How would you like to sleep with one half your brain asleep and the other half awake? Dolphins sleep this way. Recently, scientists at Indiana State University have discovered that ducks sleep this way too. They found that ducks sleep half awake so they can rest and watch for danger at the same time. After putting their ducks in a row and videotaping them, some researchers found ducks on the end of each row spent more time asleep with one eye open, apparently looking for _ "The more the ducks felt threatened, the more they slept with one eye open," said lead author Niels C. Rattenborg, a graduate student at Indiana State University, Terre Haute. "The unique aspect is not that they do it, but that they control it. When they sleep at the edge of a group, they tend to realize greater danger, so they spend more time sleeping with one half of their brain." Ducks with one eye open were still awake enough to detect predators, said the authors of the study, which appears today in the journal Nature. The researchers studied four groups of four ducks held in plastic boxes, which were arranged in a row. Ducks on the end were found to sleep with one eye open 31.8 per cent of the time, compared to 12.4 percent of the time for ducks in the central position. Also, ducks in the central position did not open one eye more than the others, while ducks on each end kept the eye facing away from the group open 86.2 per cent of the time. Brain wave readings of the ducks showed that the half of the brain receiving signals from the closed eye indicated that half of the brain was sleeping. Signals from the half of the brain receiving signals from the open eye showed a state between fully awake and asleep. Which of the following is true according to the passage? A) Ducks with one eye open at the edge can still enjoy a certain degree of sleep. B) Ducks with less sense of duty usually choose to stay in the center of a row. C) Ducks on the northern end of a row would keep their eye facing the south open. D) A video tape recorder was the only electronic device used in the experiment.
A
Beijing's historic hutong are in danger of disappearing. That's the warning from residents and historians, who have called on authorities to do more to protect this unique part of the capital's culture. In 2000, Beijing still had 1,300 hutong, according to amateur historian Zhang Wei. But he estimates that since then, at least half of them have disappeared. According to regulations, people can report illegal buildings to urban patrol officers, known as chengguan, and buildings found to be illegal will be demolished by force. However, a China Daily reporter found that it was not an easy task, and lots of additional structures built by their owners were found in hutong. Many owners added a second floor or even more floors to their houses, especially in buildings near main streets, in order to rent more apartments and make more money. Zhang, the historian, said that to better protect the hutong, the government should offer more compensation to residents willing to move away. Guo Dazhi, a photojournalist in Beijing, lived in a hutong for nearly 30 years before moving to eastern Chaoyang district. Guo hopes that the government can solve the problem by moving residents out of hutong with policies such as public renting programs. However, the Beijing Commission of Urban Planning said in a report in July that the relocation of residents from old areas was very expensive.According to the report, allocating 10,000 residents costs 1.5 billion yuan . What is the suggestion mentioned of solving the problem? A) moving residents out of hutong with force B) introduce social capital for investment in constructure C) offer more money to residents willing to move away. D) build more hutong
C
Q: From hitting the mall with your girl friends on a Saturday afternoon, to holiday spending on gifts that go under the tree, shopping could be called one of America's favorite pastimes. For most people, it means some new clothes for work or a small trinket for a friend. For others, however, shopping is much more than an enjoyable pastime, and in some cases, it is a real and destructive addiction that can turn into a financial disaster. Compulsive shopping and spending are defined as inappropriate, excessive, and out of control. Like other addictions, it basically has something to do with impulsiveness and lack of control over one's impulses. In America, shopping is embedded in our culture; so often, the impulsiveness comes out as excessive shopping. Sometimes this is referred to as "shopholism". Shopping addiction can damage a person's life, family, and finances. "No one knows what causes addictive behaviors, like shopping, alcoholism, drug abuse, and gambling", says a professor of applied health science. Some of the new evidence suggests that some people, maybe 10%-15%, may have a genetic predisposition to an addictive behavior, coupled with an environment in which the particular behavior is triggered, but no one really knows why." Individuals will get some kind of high from an addictive behavior like shopping. What are the telltale signs that shopping has crossed the line and become and addiction? What should a concerned family member or friend look out for when they think shopping has become a problem? The behaviors can signal a serious problem: *Shopping or spending money as a result of feeling angry, depressed, anxious, or lonely *Having arguments with others about one's shopping habits *Feeling lost without credit cards -- actually going into withdrawal without them *Buying items on credit, rather than with cash *Describing a rush or a feeling of euphoria with spending *Feeling guilty, ashamed, or embarrassed after a spending spree *Thinking obsessively about money *Spending a lot time juggling accounts... Which of the following statement is not true? _ . A) Medication will not help to cure a shopping addiction B) No one really knows why people get addicted to doing something which is no good to them C) By the word shopholism, we refers to the impulsive and excessive shopping behavior D) Shopping addiction can turn into a real disaster in one's life
A: A
Q: Eight days for justY=12,000 Departs:May--October 2007 Includes: * Return flights from 6 China's airports to Naples * Return airport to hotel transport * Seven nights'accommodation at the 3-star Hotel Nice * Breakfast * The service of guides * Government taxes Join us for a wonderful holiday in one of the Europe's most wonderful-Naples in Italy if you want to have a nice time in a beautiful small quiet place.The ancient Romans called the city"happy land"with attractive coastline,colorful towns,splendid views and the warm Mediterranean Sea.Your best choice for a truly memorable holiday! Choose between the peaceful villages of Sant' Agata,set on a hillside six miles away from Sorrento,or the more lively and well-known international resort town of Sorrento,with wonderful views over the Bay of Naples. Breathtaking scenery,famous sights and European restaurants everywhere.From the mysterious Isle of Capri to the hunting ruins of Pompeii,and from the unforgettable"Amalfi Drive"to the delightful resorts of Positano,Sorrento and Ravello,the area is a feast for the eyes! Join us,and you won't be disappointed! Price based on two tourists sharing a double room at the Hotel Nice.A single room,anotherY=2,000.A group of ten college students,Y=10,000 for each. Like to know more ? Telephone Newmarket Air Holidays Ltd on:0845-226-7788(All calls charged at local rates). If you don't like sharing a room with others,you have to pay _ in all for the trip? A) Y=12,000 B) Y=10,000 C) Y=14,000 D) Y=2,000
A: C