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¡¾1¡¿It makes sense in any circumstance to hold onto principle and distinguish right from wrong.

¡¾2¡¿More and more people in developing countries can earn more than 1.9 dollars a day, which indicates they are living above the extreme.

¡¾3¡¿The pictures posted on Wechat Moments often make people envy their friends¡¯ lives very much, but their real lives might not be as attractive as the pictures showed us.

¡¾4¡¿At the moment of graduation from Senior High School, recalling the past, we cannot be too grateful to teachers for their guidance, to classmates for their help and to the school for her tolerance.

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Driverless cars used to be the sort of thing you¡¯d see in sci-fi films, but in 2020 they¡¯re becoming a reality. Autonomous car technology is already being developed by the likes of Lexus, BMW and Mercedes, and we¡¯ve even tested Tesla¡¯s driverless Autopilot system on UK roads. Across the Atlantic, Google is developing its automated technology in the wild, and Apple is rumoured to be working with BMW on its own-probably automated-car.

Fully-driverless tech is still at an advanced testing stage, but partially automated technology has been around for the last few years. Executive saloons like the BMW 7 Series feature automated parking, and can even be controlled remotely.

With so much investment and interest in driverless technology, it¡¯s easy to assume that self-operating cars are likely to happen soon, but they¡¯re much further away than we might think. Before driverless vehicles go to market widely, manufacturers must deal with a range of technical and ethical challenges, and prevent the biggest threat to autonomous technology: humans.

The human problem

Humans present problems for autonomous cars as both drivers and pedestrians, and dealing with our unpredictable behaviour represents a significant challenge for the technology.

The Google Car is one of the most experienced autonomous vehicles. Even so, its interaction with human drivers has given rise to the exposure of one of driverless cars¡¯ main weaknesses. The first injury involving the Google Car wasn¡¯t due to a fault in its system, but human-error. While correctly waiting at traffic lights, Google¡¯s self-driving car was hit by an inattentive driver and, in spite of its sophisticated array (¸´ÔÓ¾«ÃܵÄÊý×é) of sensors, there was little it could do to avoid the incident. Luckily, the accident only resulted in minor injury for a few of the passengers, but it¡¯s a reminder that autonomous cars are at risk when surrounded by human road users.

Despite their sophisticated systems, self-driving cars currently have no plan B for human road users. Human drivers are able to interact with each other and make allowances, but also make countless, small mistakes when driving-mistakes to which current self-driving cars simply can¡¯t adapt.

Dealing with pedestrians

The way human drivers interact with pedestrians raises difficult moral and ethical questions for car manufacturers-with implications.

Autonomous cars need to understand the way pedestrians behave, while also imitating the behaviour they¡¯d expect from a human driver. ¡°Everyone has a knowledge of how a human being is going to react, because we are all human beings,¡± says computer ethics commentator Ben Byford. ¡°So if you walk out in front of a car, and presumably the car driver knows you¡¯re there, they¡¯re going to react in a certain way.¡±

¡° If I walked out in front of a Google car travelling at 60mph, I have no real knowledge of how the vehicle will behave, so I¡¯m effectively putting myself in danger.¡±

How ¡¾1¡¿ away are we from autonomous cars?

Background information

¡ñ Autonomous car technology has been ¡¾2¡¿ in some famous car manufacturers.

¡ñ Partially automated technology has been in ¡¾3¡¿ for the last few years.

¡ñ Before our roads are ¡¾4¡¿ with driverless vehicles, manufacturers have a lot of things to do.

¡¾5¡¿ about the autonomous technology

The human problem

¡ñ The Google car¡¯s accident has ¡¾6¡¿ one of driverless cars¡¯ weaknesses.

¡ñ ¡¾7¡¿ the sophisticated array of sensors, Google¡¯s self-driving car could do little to avoid the accident.

¡ñ With no alternative plan, self-driving cars cannot have a good ¡¾8¡¿ with human drivers.

Dealing with pedestrians

¡¾9¡¿ human drivers who know pedestrians well, autonomous cars have difficulty in ¡¾10¡¿ their behavior, thus putting pedestrians in danger.

¡¾ÌâÄ¿¡¿ Over a four-year period, Swiss researchers have developed a machine that can keep human livers (¸Î)alive outside of the body for one week.

Livers are among the most commonly transplanted (ÒÆÖ²)human organs. Current technology can only keep human livers alive for up to 24 hours. It is reported that, in 2017, about 8.000 liver transplants were performed in the U.S., of which 360 used livers from living givers In addition, about 11,500 people were registered on a waiting list to receive a liver transplant. Keeping livers alive and functioning for longer periods could greatly improve the chances of survival for patients.

The researchers say the purpose of their ¡°Liver4Life¡± machine is to perform what they call liver perfusion (¹à×¢)operations outside of the human body. Perfusion is the process by which blood or other liquids are pumped through organs and tissue. The machine keeps the liver at the right temperature and moves it in a way that would be natural in the body. Using a pump to fill the liver with blood acting like a human heart, the machine also provides oxygen to the organ, controls red blood cell levels and removes waste.

The research team began their experiments with livers from pigs. After repeated testing and engineering development, they succeeded in getting the pig livers to survive for seven days with support only provided from the Liver4Life machine. They also discovered the system can work to repair damaged livers. The team is now planning its next step to transplant machine-treated organs into patients.

Pierre-Alain Clavien. leader of the research said in a statement. ¡°This technology will greatly increase the number of livers available for transplant, improving the chances of survival for patients. The success of this unique machine opens the way for many new applications in transplantation and cancer medicine.¡±

¡¾1¡¿What does the author intend to do in paragraph 2?

A.Introduce a brand new topic for discussion.

B.Provide some latest data about present liver transplants.

C.Show the urgency of tech improvement in liver transplants.

D.Remind readers concerned of the importance of a healthy liver.

¡¾2¡¿What does the underlined word ¡°it¡± in paragraph 3 refer to?

A.The machine.B.The liver.

C.The temperature.D.The tissue.

¡¾3¡¿What can we learn about the Liver4Life machine?

A.It is among the most commonly used machines for liver transplants.

B.It is aimed to carry out liver perfusion operations in the human body.

C.It can perform several functions to keep the liver working normally.

D.It can be used to keep the pig livers alive for more than one week.

¡¾4¡¿Where is this text most likely from?

A.A biology textbook.B.A first aid brochure.

C.A social web page.D.A health magazine.

¡¾ÌâÄ¿¡¿ Algorithms (Ëã·¨) affect nearly every part of a person's experience on the Internet. Search engines are most people' s entry to the Internet.If a person wants to find information about something, they usually start with a search bar.As soon as they start typing or choosing links,the algorithm starts gathering data about every choice users make and uses that data to try to find the websites or information that most directly relate to what the user is looking for.

The problem with algorithm is that they can limit the kinds of information people see,says MacMillan,a reading researcher with Project Information Literacy (ÄÜÁ¦). He argues this can be harmful to people's critical thinking and lead them to believe that only one point of view is correct.

Companies also pay to post advertisements for products that could relate to users' search data. For example,if you search for places to take a vacation,you will likely start to see ads for travel companies, flights or hotels.

Renee Hobbs, director of the Media Education Lab at the University of Rhode Island, however, argues that algorithms are not all bad. She says search engine algorithms can help you find what might be the most useful information faster. But she says it is in the interests of Internet companies to keep users on the Internet for as long as possible so they see more ads.

The current generation of young people grow up using the Internet and they are prone(Ò×ÓÚÔâÊÜ) to distrustful information.That is why schools must train students how to use the Internet more wisely in their Studies.It is the duty of education to keep students informed about the world around them. Yet it is not the duty of education alone. And lawmakers should consider increasing data protection rules. Individuals can also use a wide variety of websites to avoid algorithmic controls.

¡¾1¡¿How do algorithms affect users' Internet experience?

A.They lead to slower Internet connection.

B.They block ads for users automatically.

C.They always help users get reliable links.

D.They determine the content users receive.

¡¾2¡¿What is Hobbs' attitude to algorithms?

A.Doubtful.B.Supportive.

C.Objective.D.Indifferent.

¡¾3¡¿What can be concluded from the last paragraph?

A.Young people fall victim to the Internet.

B.Data protection rules are already enough.

C.Education is fully responsible for algorithmic controls.

D.Joint efforts are needed to handle algorithmic controls.

¡¾4¡¿Which column of a magazine is the text most likely from?

A.Science.B.Entertainment.

C.Advertisement.D.Fashion.

¡¾ÌâÄ¿¡¿ People have been told to stay separated ¡ª at least six feet apart¡ª and to practice what state and local officials call ¡°social distancing¡±. Some have been asked to work at home. But as people try to slow the spread of the novel coronavirus£¨ ÐÂÐ͹Ú×´²¡¶¾£©, the resulting chaos and fear are bringing both large and small communities closer.

Simple acts of kindness are sprouting up online and in public, as neighbors, students, teachers, and others begin to connect those who can pass this long and isolating time smoothly, and the people who may not have the means to get through.

For Jesse Farren-James, helping out has taken the form of organizing trips to the

supermarkets for supplies, and use of her membership card if anyone needs to buy large quantities. She posted the offer in a Facebook group for the community residents, and some people came and turned to her. ¡°I just feel so lucky that I have so many people in my life to rely on and so sad that not everyone has that,¡± she wrote in the group. In another interview, Farren-James said the ¡°community is coming together" and ¡°there are so many good and amazing people¡± offering to help where they can.

Also, parents in Dorchester have gathered together online. In a Facebook group called DotParents, parents have been raising money to buy food and supplies for students and families in the community. Lisa Graustein has been organizing this activity. On Thursday, she used the more than $2,000 raised by neighbors to purchase food in a restaurant supply company. A group of volunteers packed the food and planned to distribute to schools for those who may need it.

¡°Food shortage is real in our city and this crisis is going to be severe.¡± Graustein said. ¡°But here's something we can do that deal better with the hard time¡±. This idea is spreading. She said friends in four other states had being running similar campaigns. Next, she wants to find a way to get landlords to temporarily abandon rent for residents in financial difficulties because of the outbreak.

¡¾1¡¿The underlined phrase in paragraph 2 ¡°sprouting up¡± can be best replaced by .

A.DisappearingB.Growing

C.ConnectingD.Helping

¡¾2¡¿What do we know about Jesse Farren-James?

A.She is a shopping assistant working for a supermarket.

B.She is wealthy and always ready to help others.

C.She lent her membership card to the people in need.

D.She felt sad that not everyone has enough food.

¡¾3¡¿What did parents in Dorchester do to offer help?

A.They bought food from the supermarket for community children.

B.They set up a restaurant supply company to provide food.

C.They raised money to deal with food shortage.

D.They distributed money to community residents.

¡¾4¡¿Which is the best title for this passage?

A.Acts of kindness in coronavirus outbreak

B.Effects of social media in coronavirus outbreak

C.Social distancing in the online community

D.Helping each other in financial difficulties

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