People born in winter are more likely to suffer mental health disorders, according to a recent study carried out by researchers at Vanderbilt University in Tennessee.
Researchers raised baby mice from birth to weaning (断奶) in either “summer” light cycles of 16 hours of light and 8 hours of dark or “winter” cycles of 8 hours of light and 16 hours of dark. A third group experienced 12 hours of light and 12 hours of dark a day.
Then half the winter mice stayed in a winter cycle, while half switched to a summer schedule. The summer mice were similarly split. The mice raised in equal periods of light and dark were split into three groups, one of which stayed on the 12hour schedule, one of which joined the winter group, and one of which joined the summer group.
After 28 days, it turns out the summerborn mice behaved the same whether they stayed on the summer cycle or switched to winter. But among the winterborn mice, those stayed in winter kept their previous schedule, while those that switched to summer stayed active for an extra hour and a half, which indicates that mice born and weaned in a winter light cycle showed dramatic disruptions in their biological clocks.
The finding is the first of its kind in mammals, and it could explain why people born in winter are at higher risk for mental health disorders including bipolar depression, schizophrenia and seasonal affective disorder.
“We know that the biological clock regulates mood in humans，”said study researcher McMahon. “If the mechanism (机制) similar to the one that we found in mice operates in humans, then it could not only have an effect on a number of behavioral disorders, but also have a more general effect on personality.”How many groups of mice are there finally in all in the experiment?
| A．Seven. | B．Six. | C．Five. | D．Four. |
What's the main idea of the text?
| A．The biological clock regulates mood in humans. |
| B．People born in winter are at higher risk for physical health disorders. |
| C．The length of light will influence the behavior of the mice. |
| D．Being born in winter has a negative effect on people's mental health. |
The underlined word “split”(Paragraph 3) can be replaced by ________.
| A．ended | B．divided | C．hit | D．torn |
Who is the appropriate reader of the passage?
| A．A jobhunter. |
| B．A student in the university. |
| C．A newlymarried couple. |
| D．An experienced dentist. |
Heading off to college this year? Here are some fashion tips from our experts you should keep in mind：
Dress to impress．Stylist and business consultant Daniela Smith says，“Girls should keep in mind that your college professors will often be the bridge that connects you to your future career and your classmates will become your professional network，You don't need to dress like you're going to the office, but you．should display all ability to properly present yourself with appropriate maturity and confidence，and look put together．”
Logo mania(品牌狂热症)．Wearing the loges of brands aimed at younger customers physically identifies you as part of that age group，so consider the targeted age group of the stores you shop at．It's tempting to load up on loges，especially well-known loges that signify high-end brands．But consider this：college is a time of self-discovery, a chance to develop your own personal style．Instead of wearing loges head to toe，“walking advertisement”-style，why not express who you really are?
Wear real pants! The combination of leggings and baggy shirts is all too common on college campuses．Smith points out that leggings，yoga pants，and Sweatpants ale entirely unacceptable in public unless you're exercising．Although leggings worn as pants are a common trend among high school and college girls，they are not an appropriate choice for daywear；As a young woman, your style choice should begin to reflect your maturity level．So，get rid of leggings and wear real pants!
Keep the cute factor to a minimum．Stay away from sweaters and T-shirts with smiling animals, cartoon characters，or Hello Kitty on them．Sure，kittens might be cute，but they're not doing you any favors in the style department．Dressing too cutesy can take years off your look，and not necessarily in a good way!The second paragraph indicates the importance of .
| A．impressing professors |
| B．getting on well with classmates |
| C．creating a professional image |
| D．dressing appropriately |
The author believes that college girls should ．
| A．choose a 1ogo that suits their age |
| B．try to load up on well-known logos |
| C．use logos to show who they are |
| D．find their identity by trying different logos |
The author recommends wearing real pants because ．
| A．leggings and baggy shirts are too common |
| B．yoga pants and sweatpants are not as comfortable |
| C．real pants can present you with appropriate maturity |
| D．people like real pants better man the other pants |
What's the writer's attitude towards sweaters with animals on them?
| A．They make people look lovely． |
| B．They are very fashionable these days． |
| C．They will show you're an animal lover． |
| D．They are not suitable for college-aged students． |
In which magazine would you most likely find this passage?
| A．Business Week | B．Parents | C．In style． | D．Travel ＆ Leisure． |
Since the 1970s, scientists have been searching for ways to link the brain with computers．Brain-computer interface（BCI） technology could help people with disabilities send commands to machines．
Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated（展示）a small robotic wheelchair directed by a person’s thoughts．
In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand．He could even talk as he watched the vehicle and guided it with his thoughts．
“Our brain has billions of nerve cells．These send signals through the spinal cord（脊髓）to the muscles to give us the ability to move．But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles,” Tavella says．“Our system allows disabled people to communicate with external world and also to control devices．”
The researchers designed a special cap for the user．This head cover picks up the signals from the scalp（头皮）and sends them to a computer．The computer interprets the signals and commands the motorized wheelchair． The wheelchair also has two cameras that identify objects in its path．They help the computer react to commands from the brain．
Prof．Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands．“The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices．One example is this wheelchair．”
He says his team has set two goals．One is testing with real patients, so as to prove that this is a technology they can benefit from．And the other is to guarantee that they can use the technology over long periods of time．BCI is a technology that can .
| A．help to update computer systems | B．link the human brain with computers |
| C．help the disabled to recover | D．control a person's thoughts |
How did Tavella operate the wheelchair in the laboratory?
| A．By controlling his muscles． | B．By talking to the machine． |
| C．By moving his hand． | D．By using his mind． |
The team will test with real patients to .
| A．make profits from them | B．prove the technology useful to them |
| C．make them live longer | D．learn about their physical condition |
Which of the following would be the best title for the text?
| A．Switzerland, the BCI Research Center |
| B．New Findings About How the Human Brain Works |
| C．BCI Could Mean More Freedom for the Disabled |
| D．Robotic Vehicles Could Help to Cure Brain Injuries |
Given Australia’s size and the fact that early settlements were far apart, Australian society is remarkably homogeneous (同种的). Its citizens are fundamentally prosperous and the way of life in the major cities and towns is much the same however many miles divide them. It takes a sharp ear to identify regional accents. However, there is some difference in lifestyle between city dwellers and the country people. Almost 90 per cent of the population lives in the fast-paced cities along the coast and has little more than a passing familiarity with the desert. The major cities preserve pockets of colonial heritage, but the overall impression is modern, with new buildings reflecting the country’s youth. In contrast, the rural communities tend to be slow-moving and conservative. For many years, Australia was said to have “ridden on the sheep’s back”, a reference to wool being the country’s main money earner. However, the wool industry is no longer dominant. Much of Australia’s relatively sound economy is now achieved from natural coal and wheat, and by being the largest diamond producer in the world. Newer industries such as tourism and wine making are also increasingly important. Australians are generally friendly and relaxed, with a self-deprecating sense of humor. On the whole, Australia is a society without hierarchies (等级制度), an attitude generally held to stem from its prisoner beginnings.
Yet, contrary to widespread belief, very few Australians have true prisoner origins. Within only one generation of the arrival of the First Fleet in 1788, Australia had become a nation of immigrants. Originally coming almost entirely from the British Isles, today one in three Australians comes from elsewhere. Australia’s liberal postwar immigration policies led to an influx of survivors from war-torn Europe, most notably Greeks, Italians, Poles and Germans.
The emphasis has shifted in recent years and today the majority of new immigrants are from Southeast Asia. Today Australia is a ‘blend of nations’ and although some racism exists, it has generally been a successful experiment and the country is justifiably proud to have one of the most harmonious multicultural communities in the world.What does the writer mean by saying “It takes a sharp ear to identify regional accents.” in the first paragraph?
| A．Australians speak Standard English with no local accents whatsoever. |
| B．You have to practice a lot to learn to understand the different accents. |
| C．The Australian regional accents are very difficult to understand indeed. |
| D．There is not much difference between the accents in different areas of Australia. |
Which of the following statements is TRUE according to the passage?
| A．Most Australians have ancestors who were prisoners. |
| B．The Australian economy is dependent on sheep exports. |
| C．The majority of people living in Australia come from Europe. |
| D．The pace of life is different in the city and in the country. |
The underlined pronoun ‘it’ in the final paragraph refers to “_______”.
| A．Community | B．racism | C．blend of Nations | D．Southeast Asia |
We can infer from the passage that _____.
| A．there are no signs of Australia’s colonial past in its modern cities |
| B．Australia’s recent immigration policy encourages immigrants from Southeast Asia |
| C．immigrants from Southeast Asia have brought racial problems |
| D．“riding on sheep’s back” resulted in slow development in rural communities |
Why do people drink too much, eat too much, smoke cigarettes or take drugs? What’s to blame for all the bad behavior? Most people would say that, while these self-destructive acts can have many root causes, they all have one obvious thing in common: they are all examples of failures of self-control, lacking the will power to resist them.
According to a recent study, however, if you really think about it, something about that simple answer doesn’t quite make sense. In fact, it turns out that sometimes it’s having will power that really gets you into trouble.
Think back to the time you took your very first sip (啜饮) of beer. Disgusting, wasn’t it? When my father gave me my first taste of beer as a teenager, I wondered why anyone would voluntarily drink it. And smoking? No one enjoys their first cigarette — it tastes awful. So even though smoking, and drinking alcohol or coffee, can become temptation (诱惑) you need will power to resist, they never, ever start out that way.
Just getting past those first horrible experiences actually requires a lot of self-control. Ironically (讽刺的是), only those who can control themselves well, rather than give in to them, can ever come to someday develop a “taste” for Budweiser beer, Marlboro cigarettes, or dark-roasted Starbucks coffee. We do it for social acceptance. We force ourselves to consume alcohol, cigarettes, coffee and even illegal drugs, in order to seem experienced, grown-up, and cool.
These bad habits aren’t self-control failures — far from it. They are voluntary choices, and they are in fact self-control successes. Self-control is simply a tool to be put to some use, helpful or harmful. To live happy and productive lives, we need to develop not only our self-control, but also the wisdom to make good decisions about when and where to apply it.What do most people think causes bad behavior?
| A．Being forced by others. | B．Not having enough will power. |
| C．Enjoying their first experiences. | D．Following the examples of their friends. |
The author mentions his experience in the third paragraph to prove ____.
| A．will power helps develop bad habits sometimes |
| B．drinking beer is harmful to the health of teenagers |
| C．self-control should be developed when one is young |
| D．everyone can be challenged by different temptations |
In the last paragraph, the author stresses that ____.
| A．without self-control, no one can succeed |
| B．bad habits don’t always lead to bad results |
| C．applying self-control correctly is important |
| D．people can develop wisdom from bad behavior |
What would be the best title for the passage?
| A．My First Sip of Beer | B．Do You Have Will Power ? |
| C．Does Will Power Benefit Us? | D．Dark Side of Self-control |
Item 78431 The Video Camera Pen
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This is the pen that has a built-in video camera, capturing (拍摄，录制) videos or still images with a click of its button．Ideal for use while secured in a pocket, it can capture up to five hours of video. Its battery provides up to two hours of power before requiring a recharge．
Item 78098 The Wristwatch Camcorder
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This is the watch that vividly displays 120 of your favorite digital photographs．You can download digital photographs to the watch．The watch can be viewed in the Photo Album mode (模式) or digital mode （time and date view）．A six-hour charge provides up to 10 days of use．What’s the purpose of this passage?
| A．To advertise some goods． |
| B．To compare some goods． |
| C．To teach how to operate the items． |
| D．To show how fashionable the items are． |
What do Item 78431 and Item 78098 have in common according to this passage?
| A．They both sell well． | B．They both can take photos． |
| C．They both have unusual appearances． | D．They are both cheap． |
If you’re a movie fan, you probably show strong interest in ________．
| A．Item78098 | B．Item78431 | C．Item77281 | D．Item77918 |
Which of the following is TRUE according to the passage?
A．In fact, Item 78098 cannot tell time．
B．Item 77918 works as a DVD player．
C．In a way, Item 77281 is user-friendly．
D All the items include rechargeable batteries．
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