单选题How they can {{U}}curb{{/U}} the spread of the habit remains a question. A. control B. prevent C. quicken D. promote

单选题Ten years ______ her career as a lawyer, she decided to start her own firm in Chicago. A．within B．during C．into D．amid

单选题According to the U.S. National Highway Traffic Safety Administration (NHTSA), car crashes are the leading cause of death among children (41) 5 and 14 years of age. Says NHTSA: "Over 50% of children who die in crashes are (42) by safety devices. (43) , 4 out of 5 children are improperly restrained." The NHTSA offers a number of safety tips and (44) for those who are accompanied by children while driving. Although laws (45) from country to country and even from state to state, these guidelines may (46) food for thought to many parents and guardians of children. Please check your local laws and do (47) you can to keep your precious baby safe. The safest place for all children is in the back seat. Infants should be (48) in a rear-facing safety seat in the backseat of the car. A child at least a year old and (49) at least 20 pounds may be placed in a forward-facing seat. At 40 pounds, the child can use a "booster seat", which is secured by one of the car's lap and shoulder (50) . At approximately 80 pounds and a height of about four feet nine inches, the child may begin using an adult safety belt.

单选题Our family stood in silence for a minute looking at the amazingly beautiful photograph of a human flag.

单选题Experts hope the plane's flight recorder will ______ the cause of the air crash. A. make sense of B. let go of C. shed light on D. fit in with

单选题The prevailing wind is the wind direction most often observed during a given time period. Wind speed is the rate at which the air moves past a {{U}}stationary{{/U}} object. A. motionless B. massive C. flexible D. noticeable

单选题It was a tragic love affair that only gave rise to pain. A. brought forward B. brought about C. brought down D. brought in

单选题Around the Spring Festival, a {{U}}prevailing{{/U}} practice is to exchange greetings and visits. A. prevalent B. populous C. preceding D. present

单选题Businesses of all sizes possess some type of ______ culture consisting of a set of values and goals. A. desperate B. corporate C. deliberate D. moderate

单选题Passage Three The human body contains enormous quantities of energy. In fact, the average adult has as much energy stored in fat as a one-ton battery. That energy fuels our everyday activities, but what if those actions could in turn run the electronic devices we rely on? Today, innovators around the world are banking on our potential to do just that. Movement produces kinetic energy (动能), which can be converted into power. In the past, devices that turned human kinetic energy into electricity, such as hand-cranked radios, computers and flashlights, involved a person's full participation. But a growing field is tapping into our energy without our even noticing it. Consider, for example, a health club. With every step you take on a treadmill and with every muscle curl, you turn surplus calories into motion that could drive a generator and produce electricity. The energy from one person's workout may not be much, but 100 people could contribute significantly to a facility's power needs. That's the idea behind the Green Microgym in Portland, Oregon, where machines like stationary bikes harvest energy during workouts. Pedaling turns a generator, producing electricity that helps to power the building. For now, body energy supplies only a small fraction of the gym's needs, but the amount should increase as more machines are adapted. "By being extremely energy-efficient and combining human power, solar and someday wind, I believe we'll be able to be net-zero for electricity sometime this year," says the gym's owner, Adam Boesel. His bikes, by the way, aren't the first to put pedal power to work. In some parts of the world, cyclists have been powering safety lights for years with devices called bicycle dynamos, which use a generator to create alternating current with every turn of the wheels. Dance clubs are also getting in on the action. In the Netherlands, Rotterdam's new Club WATT has a floor that harnesses the energy created by the dancers' steps. For now, it's just enough to power LED lights in the floor, but in the future, more output is expected from newer technology.

单选题 It began as just another research project, in this case to examine the effects of various drugs on patients with a severe mood disorder. Using an advanced brain scanning technology--the clumsily named echo-planar magnetic resonance spectroscopic imaging (磁共振光谱成像 ) procedure, or EP-MRSI--researchers at Boston's McLean Hospital scanned the medicated and un-medicated brains of 30 people with bipolar disorder in order to detect possible new treatments for the more than 2 million American adults who suffer from the disease. But something unexpected happened. A patient who had been so depressed that she could barely speak became {{U}}ebullient{{/U}} after the 45-minute brain scan. Then a second patient, who seemed incapable of even a smile, emerged actually telling jokes. Then another and another. Was this some coincidence? Aimee Parow, the technician who made these observations didn't think so. She mentioned the patients' striking mood shifts to her boss, and together they completely refocused the study: to see if the electromagnetic fields might actually have a curative effect on depressive mood. As it turns out, they did. As reported last month in the American Journal of Psychiatry, 23 of the 30 people who were part of the study reported feeling significantly less depressed after the scan. The most dramatic improvements were among those who were taking no medication. The researchers are cautious. Says Bruce Cohen, McLean's president and psychiatrist in chief: "I want to emphasize that we are not saying this is the answer but this is a completely different approach in trying to help the brain than anything that was done before." It's a completely different approach because of the way the magnetism is applied to the brain. But it's an example of new research on an old idea: that the brain is an electromagnetic organ and that brain disorders might result from disorder in magnetic function. The idea has huge appeal to psychiatrists and patients alike, since for many people the side effects of psychiatric (精神的 ) drugs are almost as difficult to manage as the disease itself. And 30 percent of the nearly 18.8 million people who suffer from depression do not respond to any of the antidepressants available now. People with other severe mental disorders might benefit as well. And while no one fully understands exactly why or how the brain responds as it does to electrical currents and magnetic waves, fascinating new research is offering some possible explanations.

单选题Experts offer health ______ as kids will be returning to the classroom this week. A. slips B. tips C. gossips D. clips

单选题If there is the need to compete in a crowd, to battle ______ the edge the surest strategy is to develop the unexpected.

单选题While I could not ______ the words outside the thick glass windows, their middle fingers spoke loudly.

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单选题WhatdidElizabethPeabodydowhenshefoundedthefirstkindergartenintheUnitedStates?A.Sheinvitededucationalreformerstoteachinherschool.B.SheinvitedteachersfromGermanytoworkinherschool.C.ShewenttoGermanytofindstaffforherschool.D.Sheaskedfamousscholarstoteachthestaffinherschool.

单选题Because of the struggle put up by the Women's Lib, many women have found good careers.

单选题Directions: In this part of the test, there are six short passages. Read each passage carefully, and then do the questions that follow. Passage One The best things in life are free, and that includes air and water. Swimming and breathing usually don't cost anything, but neither does throwing away garbage. Since dumping pollution into the environment costs nothing, everybody does it, even though he may wish that he and everyone else would stop doing it. Clean air and water have not been recognized by the market as limited resources that can only absorb so much junk before they start spitting it back—exactly what had started happening by the early 1960s. The solution is to put a price on the use of these limited resources and stop classifying them as "free". Protection of air and water have to be brought into the market system. Very early on, then, the problem was properly diagnosed. But that was exactly the problem. The dilemma we faced was just that: how do you put a price on clean air—or at least on the act of fouling it while disposing of society's wastes? Yet in there reluctance to perceive their concern as one of mere economics, environmentalists rejected this approach. It failed to match the religiosity of their cause. Instead, they supported a highly centralized, bureaucratic system based on difficult goals, detailed regulatory prescriptions, and awe-inspiring penalties for noncompliance. The way the Clean Air Act of 1970 affected industry has more or less passed into legend. It is not that it did not produce results. Air pollution has declined in many areas, and has increased in only a few. The real question is the costs that were incurred in the process. The major problem with the Clear Air Act is that it lays the burden of costs only on the people who make the effort to clean up. (The large fines were intended mainly as a threat, and are rarely imposed.) No one has yet put a price on using clean air as a dumping ground. The only standards for deciding who cleans up and who doesn't are the necessarily arbitrary decisions arrived at by the state environmental agencies. Each industry, therefore, has every incentive to spend years in litigation trying to prove that it is someone else's pollution that is at fault.

单选题The politician urged that every citizen______to the polls on the Election Day.

单选题The staggering sum of money invested in this project failed to yield the desired result.