单选题A compound {{U}}break{{/U}} is more serious than a simple one because there is more opportunity for loss of blood and infection.

单选题{{B}}Passage Two{{/B}} What makes teenagers moody and impulsive? The answer used to be raging hormones plus a dearth of(短缺) life experiences. But three years ago this simple equation was blown apart by evidence from brain scans of strange goings-on behind the teenage forehead. Till then, scientists had thought the brain's internal structure was fixed by the end of childhood. The new scans showed the brain's frontal cortex(皮层) thickening just before puberty(青春期), then slowly shrinking back to normal during the teenage years. Suddenly, the erratic huffiness(发怒) seemed to make sense: the teenage brain was a work in progress, a house in the process of being rewired. Now comes more evidence of neural turmoil. According to psychologists in California, the speed with which youngsters can read the emotional expressions on people's faces dips suddenly at around the age of 11 or 12 and takes years to get back on track. The latest study, like the brain scan research before it, is a welcome and necessary part of building up a picture of a typical teenage brain so that scientists can get a better handle on what might be happening in the mental illnesses that appear to be afflicting children and adolescents in ever greater numbers. But there are dangers. Scientists still have no idea how to interpret the subtle changes seen in adolescent brain scans. Yet in the wrong hands, these findings could be used to justify hothousing, impulse control training and other dubious attempts to get the most out of malleable teenage brain cells. The science could also spark a new wave of moralising based on a perceived need to protect teenagers' evolving brain connections from evil or toxic influences. Incredibly, some scientists have already suggested in the press that the brain scan evidence somehow proves that it is biologically bad for teenagers to play video games or lie on the couch watching MTV. A hundred years, ago one well-known "expert" urged teenage boys to drink six to eight glasses of hot water a day to flush impure thoughts from their bodies. Have we really learned so little?

单选题The election will be brought forward to June as so many people are on holiday in July.

单选题Woman: What can I do for you?Man: I would like to get my money work for me.Woman: There are two kinds. One is relatively safe but offers a low return on your money, the other promises high profits but that involves considerable speculation. Which one do you prefer?Question: What is the probable relationship between the two speakers?

单选题Man：Jennifer is really pretty, isn't she? Her skin looks so baby smooth! Woman: Well, it's just that she puts lots of make-up on her face. Actually, natural beauty comes from within. Man: Ah, I can smell jealousy in the air! Question: What does the man imply?

单选题Woman: Our work in the language lab has been of great benefit to me. You know when I first took the course, I used to be quite at a loss, I simply couldn't catch what the teacher said.Man: We share the same experience.Question: What does the man mean?

单选题The picture illustrates the compassion the artist has for his native land.

单选题A: Do you mind my smoking here?B: ______

单选题Improving the English ______ of graduate students is actually a demanding undertaking.

单选题A male dental assistant, Miguel Alquicira, is in the minority. 11 he is also part of a special, if little noticed, shift in workplace gender patterns. Over the last decade, men have begun 12 to fields long the province of women. Mr. Alquicira, 21, graduated from high school in a 13 job market, one in which the traditional opportunities, 14 construction and manufacturing, for young men without a college degree had dried up (枯竭). After career consultants told him that 15 fields were growing, he borrowed money for an eight-month training course. 16 then, he has had no trouble finding jobs that pay $12 or $13 an hour. He gave little 17 to the fact that more than 90 percent of dental assistants are women. But then, young men like Mr. Alquicira have come of age in a world of inverted expectations, where women far outpace (超过) men in earning degrees and 18 to hold jobs that have turned out to be, by and large, more 19 , more difficult to outsource, and more likely to grow. "The way I look at it," Mr. Alquicira explained, "is that anything, 20 , that a woman can do, a guy can do."

单选题Is there enough oil beneath the Arctic National Wildlife Refuge (ANWR)to help secure America's energy future? President Bush certainly thinks so. He has argued that tapping ANWR's oil would help ease California's electricity crisis and provide a major boost to the country's energy independence. But no one knows for sure how much crude oil lies buried beneath the frozen earth, with the last government survey, conducted in 1998, projecting output anywhere from 3 billion to 16 billion barrels. The oil industry goes with the high end of the range, which could equal as much as 10% of U.S. consumption for as long as six years. By pumping more than 1 million barrels a day from the reserve for the next two to three decades, lobbyists claim, the nation could cut back on imports equivalent to all shipments to the U.S. from Saudi Arabia. Sounds good. An oil boom would also mean a multibillion-dollar windfall(意外之才) in tax revenues, royalties (开采权使用费)and leasing fees for Alaska and the Federal Government. Best of all, advocates of drilling say, damage to the environment would be insignificant. "We've never had a documented case of an oil rig chasing deer out onto the pack ice," says Alaska State Representative Scott Ogan. Not so fast, say environmentalists. Sticking to the low end of government estimates, the National Resources Defense Council says there may be no more than 3.2 billion barrels of economically recoverable oil in the coastal plain of ANWR, a drop in the bucket that would do virtually nothing to ease America's energy problems. And consumers would wait up to a decade to gain any benefits, because drilling could begin only after much bargaining over leases, environmental permits and regulatory review. As for ANWR's impact on the California power crisis, environmentalists point out that oil is responsible for only 1% of the Golden State's electricity output—and just 3% of the nation's.

单选题The exhibition is designed to facilitate further cooperation between Chinese TV industry and overseas TV industries.

单选题Why is chocolate good for heart and circulation?

单选题The president stated that he would not provide accommodation for the students.

单选题The new aircraft will be ______ to a test of temperatures of -65 and 120.

单选题Institutions of higher education can work out Uelastic/U regulations to attract better students.

单选题The dean can't see you at the moment. He is {{U}}addressing{{/U}} the first-year students in the lecture hall.

单选题Woman: I want to try something in the project. What's your opinion? Man: Well, I prefer to go by the book. At least it is safer, isn't it? Question: What does the man suggest?

单选题Applicants for this company have to be informed of the demands Upeculiar/U to the job.