B
Global warming will significantly increase the frequency of lightning strikes, according to a US research.
The research, published in Science, was carried out with the help of data from a US network of lightning detectors. The teams says they have calculated how much each extra degree in temperature will raise the frequency of lightning. "For every two lightning strikes in 2000, there will be three lightning strikes in 2100," said David Romps, at the University of California, Berkeley.
As well as triggering more wild fires, he said, this would alter the chemistry of the atmosphere.
The team's work reveals a new method of working out the relationship between temperature and lightning storms, by estimating the heat energy available to "fuel" storm clouds. "As the planet warms, there will be more of this fuel around, so when thunderstorms get triggered, they will be more energetic," said Prof Romps.
He and his colleagues calculated that every 1℃rise in global temperature would lead to an increase in the frequency of lightning strikes by 12%.
They validated their calculations against a year of data from the US National Lightning Detector Network, which detects an electromagnetic pulse every time lightning strikes in the US. "The resulting data is exquisite," said Dr Romps. "The position and time of every lightning strike is very accurately recorded."
As well as triggering half of the wildfires in the US, each lightning strike— a powerful electrical discharge— sparks a chemical reaction that produces a "puff" of greenhouse gases called nitrogen oxides." Lightning is the
dominant source of nitrogen oxides in the middle and upper troposphere（对流层）," said Prof Romps.
And by controlling this gas, it indirectly regulates other greenhouse gases including ozone and methane. Prof Romps said that this was an example of a large response to "what sounds like only a few degrees of warming".
A scientist at the UK Met Office said it was important to understand future lightning patterns, but cautioned that there were still uncertainties in the researchers' model that needed to be tested further. The Met Office added that the application of this forecast to other parts of the world could be limited by the fact that rainfall patterns were very uncertain in many regions.
The best title for the passage should be .
| A．Global warming causes more wildfires |
| B．A new research on the effects of global warming |
| C．Climate change will make lightning strike more |
| D．The relationship between temperature and lightning |
According to Prof. Romps, .
| A．it remains to be seen whether the lightning will trigger wildfires |
| B．the research is working out the causes of the wildfires |
| C．they detected an electromagnetic pulse every time lightning strikes in the US |
| D．lightning plays a major role in creating nitrogen oxides in the middle and upper troposphere |
What did the UK Met Office think of the result of the research?
| A．The researchers’ model was not convincing enough. |
| B．The rainfall patterns stayed stable in many areas over a long time. |
| C．The result wouldn’t be applied to other parts of the world. |
| D．No research would be needed to make sure of the result. |
Home to me means a sense of familiarity and nostalgia(怀旧). It's fun to come home. It looks the same. It smells the same. You'll realize what's changed is you. Home is where we ran remember pain, live, and some other experiences; We parted here; My parents met here; I won three championships here.
If I close my eyes, I can still have a clear picture in mind of my first home. I walk in the door and see a brown sofa surrounding a low glass-top wooden table. To the right of the living room is my first bedroom. It's empty, but it's where my earliest memories are.
There is the dining room table where I celebrated birthdays, and where I cried on Halloween-when I didn't want to wear the skirt my mother made for me. I always liked standing on that table because it made me feel tall and strong. If I sit at this table, I can see my favorite room in the house, my parents' room. It is simple: a brown wooden dresser lines the right side of the wall next to a television and a couple of photos of my grandparents on each side. Their bed is my safe zone. I can jump on it anytime - waking up my parents if I am scared or if I have an important announcement that cannot wait until the morning.
I'm lucky because I know my first home still exists. It exists in my mind and heart, on a physical property(住宅) on West 64th street on the western edge of Los Angeles. It is proof I lived, I grew and I learned.
Sometimes when I feel lost, I lie down and shut my eyes, and I go home. I know it's where I'll find my family, my dogs, and my belongings. I purposely leave the window open at night because I know I'll be blamed by Mom. But I don't mind, because I want to hear her say my name, which reminds me I'm home.Why does the author call her parents' bed her "safe zone"(Paragraph 3)?
| A．It is her favorite place to play. |
| B．Her needs can be satisfied there. |
| C．Her grandparents' photos are lined on each side. |
| D．Her parents always play together with her there. |
What can be learned from the passage?
| A．The old furniture is still in the author's fist bedroom. |
| B．The author can still visit her first physical home in Los Angeles. |
| C．The author's favorite room in her first home is the dining room. |
| D．Many people of the author's age can still find their first physical homes. |
Sometimes when she feels lost, the author will _______.
| A．Open the window at night |
| B．lie down in bed to have a dream |
| C．try to bring back a sense of home |
| D．go to Los Angeles to visit her mom |
What is the author's purpose of writing this passage?
| A．To express how much she is attached to her home. |
| B．To declare how much she loves her first house. |
| C．To describe the state of her family. |
| D．To look back on her childhood. |
LONDON - A British judge on Thursday sentenced a businessman who sold fake(假冒的) bomb detectors(探测器) to 10 years in prison, saying the man hadn't cared about potentially deadly consequences.
It is believed that James McCormick got about $77.8 million from the sales of his detectors - which were based on a kind of golf ball finder - to countries including Iraq, Belgium and Saudi Arabia.
McCormick, 57, was convicted(判罪) of cheats last month and sentenced Thursday at the Old Bailey court in London.
"Your cheating conduct in selling a great amount of useless equipment simply for huge profit promoted a false sense of security and in all probability materially contributed to causing death and injury to innocent people," Judge Richard Hone told McCormick. "you have neither regret, nor shame, nor any sense of guilt."
The detectors, sold for up to $42,000 each, were said to be able to find such dangerous objects as bombs under water and from the air. But in fact they "lacked any grounding in science" and were of no use.
McCormick had told the court that he sold his detectors to the police in Kenya, the prison service in Hong Kong, the army in Egypt and the border control in Thailand.
"I never had any had results from customers," he said.Why was McCormick sentenced to prison?
| A．He sold bombs. | B．He caused death of people. |
| C．He made detectors. | D．He cheated in business. |
According to the judge, what McCormick had done _______.
| A．increased the cost of safeguarding |
| B．lowered people's guard against danger |
| C．changed people's idea of social security |
| D．caused innocent people to commit crimes |
Which of the following is true of the detectors?
| A．They have not been sold to Africa. |
| B．They have caused many serious problems. |
| C．They can find dangerous objects in water. |
| D．They don't function on the basis of science. |
It can be inferred from the passage that McCormick _______.
| A．sold the equipment at a low price |
| B．was well-known in most countries |
| C．did not think he had committed the crime |
| D．had not got such huge profit as mentioned in the text |
On a sunny day last August, Tim heard some shouting. Looking out to the sea carefully, he saw a couple of kids in a rowboat were being pulled out to sea.
Two 12-year-old boys, Christian and Jack, rowed out a boat to search for a football. Once they'd rowed beyond the calm waters, a beach umbrella tied to the boat caught the wind and pulled the boat into open water. The pair panicked and tried to row back to shore. But they were no match for it and the boat was out of control.
Tim knew it would soon be swallowed by the waves. "Everything went quiet in my head," Tim recalls(回忆). "I was trying to figure out how to swim to the boys in a straight line."
Tim took off his clothes and jumped into the water. Every 500 yards or so, he raised his head to judge his progress. "At one point, I considered turning back," he says. "I wondered if I was putting my life at risk." After 30 minutes of struggling, he was close enough to yell to the boys, "Take down the umbrella!" Christian made much effort to take down the umbrella. Then Tim was able to catch up and climb aboard the boat. He took over rowing, but the waves were almost too strong for him.
"Let's aim for the pier(码头)," Jack said. Tim turned the boat toward it. Soon afterward, waves crashed over the boat, and it began to sink. "Can you guys swim?" he cried. "A little bit," the boys said. Once they were in the water, Tim decided it would be safer and faster for him to pull the boys toward the pier. Christian and Jack were wearing life jackets and floated on their backs. Tim swan toward land as water washed over the boys' faces.
“Are we almost there?” they asked again and again. "Yes," Tim told them each time. After 30minutes, they reached the pier.Why did the two boys go to the sea?
| A．To go boat rowing. |
| B．To get back their football. |
| C．To swim in the open water. |
| D．To test the umbrella as a sail. |
What does "it” in Paragraph 2 refer to?
| A．The beach. | B．The water. |
| C．The boat. | D．The wind. |
Why did Tim raise his head regularly?
| A．To take in enough fresh air. |
| B．To consider turning back or not. |
| C．To check his distance from the boys. |
| D．To ask the boys to take down the umbrella. |
How did the two boys finally reach the pier?
| A．They were dragged to the pier by Tim. |
| B．They swam to the pier all by themselves. |
| C．They were washed to the pier by the waves. |
| D．They were carried to the pier by Tim on his back. |
| 1． |
What you have just read is a.
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| 2． |
What is going to take place on 2 February, 2013?
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| 3． |
How much do you have to pay in total if four of you go together?
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| 4． |
Which of the following statements is true?
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A study of more than five million books, both fiction and non-fiction, has found a marked decline in the use of emotional words over time. The researchers form the University of Bristol used Google Ngram Viewer, a facility for finding the frequency of terms in scanned books, to search for more than 600 particular words identified as representing anger, dislike, fear, joy, sadness and surprise.
They found that almost all of the categories (类别) showed a drop in these “mood words” over time. Only in the category of fear was there an increase in usage.
“It is a steady and continuous decrease,” said Dr Alberto Acerbi. He assumed that the result might be explained by a change in the position occupied by literature, in a crowded media landscape. “One thing could be that in parallel to books the 20th century saw the start of other media. Maybe these media—movies, radio, drama—had more emotional content than books.”
Although both joy and sadness followed the general downwards trend, the research, published in the journal PLOS One, found that they also exhibited another interesting behaviour：the ratio (比率) between the two varied greatly, apparently mirroring historical events.
During the Roaring Twenties the joy-to-sadness ratio reached a peak that would not occur again until before the recent financial crash. But the ratio plunged at the height of the Second World War. Nevertheless, the researchers held a reserved opinion about their claim that their result reflected wider social trends. In the paper, they even argue that the reverse could be true.
“It has been suggested, for example, that it was the suppression (压抑) of desire in ordinary Elizabethan English life that increased demand for writing ‘filled with romance and sex’… perhaps,” they conclude, “songs and books may not reflect the real population any more than catwalk models reflect the average body.”
(Note：Answer the questions or complete the statements in NO MORE THAN TEN WORDS.)A study of more than five million books indicated a decline in “mood words” over time except
According to Dr Alberto Acerbi, one reason for the drop of “mood words” in books may be that
What were the two periods when the joy-to-sadness ratio was at its highest?
While the researchers found some changes in the use of “mood words” in books, they werenot sure that
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