The disappearance of dinosaurs is not necessarily caused by astronomical incidents. But explanations are hard to find.A.alternative B.aggressive C.ambiguous D.apparent 题目和参考答案——青夏教育精英家教网—

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The disappearance of dinosaurs is not necessarily caused by astronomical incidents. But _________explanations are hard to find.

A.alternative B.aggressive C.ambiguous D.apparent

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In 2017, AlphaGo defeated Chinese player Ke Jie to become the world’s No 1, ending thousands of years of human dominance（控制）in the game. AlphaGo is an artificial intelligence（AI）Go-playing program.1.

Artificial intelligence（AI）is usually defined as the science of marking computers do things that require intelligence when done by humans.2.These include learning, reasoning, problem-solving, perception, and language-understanding.

3.In fact we are increasingly depending. upon computer-based artificial intelligence. As Charlie Qrtiz said, head of AL at the Massachusetts-based software company Nuance Communication, “It has opened a window for us.”Smartphones, self-driving cars, intelligent robots，etc. are constantly coming into our life. According to a recent survey, half of the world’s AI experts believe human level machine intelligence will be achieved by 2040. This will open up huge possibilities for the enrichment of mankind, from tackling climate change and treating disease to labour- saving devices.

4.Physicist Stephen Hawking last year warned that unless we take care, board games might be the least of it. “The development of full artificial intelligence could mean the end of the human race.”5.They believe AlphaGo’s victory is a reminder of how fast the world is overcoming the obstacles in the way of AI, and its distribution in the world about us. Although there may yet be no evidence that computers will ever shake off their human masters, we should still treat these development with the humility and caution they deserve.

A. Other scientists have also expressed the concern.

B. Artificial intelligence has both advantages and disadvantages.

C. Defeating a human Go master is not the only thing AI can do.

D. Artificial intelligence will bring us disasters instead of benefits.

E. It was designed by an American Artificial intelligence company.

F. Not all experts hold the optimistic attitudes to the development of AI.

G. Research in AI has so far focused on some special fields of intelligence.

根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Every animal sleeps, but the reason for this has remained foggy. When lab rats are not allowed to sleep, they die within a month. 1

One idea is that sleep helps us strengthen new memories. 2 We know that, while awake, fresh memories are recorded by reinforcing (加强) connections between brain cells, but the memory processes that take place while we sleep have been unclear.

Support is growing for a theory that sleep evolved so that connections between neurons(神经元) in the brain can be weakened overnight, making room for fresh memories to form the next day. 3

Now we have the most direct evidence yet that he is right. 4 The synapses in the mice taken at the end of a period of sleep were 18 per cent smaller than those taken before sleep, showing that the connections between neurons weaken while sleeping.

If Tononi’s theory is right, it would explain why, when we miss a night`s, we find it harder the next day to concentrate and learn new information — our brains may have smaller room for new experiences.

Their research also suggests how we may build lasting memories over time even though the synapses become thinner. The team discovered that some synapses seem to be protected and stayed the same size. 5 “You keep what matters,” Tononi says.

A. We should also try to sleep well the night before.

B. It’s as if the brain is preserving its most important memories.

C. Similarly, when people go for a few days without sleeping, they get sick.

D. The processes take place to stop our brains becoming loaded with memories.

E. That’s why students do better in tests if they get a chance to sleep after learning.

F. “Sleep is the price we pay for learning,” says Giulio Tononi, who developed the idea.

G. Tononi’s team measured the size of these connections, or synapses, in the brains of 12 mice.

—______ that company to see how they think of our product yesterday?

—Yes. They are happy with it.

A. Did you call B. Have you called

C. Will you call D. Were you calling

A new commodity brings about a highly profitable, fast-growing industry,urging antitrust（反垄断）regulators to step in to check those who control its flow. A century ago, the resource in question was oil. Now similar concerns ares being raised by the giants（巨头）that deal in data, the oil of the digital age. The most valuable firms are Google, Amazon, Facebook and Microsoft. All look unstoppable.

Such situations have led to calls for the tech giants to be broken up. But size alone is not a crime. The giants’ success has benefited consumers. Few want to live without search engines or a quick delivery. Far from charging consumers high prices, many of these services are free (users pay, in effect, by handing over yet more data). And the appearance of new-born giants suggests that newcomers can make waves, too.

But there is cause for concern. The internet has made data abundant, all-present and far more valuable, changing the nature of data and competition. Google initially used the data collected from users to target advertising better. But recently it has discovered that data can be turned into new services: translation and visual recognition, to be sold to other companies. Internet companies’ control of data gives them enormous power. So they have a “God’s eye view” of activities in their own markets and beyond.

This nature of data makes the antitrust measures of the past less useful. Breaking up firms like Google into five small ones would not stop remaking themselves: in time, one of them would become great again. A rethink is required—and as a new approach starts to become apparent, two ideas stand out.

The first is that antitrust authorities need to move form the industrial age into the 21st century. When considering a merger(兼并), for example, they have traditionally used size to determine when to step in. They now need to take into account the extent of firms'data assets(资产) when assessing the impact of deals. The purchase price could also be a signal that an established company is buying a new-born threat. When this takes place, especially when a new-born company has no revenue to speak of, the regulators should raise red flags.

The second principle is to loosen the control that providers of on-line services have over data and give more to those who supply them. Companies could be forced to consumers what information they hold and how many money they make form it. Govemments could order the sharing of certain kinds of data, with users' consent.

Restarting antitrust for the information age will not be easy But if govemments don't wants a data oconomy by a few giants, they must act soon.

1.Why is there a call to break up giants?

A. They have controlled the data market

B. They collect enormous private data

C. They no longer provide free services

D. They dismissed some new-born giants

2.What does the technological innovation in Paragraph 3 indicate?

A. Data giants’ technology is very expensive

B. Google’s idea is popular among data firms

C. Data can strengthen giants’ controlling position

D. Data can be turned into new services or products

3.By paying attention to firms’ data assets, antitrust regulators could .

A. kill a new threat B. avoid the size trap

C. favour bigger firms D. charge higher prices

4.What is the purpose of loosening the giants’ control of data?

A. Big companies could relieve data security pressure.

B. Governments could relieve their financial pressure.

C. Consumers could better protect their privacy.

D. Small companies could get more opportunities.

Only five years after Steve Jobs’ death ,smart-phones defeated _________PCs in sales.

A.controversial B.contradictory

C.confidential D.conventional

__________not for the support of the teachers,the student could not overcome her difficulty.

A.It were B.Were it C. It was D. Was it

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者(从第11处起)不计分。

Dear Peter,

How times flies! It had been almost a year since you left China to Sweden. During your home stay at my home, we had such wonderful time that it seemed as if everything had been happened yesterday. I have been long to hear all about you and missing you so much. Fortunate, I was selected as one of the student representative to pay a visit to your school. The visit will last on July 7th to 20th. And as a super soccer fan, I’d really love to visit our local soccer club.

I can’t wait for the day to come where I can see you.

Yours,

Li Hua

How Can I Fight Laziness?

Lazy people will never amount to anything in life. However, laziness can be defeated once a few changes have been made in your mind.

1.. Many people lack sleep constantly, since they stay up too late and get up too early to prepare for work. These people have little motivation once they arrive home. Laziness works hand in hand with a lack of motivation and a tendency to put off things. By adjusting your sleep schedule to provide a few more hours of meaningful rest, you can fight laziness throughout the day.

Another way to fight laziness is to change your mind from passive to active. Some people treat their lives as if they were pushed from task to task. Others take a more proactive（主动的） approach, viewing each task as a challenge they must overcome alone. 2.

Some people fight laziness by removing the temptations(诱惑) that surround them. A television in the living room may provide entertainment, but watching too much TV often contributes to laziness. 3.Complete a few tasks and reward yourself with what you enjoy, such as a good dinner or a film.

Laziness can also be a lasting problem at home. Couples and children may all have different energy levels, but laziness can be spread if not dealt with immediately. 4. Be the first to collect and wash dishes after a meal. Others in the home may eventually follow your example and perform their own task. It is difficult to practice laziness when you are surrounded by motivated people.

5. Enough exercise and a balanced diet can help you to develop a healthy lifestyle, thus enabling you to have more energy and help lift your spirits.

A．To fight family laziness, set an example.

B．One way to fight laziness is to get enough sleep.

C．Knowing how to fight laziness is important.

D．Finally, taking exercise regularly can help you fight laziness.

E. With strong determination, you will be able to achieve your goal.

F. Create a reward system for yourself, just as parents do for a child.

G. Laziness sets in when you no longer feel in charge of your own life.

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