Artificial intelligence, or AI in short, is the science of giving computers and machines ability to think and work like humans. AI scientists and engineers have made a lot of cool technologies. AI is 题目和参考答案——青夏教育精英家教网—

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Artificial intelligence（人工智能）, or AI in short, is the science of giving computers and machines ability to think and work like humans. AI scientists and engineers have made a lot of cool technologies. AI is rapidly catching up with the human ability to read faces. As a result, facial recognition（面部识别）is used a lot in the world. Chinese police use this technology to identify criminals（罪犯）.Once they caught a criminal when he attended a concert. It also checks the ID of ride-hailing（网约车）drivers and lets people pay for things with a smile.

AI is also used in self-driving cars, which are believed to be the future of driving. Most drivers may wave or nod at passers-by to let them cross the street, but self-driving cars don't have this ability. Carmakers are testing a light signal system to help them "speak" to humans. The system can show what self-driving cars will do. For example, if a driverless car is yielding（让路）, it will flash two white lights side to side. A rapidly flashing light tells passers-by that the car is about to speed up.

Service Robots also show you how powerful AI is. Imagine this—you come back home from school and your robot housekeeper is waiting for you at the door. After dinner, he teaches you to play the piano, just like a real music teacher. Such thoughts will soon happen in the real world. In the future, more and more service robots will become good home helpers. AI is so powerful that it can help human beings and even replace us in many jobs.

1.What does the underlined word "identify" mean in Paragraph 2 probably mean?

A.To let somebody know his mistakes.

B.To come to realize and tell who is who.

C.To take somebody to the police station.

D.To tell somebody something important.

2.According to the passage, what is facial recognition used for?

A.Driving cars. B.Making people smile.

C.Calling the police. D.Checking people's information.

3.Which technology has been used in real life according to the passage?

A.Service Robots at school. B.Robots as ride-hailing drivers.

C.Facial recognition for payment. D.Light signals for self-driving cars.

4.According to the passage, how many ways can AI be used in the future?

A.One. B.Two C.Three D.Four.

5.What can we learn from the passage?

A.People use AI in many different ways.

B.AI will take the pace of human beings in all jobs.

C.Self-driving cars will be able to talk like humans.

D.A criminal was caught for inventing facial recognition.

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How could we tell time if there were no watches or clocks anywhere in the world?

The sun might be the world's first “clock”, except in the far north, where the Eskimos（爱斯基摩人）live. There, it's dark most of the winter, and light most of the summer. But in most of the world, if you don't have a clock that shows time, you still know that when the sun shines, it's day, and when it's dark, it's night. The sun can not only tell you whether（是否）it's day or night but also it's morning, noon, or afternoon. When the sun is almost directly（恰好）overhead, it's noon.

People who live near the sea learn from the tides. In the daytime, for about six hours, the water rises higher and higher on the beach. And then it goes down and down for about six hours. The same thing happens again at night. There are two high tides and two low tides every 24 hours.

Seamen on a ship know time by looking at the moon and the stars. The whole sky is their clock.

In some places in the world the wind comes up at about the same time every day or changes direction or stops blowing. In these places the wind can be the clock.

A sand clock is an even better clock. If you had fine dry sand in a glass like the one in the picture, you would have what is called an hourglass. The sand in the hourglass goes from the top part to the bottom part in one hour. When the hourglass is turned over, the sand will take another hour to go back again.

1.From the passage we can know there are_____ ways to tell time except the clock and watch．

A.3 B.4 C.5 D.7

2.The Eskimos in the far north can't use the sun for a clock because _______.

A.they know very little about the sun

B.the sun there never goes down in winter

C.it's too cold for them to go out to watch the sun

D.it has long days during summers and long night during winters

3.The underlined word "tides" in the passage means_______.

A.洋流 B.潮汐 C.海啸 D.波浪

4.Which page of the newspaper may this passage be in?

A.News B.Science C.Advertisement. D.Sports.

5.What's the best title for the passage?

A.Different Ways to Tell Time B.How the Clock Was Invented

C.The Development of the Clock D.A Useful Machine to Tell Time

Could you tell me ?

A.what do I need to care about B.what they are talking with Mr. Li

C.why he hates to be like others D.if he is good enough to go out of hospital

-Can you show me _______ to use this kind of camera?

-Sorry, I don't know, _______.

A.how; either B.what; too

C.how; too D.what; either

―Are you going to have a part-time job during the summer vacation?

―Yes. I think I shouldn't always my parents since I've grown up.

A.fight against B.talk with C.hear from D.depend on

Students often ________ books from the library and can ________ them for a week.

A.lend; keep B.borrow; keep C.borrow; lend D.keep; borrow

A: I went to Tokyo last summer vacation.

B: How long________you________there?

A: For three weeks.

A.have, stayed B.would, stay C.had, stayed D.did, stay

An English teacher should _________ grammar points to his students in patience.

A.enclose B.expect C.enjoy D.explain

When a leafy plant is under attack, it doesn’t sit quietly. Back in 1983,two scientists,Jack Schultz and Ian Baldwin,reported that young maple trees getting bitten by insects send out a particular smell that neighboring plants can get. These chemicals come from the injured parts of the plant and seem to be an alarm.What the plants pump through the air is a mixture of chemicals which are called VOCs for short.

Scientists have found that all kinds of plants give out VOCs when being attacked .It’s a plant’s way of crying out.But is anyone listening？Exactly.Because we can watch the neighbours react.

Some plants release smelly chemicals to keep insects away.But others do double duty .They pump out perfumes designed to attract different insects who are natural enemies to the attackers.Once they arrive,the tables are turned .The attacker who was lunching now becomes lunch.

In study after study,it appears that these chemical conversations help the neighbors .The damage is usually more serious on the first plant,but the neighbors ,relatively speaking ,stay safer because they heard the alarm and knew what to do.

Does this mean that plants talk to each other？ Scientists don’t know. Maybe the first plant just made a cry of pain or was sending a message to its own branches, and so, in effect, was talking to itself. Perhaps the neighbors just happened to “overhear” the cry. So information was exchanged, but it wasn’t a true communication.

Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate(亲密的) than the world we can see and hear. Our senses are weak. The world is .

1.Does a leafy plant sit quietly when it is under attack?

2.What does a plant do when it is under attack?

3.How can scientists know that there is someone listening to the crying?

4.What does the author mean by “the tables are turned” in paragraphs 3?

5.From the scientists' studies, can plants protect themselves against insects or really talk to each other?

6.What can be filled in the blank at end of the passage?

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