cars, which of the following statements must be true?A
Mechanical cars are the most expensive.B
Radio-controlled cars are the most expensive.C
Radio-controlled cars are cheaper than remote-controlled cars.D
Mechanical cars are more expensive than remote-controlled cars.
考题
单选题The author’s attitude toward most European historians who have studied the Saint-Simonians is primarily one of _____.A
approval of the specific focus of their researchB
disapproval of their lack of attention to the issue that absorbed most of the Saint-Simonians’ energy after 1832C
approval of their general focus on social conditionsD
disapproval of their lack of attention to links between the Saint-Simonians and their American counterparts
考题
问答题Practice 3 Energy-saving vehicles were part of the Green Transportation Festival in the US in 2003. The vehicles shown were designed to reduce America’s dependence on oil and help the environment. There are exhibits of cars and buses at the festivals. Most of them use little gas or use another kind of fuel such as natural gas. People are also urged to consider simpler ways of getting around, such as walking, biking and using public transportation systems. The United States has less than five per cent of the world’s population, but uses about twenty-five per cent of the world’s oil. More than half of the nation’s oil is imported. Most of it goes to transportation. Festival organizers said progress in technology was making it possible for Americans to reduce their dependence on oil. That is because the kinds of energy-saving vehicles are increasing. Efforts to reduce oil imports in the United States would also have important environmental benefits. The burning of oil as fuel is responsible for gases blamed for climate change. When gasoline is burned in cars, it also pollutes the air. This leads to many health problems.
考题
问答题The emergence of the Uber digital tide finder and the regulation questions it tends to raise have inspired debates, protests and supports around the world. The following are comments on legalization of ride-hailing service both from officials and ordinary citizens. Read the excerpts carefully and write your response in about 300 words, in which you should: 1. summarize briefly the comments from both sides; 2. give your comment. Marks will be awarded for content relevance, content sufficiency, organization and language quality. Failure to follow the above instructions may result in a loss of marks.Government Authorities Maranda Gibson, a representative from Los Angeles Department of Transportation: The drivers for Uber are not required to pass background checks or have their vehicles inspected for safety. They don’t have to pay the same taxes, insurance fees and licensing fees that taxi drivers do. While taxi drivers go through an extensive training course called “the Knowledge”, where drivers must learn 320 routes covering 25,000 streets, as well as important buildings and points of interest, Uber drivers can come straight with a car and GPS. Boris Johnson, a British politician: I have sympathy for taxi drivers, but it would be “difficult” for the government to ban Uber. We’ve gone to the high court to get a ruling on this, and the issue is basically: is the driver’s mobile in the cab equivalent to a taxi meter? I can see why my learned friends might think that it is, because it’s receiving data about, or it’s calculating, the distance and time and the fare. And there are other lawyers who say that it isn’t, and that was the advice of the counsel to Transport for London. And so we’ve got a legal problem.Ordinary Citizens Mary Williams: I think as long as the Uber drivers have the necessary background checks done (they don’t have any warrants, are not reckless drivers, and are properly insured) then they should be allowed to offer their services. The transportation market is changing as it should with technology. I think it’s great that Uber users are able to see their driver’s ratings and can hail them quicker than they can get a cab. It’s just a different way of doing business. Matthew Yglesias: I think it’s pretty obvious that Uber does in fact need to be regulated. And regulated pretty heavily. After all, here’s the business: You’ve got people cruising around cities in medium sized metal boxes capable of traveling at high speeds and powered by burning gasoline. Left unregulated, these vehicles would poison the air and crush huge numbers of innocent pedestrians. Which is why it’s good that the federal government regulates what kind of automobiles are considered safe to drive and regulates what kind of vehicle emissions are acceptable, and it’s why state and local governments regulate both who is allowed to drive cars (with driver’s licenses), under what circumstances (with drunk driving laws), and of course what you’re allowed to do with a vehicle (with road rules). These are important things for the government to do. Daniel Tencer: The regulatory issue around Uber is whether the rules governing rides-for-hire need to be drastically different than the rules governing driving-yourself-around. But you don’t need rules that specifically discriminate against rides for hire. Anything you want to do around driving yourself is presumptively legal, and you want to do around hiring someone else to drive you is presumptively illegal. But by all means, regulate cars-for-hire, just regulate them the same way you regulate the other cars.
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