When he was alive, the old scientist used to ...

When he was alive, the old scientist used to say that knowledge ____ from practice and he gained his experience by doing a lot of practical work.

高三英语单项填空简单题查看答案及解析

The old scientist used to say that knowledge ______ from practice．

A．was coming    B．comes

C．had come    D．would come

高三英语单项填空中等难度题查看答案及解析

Scientists say they have developed a system that uses machine learning to predict when and where lightning will strike. Researchers report the system is able to predict lightning strikes up to 30 minutes before they happen within a 30-kilometer area.

Lightning is a strong burst of electricity in the atmosphere. Since it carries an extremely powerful electrical charge, it can be destructive and deadly. European researchers have estimated that between 6,000 and 24,000 people are killed by lightning worldwide each year. For this reason, climate scientists have long sought to develop methods to predict lightning.

The system tested in the experiments uses a combination of data from weather stations and machine learning methods. The researchers developed a prediction model that was trained to recognize weather conditions that were likely to cause lightning.

The model was created with data collected over a 12-year period from 12 Swiss weather stations in cities and mountain areas. The data, related to four main surface conditions: air pressure, air temperature, relative humidity and wind speed, was placed into a unique machine learning algorithm (算法), which compared it to records of lightning strikes. Researchers say the algorithm was then able to learn the conditions under which lightning happens.

The researchers test-ran the system several times. They found that the system made predictions that proved correct almost 80 percent of the time. “It can now be used anywhere,” the Swiss Federal Institute of Technology said in a statement.

The researchers plan to keep developing the technology in partnership with a European effort that aims to create a lightning protection program. The effort is called the European Laser Lightning Rod project. Scientists working on the project are experimenting with a laser technology that could someday control lightning activity, transferring lightning charges from clouds to the ground. They hope that such technology can one day be used as protection against lightning strikes. Possible uses could be at stations, airports or places where large crowds gather.

1.Why was the system developed?

A.To meet kids’ curiosity about lightning.

B.To show the power of lightning.

C.To keep track of lightning deaths.

D.To protect people from lightning.

2.What is special about the system?

A.It was based on a number of samples worldwide.

B.It adopted a different machine learning algorithm.

C.It used an effective method of collecting data.

D.It required low cost of predicting lightning.

3.What will the researchers do next with the laser technology?

A.Monitor lightning activity. B.Prevent the occurrence of lightning.

C.Direct energy from lightning. D.Generate electricity with lightning.

4.What can be a suitable title for the text?

A.A System of Controlling Lightning B.A Method of Forecasting Lightning

C.A Theory of Employing Lightning D.A Model of Creating Lightning

高三英语阅读理解中等难度题查看答案及解析

Scientists say they have developed a system that uses machine learning to predict when and where lightning will strike. The research was led by engineers from the Swiss Federal Institute of Technology in Lausanne, Switzerland.

Lightning is a strong burst of electricity in the atmosphere. It can strike between clouds or between a cloud and the ground. Since lightning carries an extremely powerful electrical charge, it can be destructive and deadly. It is difficult to know exactly how many people die of lightning-related causes. European researchers have estimated that between 6,000 and 24,000 people are killed by lightning worldwide each year. The strikes can also cause power failure, destroy property, damage electrical equipment and start forest fires.

For this reason, climate scientists have long sought to develop methods to predict and control lightning. The system tested in the experiments uses a combination of data from weather stations and machine learning methods. The researchers developed a prediction model that was trained to recognize weather conditions that were likely to cause lightning. The model was created with data collected over a 12-year period from 12 Swiss weather stations in cities and mountain areas. The data related to four main surface conditions: air pressure, air temperature, relative humidity (湿度) and wind speed. The atmospheric data was placed into a machine learning algorithm (计算程序), which compared it to records of lightning strikes. Researchers say the algorithm was then able to learn the conditions under which lightning happens.

“Once trained, the system made predictions that proved correct almost 80 percent of the time,” the Swiss Federal Institute of Technology said in a statement. “It can now be used anywhere.”

Amirhossein Mostajabi, a PhD student at the institute, said current systems for gathering such data are slow and complex and require costly collection equipment like radar or satellites. “Our method uses data that can be obtained from any weather station,” he said. “This will improve data collection in very remote areas not covered by radar and satellite or in places where communication systems have been cut,” he added.

The researchers plan to keep developing the technology in partnership with a European effort that aims to create a lightning protection system. Scientists working on the Paris-based project are experimenting with a laser technology that could someday control lightning activity. The idea is that powerful, ground-based lasers can be positioned in the sky to direct energy from lightning.

1.What does Paragraph 2 mainly focus on?

A.The cause of lightning. B.The forming process of lighnting.

C.The destruction of lightning. D.The difficulty to count the deaths.

2.Which is the correct order of how the system works?

① develop a prediction model.

② learn to recognize weather conditions.

③ collect related data.

④ input the data onto the computer.

⑤ make predictions.

A.①→②→③→④→⑤ B.③→④→①→②→⑤

C.①→②→④→③→⑤ D.③→①→②→⑤→④

3.What’s the Swiss Federal Institute of Technology’s attitude toward the system?

A.Satisfied. B.Doubtful.

C.Negative. D.Neutral.

4.The advantage of the new system for collecting data lies in its　　　　 .

A.accuracy B.efficiency

C.wide coverage D.reliability

5.What does the Paris-based project aim to do?

A.Identify lighting. B.Predict lighting.

C.Stop lighting. D.Control lighting.

高三英语阅读理解中等难度题查看答案及解析

When my mother was alive, she used to tell me again and again about the value of just being nice. “Never underestimate（低估）the power of a smile,” she would say. I fear she would be very disappointed looking at the world today. A lot of people don’t smile and when it comes to service today, they’re just not nice. Now don’t give me wrong, not all service workers but a good many.

I was on the phone the other day with a computer help desk. First a man, then later a woman, who couldn’t have been ruder. And this to a customer, who didn’t know his way around a PC. But no matter, I could tell they thought I was a bother, The woman, in fact, seemed to be chewing gum as she unemotionally clicked off a series of commands for me to perform.

The next day I heard from a friend of mine who got a performance review without his boss once looking up at him. Not once.

You see it everywhere. Gone are the days when people cared about you. It’s a sign of the time, I suspect. But that makes me sad — for them and for us all. People who aren’t happy, who don’t smile, who don’t kid, who don’t joke or make light of even bad situations, make for an even worse situation.

And it spreads like a cancer. Someone’s rude to you, you’re rude to them and to the next fellow you meet, and on and on. Smiles are contagious（易感染的）but so annoyances. The boss who can’t be bothered with his workers. The celebrity who can’t be bothered with her annoying fans.

You know, my mom used to judge presidential candidates by how they smiled. I would say, “But mom, you don’t know if that smile is real.”

“Oh, yes I do,” she would tell me. “I can feel it.”

It’s in their eyes, she would say. And it’s in their smile. The rest just kind of falls into place.

1.Why did the writer mention his phone call?

A. To prove his mother is wrong.

B. To show many people aren’t nice.

C. To tell us he knows little about computer.

D. To share his funny experience with us.

2.What is the author’s attitude towards the boss of his friend?

A. Opposed.　　　　 B. Doubtful.

C. Respectful.　　 D. Supportive.

3.When someone is rude to you, you’re advised to ________.

A. be rude to the next person

B. be nice to the people you meet

C. become one just like him or her

D. make for a worse situation

4.What’s the best title of the passage?

A. The power of a smile

B. Don’t judge a person by his look

C. The effect of rudeness

D. Feel a person in his eyes

高三英语阅读理解中等难度题查看答案及解析

Scientists say they now have proof to support the old-fashioned advice that it’s best to sleep on a problem．They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day．

The lead researcher Bob Stickgold at the Harvard Medical School said, “Sleep helps us draw rules from our experiences．It’s like knowing the difference between dogs and cats even if it’s hard to explain．”

The US research team studied how well students remembered connections between words and symbols, reports New Scientist．They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept．They found that people were better able to remember lists of related words after a night’s sleep than after the same time spent awake during the day．They also found it easier to remember themes that the words had in common．But they forgot around one in four more themes if they had been awake．

Prof．John Groeger, of Survey University’s Sleep Research Centre, said, “People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative （促使康复的）value．”

“We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with them all．”

1.The phrase “to sleep on a problem” in Paragraph 1 most likely means “________”．

A．to pay full attention to a problem

B．to wait until the next day for a decision

C．to sleep to forget a problem

D．to have difficulty in sleeping

2.In the study by the US research team, students were asked to ________．

A．put together words of similar meanings

B．remember words and their meanings

C．show their knowledge of words

D．make up lists of related words

3.Which of the following may be easier to remember?

A．Themes learned right before the test．

B．Rules from personal experiences．

C．Words learned before a good sleep．

D．Ideas stored together in the brain．

4.What may be the importance of the research?

A．It shows that sleep may help us manage information．

B．It helps find out the common themes of words．

C．It tells us that more sleep can improve health．

D．It proves the value of old-fashioned advice．

高三英语阅读理解中等难度题查看答案及解析

That old saying “Never say never” came to mind when I read that Harper Lee, the author of the beloved, Pulitzer Prize-winning novel, To Kill a Mockingbird, has a new book coming out in July, 2015—55 years after Mockingbird was published! The very private Ms. Lee had never followed up her highly praised first book, with a second novel. Instead, she’s following it up with a first novel. Confused? So was I! Allow me to explain.

Go Set a Watchman, was actually written before that classic volume. In the mid-1950s, Lee had completed Watchman, which features Scout Finch as a young woman from Alabama living in New York. The story follows Scout as she returns to visit her father, Atticus, the lawyer who fought racial injustice in Mockingbird.

But as Lee herself put it in a recent announcement through her publisher, “my editor, who was taken by the flashback (倒叙) to Scout’s childhood, persuaded me to write a novel from the point of view of the young Scout. I was a first-time writer, so I did as I was told.” That book was, of course, To Kill a Mockingbird, and after it was released to great praise, Lee never returned to Go Set a Watchman. In fact, that earlier work was considered lost until Lee’s lawyer found a manuscript (手稿) of it.

“After much thought and hesitation I considered it worthy of publication.” said Lee. “I am amazed that this will now be published after all these years.” So the book that gave birth to To Kill a Mockingbird will now serve as its sequel (续集).

It’s safe to say that, decades after the publication of Mockingbird, millions of readers who were so touched by Ms. Lee’s second novel will be counting the days until the release of her first one.

1.When was Mockingbird published according to the text?

A. In 1950.　　 B. In 1960.

C. In 1970.　　 D. In 1980.

2.What can we know about the book of Watchman?

A. Atticus found a manuscript of the writer.

B. Atticus was a lawyer fighting racial injustice.

C. Scout Finch got to Alabama to see Atticus.

D. Scout Finch lost one of Atticus’ manuscripts.

3.What does “the book” in the fourth paragraph refer to in the writer’s opinion?

A. To Kill a Mockingbird.　　 B. Go Set a Watchman.

C. The classic volume.　　 D. Ms. Lee’s second novel.

4.The text mainly talks about 　　　　 .

A. why Ms. Lee’s first novel will become her second one

B. how Ms. Lee’s first novel differs from her second one

C. when Go Set a Watchman was actually written

D. what Ms. Lee’s two great novels really deal with

高三英语阅读理解困难题查看答案及解析

　　is known to us all is that the old scientist, for 　　 life was hard in the past, still works very hard in his eighties．

A．As; whom　　　　    B．What; whom

C．It; whose　　　　      D．As; whose

高三英语单项填空简单题查看答案及解析

________is known to us all is that the old scientist, for 　　 life was hard in the past, still works very hard in his eighties．

A．As; whom　　　　                         B．What; whom

C．It; whose　　　　                          D．As; whose

高三英语单项填空困难题查看答案及解析

Mr. Green stood up in defence of the 16-year-old boy, saying that he was not the one        ．

A．blamed        B．blaming     C．to blame            D．to be blamed

高三英语单项填空简单题查看答案及解析