.
Some people can stay up all night and still get work done the next day. I’m not one of them. After a night without enough sleep, I feel sleepy. I have trouble remembering things. And all I want to do is to go back to bed and sleep.
How do you feel after you’ve stayed up late to finish schoolwork? Or the day after a slumber(睡眠) party? Scientists now say that your answers to these questions may depend on your genes, which tell our bodies and brains what to do. People have about 40,000 genes, and each gene can have different forms.
A new research suggests that a gene called period3 affects how well you function without sleep. The discovery adds to older evidence that period3 helps determine whether you like to stay up late or get up early.
The period3 gene comes in two forms: short and long. Everyone has two copies of the gene. So, you may have two longs, two shorts, or one of each. Your particular combination depends on what your parents passed on to you.
Scientists studied 24 people who had to stay awake for 40 hours straight. Then they took tests that measured how well they could remember lists of numbers.
Results showed that the people with the short form of period3 performed much better than those with the long form did. In both groups, people performed worst in the early morning. After the first round of experiments, participants were finally allowed to sleep. People in the group that performed well on the tests took about 18 minutes to nod off(瞌睡).
People with long period3 gene fell asleep in just 8 minutes. They also spent more time on deep sleep. That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working in top form.
I think I must have the long form period3. What about you?
68. The purpose of the writer in the first paragraph is to ____________.
A. attract readers to the topic of the passage
B. show his /her poor memory for things
C. show his /her envy of those energetic people
D. prove his/her need for sleep
69. Whether you can stay up or not depends on___________.
A. the size of your brain B. the kind of genes you have
C. your health D. your will
70. The aim of the research is to _______.
A. find a new gene called period3 B. find out how genes affect a person’s need for sleep
C. test how long you can stay awake D. measure how good your memory is
We might like to think we're not influenced by other people, but a new study into the group-buying mechanisms（机制） - like those used on coupon（优惠券） sites such as Groupon and LivingSocial - reveals that telling buyers who come later to the offer how many have already signed up increases the number of purchasers.
Researchers at the University of Toronto's Rotman School of Management wanted to understand why group buying sites that have entered the market recently have enjoyed greater success than those operating a decade ago, such as Mercata and MobShop.
Earlier attempts typically left potential buyers waiting for days before confirming whether or not they had got the offer they had signed up for.
“We think one of the reasons group-buying has been successful recently is because of the short time horizon,” says Rotman Professor Ming Hu, who co-wrote the study with Professor Mengze Shi and PhD student Jiahua Wu. “It allows for a herding effect.”
Another reason is the use of an information structure that discloses to later arrivals how many have already signed onto the deal.
Researchers looked at two ways of designing the purchasing mechanism for a group buy:a simultaneous mechanism, where no one knows how many buyers have come before them, and asequential（连续的） mechanism, where a second group of buyers has the advantage of knowing the size of the first group.
The researchers' analytical（分析的） model shows the most successful mechanism is the sequential one because it eliminates uncertainty for those coming later to the deal, and improves the confidence of those who sign on early, as they're able to track the numbers of those who come after them.
“That boosts confidence,” says Professor Hu, who teaches operations management. Deals for "luxury" services, versus everyday items, work better in a group buy scenario（方案） because they offer consumers a greater benefit.It can be learned from the text that ______.
| A．the short time horizon is the reason why group-buying has been successful. |
| B．a simultaneous mechanism is where a group of buyers has the advantage of knowing how many people have signed up. |
| C．a sequential mechanism allows a herding effect which boosts the confidence of the buyers. |
| D．researchers at the University of Toronto's Rotman School of Management carried out an experiment about why group buying sites entered the market successfully, such as Mercata and MobShop. |
The underlined word “eliminates” in paragraph 7 probably means“______”.
| A．to become or to make something greater in amount, number, value |
| B．to remove or get rid of something |
| C．to deliberately not include something in what you are doing or considering |
| D．to make something known to somebody |
What can be the best title for the passage?
| A．Secret for marketing success – boosting confidence. |
| B．Secret for group-buying mechanism—herding effect. |
| C．Comparison between a simultaneous mechanism and a sequential mechanism. |
| D．What others do influences our decisions. |
Mobile phones are an important business tool for farmers in rural areas. But they also put a valuable educational tool in their hands.
The University of Illinois in the United States has a project called SAWBO—Scientific Animations Without Borders. It produces educational videos that can be downloaded to cell phones. The goal is to help people in developing countries improve their lives.
One video shows farmers how to make a natural insecticide from neem seeds to prevent insect damage to crops. The process starts with sorting and drying the neem fruits. Then let the fruit dry in the sun for about three or four days, until they become brown. Using a mortar(碾槌) and stick, the fruits are slightly pounded to remove the shells from the fruits without breaking the seed inside.
The videos use computer animation(动画). Some of the animated characters are a little funny looking-like a farmer with a long nose. But the subjects are serious, including a health video on preventing cholera(霍乱). Team member Francisco Seufferheld says the information in the videos is meant to be quickly understood. He says, “The information is digested in such a way that in two minutes, we can transmit a complex idea.”
The researchers tested the seven-minute video on seven mobile phones. They wanted to see if people would share the video using Bluetooth wireless technology. With Bluetooth, files can be passed to a nearby phone even if neither phone is connected to the Internet. As a result, in one month, the video had spread to one hundred eighteen people in fifty different villages. “This is just incredible impact,” said Francisco Seufferheld.
The team has made a few videos so far. These are available in a total of eighty languages, dialects and accents. Professor Barry Pittendrigh says there are plans for more videos later this year. What is the text mainly about?
| A．A best-selling mobile phone |
| B．A valuable educational project for farmers |
| C．United States support for developing countries |
| D．A new type of scientist –farmer relationship |
The SAWBO program is introduced in order to ____.
| A．raise farmers’ standard of living |
| B．do some research on mobile phones |
| C．develop farmers’ practical skills |
| D．help farmers prevent insect damage to corps |
The biggest advantage of the program is that it______.
| A．includes health video on preventing cholera |
| B．can be passed to farmers using Bluetooth technology |
| C．can be used to sort and dry the neem fruits |
| D．is easy for farmers to understand |
Which of the following words can best take the place of the word “ pound” in the 3rd paragraph?
| A．moved | B．beat | C．picked | D．cut |
They may be small and not able to speak, but babies are proving their amazing cleverness. Scientists began finding infants’ skills are more than they are supposed to be.
_________
Speaking of music, babies can’t seem to resist it. Not only are their ears turned to the beats, babies can actually dance to the music.
To test babies’ dancing ability, the researchers played recordings of classical music, rhythmic beats and speech to infants, and recorded the results. They also invited professional dancers to analyze how well the babies matched their movements to the music. The babies moved their arms, hands, legs feet and heads in response to the music, much more than to the speech. The finding suggests this dancing ability is innate(与生俱来的) in humans, though the researchers aren’t sure why it becomes weaker later in their life.
Learning Quickly while Sleeping
Babies can learn even while asleep, according to a 2011 study. In experiments with 26 sleeping infants, each just 1 to 2 days old, scientists played a musical tone followed by a puff of air to their eyes 200 times over the course of a half-hour. 124 electrodes(电极) stuck on the head and face of each baby recorded brain activity during the experiments. The babies rapidly learned to foretell a puff of air upon hearing the tone, showing a four-time increase on average in the chances of tightening their eyelids in response to the sound by the end of the experiments.
As newborns spend most of their time asleep, this newfound ability might be crucial to rapidly adapting to the world around them and help to ensure their survival, researchers said.
Judging Characters Well
Judging another person helpful or harmful is crucial when choosing friends. And that ability starts early. Kiley Hamlin of Yale University showed both 6-and 10-month-olds a puppet(木偶) show, in which one character helped another climb a hill. In another scene a third character pushed the climber down. The little ones then got to choose which character they preferred. For both age groups, most babies chose the helper character. This character-judging ability could be baby’s first step in the formation of morals, Hamlin thought.Which of the following subtitles can fill in the underlined blank?
| A．Dancing to Music |
| B．Babies’ Amazing Abilities |
| C．Learning to Dance Quickly |
| D．Born to Dance |
The underlined word “it” in the third paragraph refers to______.
| A．the finding |
| B．the dancing ability |
| C．the response |
| D．the baby |
The experiment with 26 sleeping infants prove that_______.
| A．babies can learn even while asleep |
| B．babies can respond to the world around them |
| C．babies can tighten their eyelids in response to the sound |
| D．babies can communicate with others while asleep |
In the last experiment, most babies chose the helper character, showing that________.
| A．babies can judge a person helpful or harmful |
| B．babies love to see a puppet show |
| C．babies were born to help others |
| D．babes have learned to help others |
Joey is loyal, encouraging and self-sacrificing, always putting others’ interests ahead of his own. He is a hard worker, who also loves to run and play. In short, he’s an ideal friend and a heroic character.
Here is the thing: Joey is a horse, who appears as the main character in Steven Spielberg’s new film War Horse.
It is based on Michael Morpurgo’s 1982 novel, which also caused the same-titled Tony Awards winning play.
The film follows the saga of Joey, a racehorse that’s trained for farm work under the loving care of Albert (Jeremy Irvine )after Albert’s drunk father Ted(Peter Mullan ) overpays for the animal at auction(拍卖会).
Then the World War I tears Albert and Joey apart. Joey is sold into the war effort for the British and starts his episodic adventures in Europe.
Splendidly staged, the battle plots in the film are visually astounding and impressive.
And with Spielberg’s unique, top-notch direction and storytelling skills, War Horse cannot escape its episodic nature, calling to mind another Spielberg film about the horrors of war and its effects upon soldiers and civilians—Saving Private Ryan.
While that film shocked with horrific scenes of bleeding, it relied on a company of easily-described characters and a focused storyline to present heroic themes.
Like Saving Private Ryan, War Horse clings to a series of characters, not only Albert, but also British officers, French civilians and German soldiers, who display courage in the face of danger. Everyone who comes in contact with Joey is either already in touch with their inner angel or is quickly moved to become more humane.
Although none of this covers the fact that we’ve seen this stuff elsewhere before, the lovely sentiment will steal your heart.
And the emotional signature of Spielberg can be felt as he establishes the relationship between the boy and the horse and the mood of the piece – there will be tears.
Therefore, calling this beautiful, dramatically incomplete film “ Saving Private Joey”, is entirely justifiable. In common with “ Saving Private Ryan”, the filmWar Horse _________ .
| A．is full of terrifying scenes of bleeding and killing |
| B．received the title of Tony Awards Winning Play |
| C．covers a lot of characters |
| D．tells the story happening in the Second World War |
Which statement is true according to the passage?
| A．War Horse is based on the same-titled novel by Steven Spielberg. |
| B．Joey is a heroic character because he saved many people’s lives. |
| C．Albert sold Joey into the war effort for Europe. |
| D．Joey came to Albert’s care after Ted paid a lot of money for it. |
According to the passage, what does the underlined word astounding mean?
| A．astonishing | B．confusing | C．satisfying | D．disappointing |
What is the best title for the passage?
| A．Joey ─ a heroic race horse | B．Albert and Joey |
| C．Saving Private Joey | D．Spielberg’s Joey |
A disheveled (头发凌乱的) man appeared in court Thursday on charges of murdering a Chinese woman whose fight with her attacker was seen on webcam(摄像头) by her boyfriend in China. Police refused to release any details about the crime or its possible motive.
The body of York University student Liu Qian, 23, of Beijing, was found Friday in her apartment in Toronto a few hours after her boyfriend witnessed the attack, police said.
She was found undressed from the waist down but there were no obvious signs of sexual attack or trauma (创伤) severe enough to kill her. Police say it may be weeks before the results of an autopsy (尸体解剖) are known.
Brian Dickson, 29, stood before the court in a wrinkled white shirt and blue jeans as a charge of first- degree murder was read out. He did not enter a plea. His case was held over until April 26.
Dickson was arrested Wednesday. Police only announced his name and his age and asked the media not to publish any photos of Dickson, saying it could compromise the investigation. Toronto police spokesman Tony Vella declined to respond to the request further.
Liu’s father, Liu Jianhui, who arrived from China after being informed of his daughter’s death, thanked authorities for their quick action.
“I sincerely thank the people concerned with my daughter’s case,” he told reporters after the arrest. “Our daughter was studying very hard.”
Police released no motive or details about Dickson, but one friend described the Toronto man as an aspiring actor.
Patricia Tomasi, a friend of Dickson’s, told The Associated Press that she acted in a play at a local theater in Toronto with Dickson in 2007.
“He doesn’t seem like the type but that’s what they always say,” Tomasi said. “He’s tall with boyish good looks. I don’t know much about him except that he wanted to be an actor.”
Dickson attended York University where he studied global politics, but did not earn a degree from there.
He later worked for the Atlantic Council of Canada (ACC), where he served as an assistant to the president Juilie Lindhout. According to his biography on a newsletter from the Atlantic Council of Canada, Dickson has also been a running instructor and has been involved with Developments in Literacy, a Pakistani aid organization that raises money for children in Pakistan.
A statement from the Atlantic Council of Canada on Thursday said it was not council policy to comment on staff, but it confirmed that Dickson had been an intern(实习生) with the council from September 29, 2008, until March 27, 2009.
Liu was chatting with her boyfriend, Meng Xianchao, by webcam at about 1 am. Friday when a man knocked on the door, police said.
Meng reported seeing a struggle break out between the two before Liu’s webcam was shut off. Meng contacted other friends in Toronto who in turn called police.
The victim’s father, Liu Jianhui, said his daughter studied at Beijing City University before moving to Canada, where she met Meng.
Liu Qian’s laptop computer, webcam and mobile phone were taken from the apartment the night of the attack, police said. Police said the online chat was on a live streaming camera and was not recorded, though investigators were trying to figure out if there was any way they could recover it.
York University, whose campus is located near one of Toronto’s rougher neighborhoods, is one of Canada’s largest universities with more than 53,000 undergraduate and graduate students. About 3,200 of York’s students come from more than 150 foreign countries, the university’s website says.Which of the following statements is NOT true according to the passage?
| A．York University students come from over 150 foreign countries. |
| B．Dickson was a graduate of York University where he studied global politics. |
| C．The passage does not mention the reason why Dickson murdered Liu Qian. |
| D．ACC wouldn’t make any comments on staff even if they committed a crime. |
The underlined word in paragraph 8 probably means ______.
| A．a successful actor | B．a gifted actor |
| C．a common actor | D．an ambitious actor |
Why did police ask the media not to publish any photos of Dickson?
| A．Worrying about bad influences on the investigation. |
| B．Not intending to give out any information about Dickson. |
| C．Not confirming whether Dickson had killed Liu Qian. |
| D．Wanting to protect their citizen for fear of losing face. |
What can be inferred from the text?
| A．Developments in Literacy raises money for all children |
| B．Seeing the struggle, Meng contacted Toronto police. |
| C．Dickson had no bad records before the murder. |
| D．Investigators could recover the chat record online. |