单选题In the wake of such findings, several states are rethinking their plan to open these camps.

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单选题Eating better could help reduce the brain ______, save our memory and keep one alert. A. package B. leakage C. drainage D. shrinkage

单选题 Passage Three The immediate response to the birth of dolly, the sheep, was a revulsion against the idea of using the same technique to clone human beings. But the news had just the opposite effect on an eccentric scientist named Richard Seed, who declared with an eerie bravado that he was going to produce "half-a-dozen bouncing-baby, happy, smiling clones" before the end of the decade. Most scientists dismissed his plan as kooky; several U.S. states and 19 European countries outlawed it. But a year later, Seed insists that he is undeterred. He claims to have a partner, an obstetrician-gynecologist, but he won't name him or the three other scientists who he says make up his team. When pressed, he concedes that his colleagues are currently spending no more than 10 hours a week on the project. After all, they have day jobs. Not so Seed. The unemployed physicist, who has spent a lifetime dabbing in ill-fated ventures, is tying to build support and raise money; he claims to have commitments for $800 000. An impressive start, if true, but still far from the $2.5 million he says is necessary to clone the first human before 2000. While virtually no mainstream scientist believes Seed will succeed, there has been a subtle shift in attitudes since the bearded, big-boned maverick limed into view. Seed put into words what many scientists were thinking, and few were surprised to learn last month that a team in South Korea had begun work on human cloning and even claimed to have produced a four-cell human embryo. Seed is unconvinced. "The [Korean] results are highly suspect," he says. But he recognizes that the world is not waiting for him. "I'll be devastated if someone else does it first," he says. "But I'll get over it. I'd rather see somebody do it than nobody." That way, at least, Seed could pursue his next project-reprogramming DNA to achieve immortality—which he sees as the all-important successor to cloning. So here's a conundrum: which would be stranger, a world full of Richard Seeds, or a world in which Seed never goes away?

单选题Directions: There are 10 questions in this part of the test. Read the passage through. Then, go back and choose one suitable word or phrase marked A, B, C, or D for each blank in the passage. Mark the corresponding letter of the word or phrase you have chosen with a single bar across the square brackets on your machine-scored Answer Sheet. The word "smog" has become a household word in urban China. Smog is an {{U}} {{U}} 1 {{/U}} {{/U}}of greenhouse gases and pollutants that reduce visibility and harm respiratory functions. Smog is typically {{U}} {{U}} 2 {{/U}} {{/U}}cities with high concentrations of cars and factories. The population density, amount of industry and the fuels used {{U}} {{U}} 3 {{/U}} {{/U}}together to have an impact on smog levels. During summer, smog is worse {{U}} {{U}} 4 {{/U}} {{/U}}the production of ozone, the main component of smog, increases in strong sunlight. The important thing to understand about smog is that this kind of pollution is spread out {{U}} {{U}} 5 {{/U}} {{/U}}large distances. Walking, biking or using public transportation can help limit ozone production. {{U}} {{U}} 6 {{/U}} {{/U}}, decreasing household electricity use and keeping your vehicles fuel-efficient reduces {{U}} {{U}} 7 {{/U}} {{/U}}greenhouse gases. Checking tire pressure, oil levels, air filters, and getting regular maintenance help {{U}} {{U}} 8 {{/U}} {{/U}}fuel efficiency. Be sure to use only the fuel recommended in the vehicle's user {{U}} {{U}} 9 {{/U}} {{/U}}. Simple steps like avoiding stop-and-go traffic and reducing vehicle workload decrease smog-related emissions. To lighten the workload, avoid running the air-conditioner, {{U}} {{U}} 10 {{/U}} {{/U}}the engine and carrying heavy objects in the vehicle.

单选题 {{B}}Passage Six {{/B}} Nose has it pretty hard, Boxers flatten them. Doctors rearrange them. People make jokes about their unflattering characteristics. Worst of all, when it comes to smell, no one really understands them. Despite the nose's conspicuous presence, its workings are subtle. Smell, or olfaction, is a chemo-sense, relying on specialized interactions between chemicals and nerve endings. When a rose, for example, is sniffed, odor molecules are carried by the rising air-stream to the top of the nasal cavity, just behind the bridge of the nose, where the tips of the tends of millions of olfactory nerve cells are clustered in the mucous lining. The molecules somehow trigger the nerve ending, white carry the message to the olfactory lobes of the brain. Because smell information then travels to other region of the brain, the scent of a rose can elicit not only a pleasure sensation but emotions and memories as well. Though just how odors stimulate the nerves is unknown, scientists do know that our sense of smell is surprisingly keen capable of distinguishing up to tens of thousands of chemical odors. The laboratory task of isolating the components must of an odor is far from simple .Tobacco smoke, for example, is made up of several thousand different chemicals. Moreover smell by their sources or associations. Description such as "like a wet dog" or "like my elementary school" may convey perceptions but are vastly inadequate for labeling the chemistry involved. To further complicate research, olfaction is connected to other sensations. Besides olfactory nerves, the nasal cavity contains pain-sensitive nerves that perceive sensations such as the kick in ammonia or the burning in chili peppers. Smell also inter-wines with taste to create flavor. A coffee drinker holding his nose while sipping would taste only the bitter in his brew, for taste receptors generally appear limited to bitter, salty, sour, and sweet. The sense of smell is ten thousand times more sensitive than taste and makes subtle distinctions among lemon, chocolate, and many more flavors. So how does the nose manage this sophisticated discrimination? Lack of evidence hasn't kept scientists from speculating. One idea is that every odor molecule vibrates at its own frequency, creating patterns of disturbance in the air similar to the wave patterns produced by sound. According to this theory, the nerves act as receives for the unique vibrations of every odor molecule. The scheme requires no direct contact between the molecule and the nerve cell. Another suggestion is that primary odors, equivalent to the primary colors of vision, underlie all smells and are detected by receptor sites on the olfactory nerves. Different combinations of about thirty basic smells, with labels such as malty, minty, and musky, could form an infinite number of odors. Other scientists think that each smell is its own primary smell. They believe the olfactory nerve endings have specific receptor proteins that bind to each of the chemicals people can sense. This theory, however, calls for thousands of different proteins-none of which has been found. "The science of smell is so empirical," says Robert Gesteland, a neurobiologist at Northwestern University, "there is no predictive base for experiments." Unlike the senses of sight, touch, and hearing, olfaction studies have attracted only a small share of scientific interest. That may change. Researchers hope that unraveling the mystery of smell will advance our understanding of the future, with enough known about smell, it might be possible to endow strange, unappealing but nutritious foods with more familiar odors, perhaps expanding the world's food supply. For the moment, however, what the nose knows it isn't revealing.

单选题The construction of ______ and theories reflects the scientists' interpretation of what has been observed. A. prototypes B. hypotheses C. fantasies D. imaginations

单选题At any ICU in a hospital, there are a few patients who are ______ ill and look hopeless. A. ultimately B. terminally C. drastically D. punctually

单选题Whatdoesthemanmean?A.Hispaperhasbeenpublishedwiththehelpofhisadviser.B.Hispaperhaswonanawardwiththehelpofhisadviser.C.Hispaperhasbeenrevisedbyhisadviser.D.Hispaperhasgottheapprovalfromhisadviser.

单选题The operation was a success and he had excellent prospects for a full recovery.

单选题The challenge for us is to ______ these new states in building a more prosperous future. A. participate B. engage C. commit D. contribute

单选题 Martha Graham's territory of innumerable dances and a self-sufficient dance technique is a vast but closed territory, since to create an art out of one's experience alone is ultimately a self-limiting act. If there had been other choreographers with Graham's gifts and her stature, her word might have seemed a more balanced part of the story of American dance. But as she built her repertory, her own language seemed to shut out all other kinds. Even when an audience thinks it discerns traces of influence from other dance styles, the totality of Graham's theatrical idiom, its control of costumes, lights, and every impulse of the dance makes the reference seen a mirage. Dance is not her main subject. It is only her servant. Graham had achieved her autonomy by 1931. By that time, three giant figures who had invented the new twentieth-century dance were dead: Serger Diaghilev, Anna Pavlova, and Isadora Duncan. Their era ended with them, and their dance values nearly disappeared. Their colleagues Michel Fokine and Ruth St. Denis lived on in American like whales on the beach. During the twenties, Martha Graham and her colleagues had rescued art-dance from vaudeville and movies and musical comedy and all the resonances of the idyllic mode in the United States, but in so doing they closed the channels through which different kinds of dance could speak to one another and these stayed closed for half a century. Modern dance dedicated itself to deep significance. It gave up lightness, it gave up a wealth of exotic color, it gave up a certain kind of theatrical wit and that age-old mobile exchange between a dancer and the dancer's rhythmical and musical material. No material in modern dance was bodies. Modern dance excluded its own theatrical traditions of casual play, gratuitous liveliness, the spontaneous pretense, and the rainbow of genres that had formed it. But all these things survived in the public domain, where they had always lived, and they have continued to surface in American dance, if only by accident.

单选题In the light of the current news his argument seems to be well grounded and convincing. A. On account of B. By means of C. With regard to D. In view of

单选题As the elevator is ______, you have to walk upstairs to my office. A. out of stock B. out of order C. out of mind D. out of place

单选题This girl spent little time on experiments, yet she ______ completed her thesis as scheduled. A. somehow B. however C. additionally D. hardly

单选题The Environmental Protection Agency has put forward what ______ the most serious government warning to date. A. adds to B. objects to C. occurs to D. amounts to

单选题Teenagers can become ______ and hard to handle if every single decision is taken away from them. A. obedient B. cooperative C. rebellious D. aesthetic

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单选题Singapore's Mixed Reality Lab is working on new ways of interacting with computers, including wearable devices and virtual war room that will allow officials to work together online as if they were all in one place. Its director is a spiky-haired Australian, a postmodern match for the fictional British agent James Bond's tool man, O. It is funded by the Defense Science & Technology Agency, which controls half the $ 5 billion defense budget, and sponsors hundreds of research projects every year. The agency came to worldwide attention last year when it took just one day to customize a thermal scanner in order to detect travelers with high fever, helping to stem the spread of SARS. DSTA is now working on a range of projects that are attracting attention in both the commercial and military worlds. It devised an air-conditioning system that harnesses melting ice and cool seawater to conserve electricity at the new Changi Naval Base, and could have broad civilian applications. Singapore can easily afford Western hardware, but off-the-shelf products are often unsuitable for the tropical conditions in Southeast Asia. For example, the DSTA is funding development of an anti-chemical-weapons suit that works not as a shield, but as a sort of weapon. The Singapore garments, made of a revolutionary plastic-like material that is much lighter and cooler than traditional fabrics, actually degrade suspect substance on contact. Much of the agency's work is geared toward helping this resource-poor city-state overcome its natural limitations, says its director R&D, William Lau Yue Khei. Conserving manpower is one of the agency's most critical assignments, because Singapore is a nation of 5 million people dwarfed by larger neighbors, including Indonesia and Malaysia. Right now, the biggest DSTA project is computerizing a stealth warship so that it can run on half the usual crew. Making equipment lighter is a particular agency specialty, because the universal military rule of thumb is that a soldier should carry no more than one third his body weight, and that seems that smaller Singaporean soldiers should carry no more than 24 kilos, or 20 percent less than Europeans, says DSTA project manager Choo Hui Weing One such program: the Advanced Combat Man System, has produced a lightweight handguard that controls an integrated laser range finder, digital compass and a targeting camera. Top that, Q.