单选题Doctors must inform______parents about the low odds of success in fertility treatments.(中国科学院2008年试题)

单选题The conquerors stole not only the gold and silver that were needed to replenish the badly depleted treasure but also the supplies that were vital to the nation.

单选题To cream a circuit, a conducting wire is attached to an electric cell at one end, and to an electric outlet at the other.

单选题When the doctor proposed to him long walks in the fresh air, Mr. Park admitted ______ for a long walk for years.

单选题______Mr. Hall admits that he pushed too hard, and ultimately his efforts failed.(2013年10月中国科学院考博试题)

单选题The aim of controlled scientific experiments is ______.

单选题I wish I ______ to the movies with you last night. A. have gone B. could go C. could have gone D. went

单选题Because I find that hot summer weather ______ me and leaves me very tired, I try to leave the city every August and go to Maine.

单选题The author states that the mitigating effect of social programs involving income transfers on the income level of low-income people is often not felt by

单选题They waited in the ______ for the front door to open.

单选题The table before which we sit may be, as the scientist maintains, composed of dancing atoms, but it does not reveal itself to us as anything of the kind, and it is not with dancing atoms but a solid and motionless object that we live. So remote is this "real" table--and most of the other "realities" with which science deals--that it cannot be discussed in terms which have any human value, and though it may receive out purely intellectual credence it cannot be woven into the pattern of life as it is led, in contradistinction to life as we attempt to think about it. Vibrations in the either are so totally unlike, let us say, the color purple that the gulf between them cannot be bridged, and they are, to all intents and purposes, not one but two separate things of which the second and less "real" must be the most significant for us. And just as the sensation which has led us to attribute an objective reality to a nonexistent thing which we call "purple" is more important for human life than the conception of vibrations of a certain frequency, so too the belief in God, however ill founded, has been more important in the life of man than the germ theory of decay, however true the latter may he. We may, if we like, speak of consequence, as certain mystics love to do, of the different levels or orders of truth. We may adopt what is essentially a Platonist trick of thought and insist upon postulating the existence of external realities which correspond to the needs and modes of human feeling and which, so we may insist, have their being is some part of the universe unreachable by science. But to do so is to make an unwarrantable assumption and to be guilty of the metaphysical fallacy of failing to distinguish between a truth of feeling and that other sort of truth which is described as a "truth of correspondence," and it is better perhaps, at least for those of us who have grown up in an age of scientific thought, to steer clear of such confusions and to rest content with the admission that, though the universe with which science deals is the real universe, yet we do not and cannot have any but fleeting and imperfect contacts with it ; that the most important part of our lives-our sensations, emotions, desires, and aspirations-takes place in a universe of illusions which science can attenuate or destroy, but which it is powerless to enrich.

单选题Women have significant advantages over men in space because they need less food and less oxygen and they ______ radiation better.

单选题Nanotechnology, according to its fans, will jump-start a new industrial revolution with molecular-sized structures as complex as the human cell and 100 times stronger than steel. The new technology transforms everyday products and the way they are made by manipulating atoms so that materials can be shrunk, strengthened and lightened all at once. To date only modest nanotech-based products--such as stain-resistant fabrics and fresh food packaging--have entered the market, but some scientists predict nanotechnology will eventually be the only game in town. "It will be a ubiquitous technology," said George Stephanopoulos, professor of chemical engineering at the Massachusetts Institute of Technology. He echoes other nanotech supporters who say industrial countries are already sliding toward its use in every aspect of manufacturing. Aided by recent advances in microscopes, scientists can now place single atoms where they want for the first time. The potential applications are numerous, with microscopic computers, cancer-killing antennae and nonpolluting car engines on the distant horizon. When it's all going to happen, though, is another matter. According to most scientific accounts, the nanotech future may be 10 to 20 years off. Major hurdles need to be jumped. First, there is a lack of economic mass production. Some of the more complicated devices would require exact placement of billions of atoms. "It may take the lifetime of the universe to complete the construction of (such a)device, " said George Barbastathis, assistant professor at NIT. Another challenge is bridging the nanoscale and macroscopic, he said. In other words, the smallness of a nano device is useless when it must be attached to large wires. It's unclear how scientists will overcome these problems. And fears derived from science fiction threaten to derail nano-technology even as it emerges, in much the same way popular anxiety over "super-weeds" and "frankenfoods" have hobbled biotechnology in agriculture and fear of "designer babies" has set back stem-cell research. Lured by a market with billions of dollars in potential profits, giants like GE, Intel, Motorola and IBM are already heavily involved in research. Worldwide, the two, industries with the potential to win big with nanotechnology are electronics and biotechnology, according to MIT researchers. On the biotech front, scientists are promoting the notion of nanoparticles made from gold that could be triggered remotely to heat and kill individual cancer cells. Nanotechnology holds equal promise for wealth creation, but there isn't a consensus among venture capitalists on how to realize it. "Which direction is it going to work out in? That's the question on everyone's mind," Gang Chen, an associate professor at the MIT, told scientists at a Boston nano gathering.

单选题That war robbed him of the______of his career, when he was the best player in the world. A. prejudice B. preference C. privilege D. prime

单选题{{B}}Passage Three{{/B}} The current political debate over family values personal responsibility, and welfare takes for granted the entrenched American belief that dependence on government assistance is a recent and destructive phenomenon. Conservatives tend to blame this dependence on personal irresponsibility aggravated by a swollen welfare apparatus that saps individual initiative. Liberals are more likely to blame it on personal misfortune magnified by the harsh lot that falls to losers in our competitive market economy. But both sides believe that "winners" in America make it on their own that dependence reflects some kind of individual or family failure, and that the ideal family is the self-reliant unit of traditional lore--a family that takes care of its own, carves out a future for its children, and never asks for handouts. Politicians at both ends of the ideological spectrum have wrapped themselves in the mantle of these "family values" arguing over why the poor have not been able to make do without assistance, or whether aid has exacerbated their situation, but never questioning the assumption that American families traditionally achieve success by establishing their independence from the government. The myth of family self-reliance is not compelling that our actual national and personal histories often buckle under its emotional weight. "We always stood on our own two feet", my grandfather used to say about his pioneer heritage, whenever he walked me to the top of the hill to survey the property in Washington State that his family had bought for next to nothing after it had been logged off in the early 1900s. Perhaps he didn't know that the land came so cheap because much of it was part of a federal subsidy originally allotted to the railroad companies, which had received 183 million acres of the public domain in the nineteenth century. These federal giveaways were the original source of most major western logging companies' land, and when some of these logging companies moved on to virgin stands of timber, federal lands trickled down to a few early settlers who were able to purchase them inexpensively. Like my grandparents, few families in American history--whatever their "values" have been able to rely solely on their own resources. Instead, they have depended on the legislative, judicial and social support structures set up by governing authorities, whether those authorities were the clan elders of Native American societies, the church courts and city officials of colonial America, or the judicial and legislative bodies established by the Constitution. At America's inception, this was considered not a dirty little secret but the norm, one that confirmed our social and personal interdependence. The idea that the family should have the sole or even primary responsibility for educating and socializing its members, finding them suitable work, or keeping them from poverty and crime was not only ludicrous to colonial and revolutionary thinkers but dangerously parochial.

单选题Of all the components of a good night"s sleep, dreams seem to be least within our control. In dreams, a window opens into a world where logic is suspended and dead people speak. A century ago, Freud formulated this revolutionary theory that dreams were the disguised shadows of our unconscious desires and fears; by the late 1970s, neurologists had switched to thinking of them as just "mental noise"—the random byproducts of the neural-repair work that goes on during sleep. Now researchers suspect that dreams are part of the mind"s emotional thermostat, regulating moods while the brain is "off-line". And one leading authority says that these intensely powerful mental events can be not only harnessed but to help us sleep and feel better. "It"s your dream," says Rosalind Cartwright, chair of psychology at Chicago"s Medical Center, "If you don"t like it, change it." Evidence from brain imaging supports this view. The brain is as active during REM (rapid eye movement) sleep—when most vivid dreams occur—as it is when fully awake, says Dr. Eric Nofzinger at the University of Pittsburgh. But not all parts of the brain are equally involved; the limbic system (the "emotional brain") is specially active, while the prefrontal cortex (the center of intellect and reasoning) is relatively quiet. "We wake up from dreams happy or depressed, and those feelings can stay with us all day," says Stanford sleep researcher Dr. William Dement. The link between dreams and emotions shows up among the patients in Cartwright"s clinic. Most people seem to have more bad dreams early in the night, progressing toward happier ones before awakening, suggesting that they are working through negative feelings generated during the day. Because our conscious mind is occupied with daily life we don"t always think about the emotional significance of the day"s events—until, it appears, we begin to dream. And this process need not be left to the unconscious. Cartwright believes one can exercise conscious control over recurring bad dreams. As soon as you awaken, identify what is upsetting about the dream. Visualize how you would like it to end instead; the next time it occurs, try to wake up just enough to control its course. With much practice people can learn to, literally, do it in their sleep. At the end of the day, there"s probably little reason to pay attention to our dreams at all unless they keep us from sleeping or "we wake up in panic," Cartwright says. Terrorism, economic uncertainties and general feelings of insecurity have increased people"s anxiety. Those suffering from persistent nightmares should seek help from a therapist. For the rest of us, the brain has its ways of working through bad feelings. Sleep—or rather dream—on it and you"ll feel better in the morning.

单选题{{B}}Directions:{{/B}} There are 4 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark your answer on the ANSWER SHEET by blackening the corresponding letter in the brackets.{{B}}Passage One{{/B}} Distance education is enrollment and study with an educational institution that provides lesson materials prepared in a sequential and logical order for study by students on their own. When each lesson is completed, the student mails or transmits the assigned work to the institution for correction, grading, comment, and subject matter guidance by qualified instructors. Corrected assignments are returned promptly to the student. This exchange provides a personalized student-teacher relationship. If a student slows his or her pace or fails to send assignments, the school provides encouragement. Although some institutions provide employment placement information and assistance, no reputable school ever guarantees a job to graduates. Distance education and self-study are different. Self-study materials provide no instructional service. Corrected assignments, examinations, and special help provided by a qualified facility are vital to a good learning situation. However, these are not part of self-study. There are many self-study courses and recordings available, and they may have value, but they clearly are not correspondence or distance education courses. Some institutions offer combination courses that provide training-in-residence for students who complete their distance education lessons. In-service or on-the-job training is required or provided with other courses and is a feature of many vocational distance education programs. Quality distance education institutions screen prospective students to assure that only those who can benefit from the courses are enrolled. While there are educational prerequisites for some academic subjects, interest and aptitude are the primary factors leading to success in most distance education courses. Because they provide alternative educational opportunities, distance education institutions try not to deny a prospective student the opportunity to succeed in a course—interest and experience are good indicators of future success. Distance education courses vary greatly in scope, level, and length. Some have few lessons and require only weeks to complete, while others have a hundred or more assignments requiring three or four years of conscientious study. Also, a wide variety of subjects is offered. Subjects include yacht design, accounting, medical transcription, nutrition, robotics, travel agent training, gun-repair, gem identification, computer programming, catering and cooking, and earning an entire high school diploma, just to name a few. There is an increasing recognition of "distance education" and many colleges offer credit for their distance learning courses or accept some distance education credits of resident students working toward a degree. In fact, many distance education institutions award their own academic degrees. Acceptance of students and awarding of academic credit is the prerogative of the receiving academic institution. Also, the employing organization may set its own credit acceptance policies.

单选题That she seemed to prefer dabbling to concentrated effort is undeniable; nevertheless, the impressive quality of her finished paintings suggests that her actual relationship to her art was anything but______.

单选题No one could come up with an easy solution to the government's predicament—labor ______ which is caused by the wars. [A] decline [B] vacancy [C] rarity [D] shortage

单选题Her voice is child-like, with a West Country______. A. tilt B. lilt C. lobe D. loft