单选题After walking for hours without finding the village, we began to have ______ about our map. A. troubles B. fears C. limitations D. misgivings

单选题The passage suggests that if there were a slight global warming at the present time, it would be ______.

单选题The statement was an allusion to recent troubles with the agency's computers. A. an explanation B. a contradiction C. a reference D. a rejection

单选题Your letters ______ those pleasant days when we worked together, I'll remember forever.

单选题After “9.11”, the Olympic Games severely Utaxed /Uthe security services of the host country.

单选题The popular idea that classical music can improve your maths is falling from favor. New experiments have failed to support the widely publicized finding that Mozart's music promotes mathematical thinking. Researchers reported six years ago that listening to Mozart brings about short-term improvements in spatial-temporal reasoning, the type of thinking used in maths. Gordon Shaw of the University of California at Irvine and Frances Rauscher of the University of Wisconsin in Oshkosh had asked students to perform spatial tasks such as imagining how a piece of paper would look if it were folded and cut in a certain pattern. Some of the students then listened to a Mozart sonata and took the test again. The performance of the Mozart group improved. Shaw found. He reasoned that listening to Mozart increases the number of connections between neurons. But Kenneth Steele of Appalachian State University in North Carolina learnt that other studies failed to find this effect. He decided to repeat one of Shaw's experiments to see for himself. Steele divided 125 students into three groups and tested their abilities to work out how paper would look if cut and folded. One group listened to Mozart another listened to a piece by Philip Glass and the third did not listen to anything. Then the students took the test again. No group showed any statistically significant improvement in their abilities. Steele concludes that the Mozart effect doesn't exist. "It's about as unproven and as unsupported as you can get," he says. Shaw however defends his study. One reason he gives is that people who perform poorly in the initial test get the greatest boost from Mozart but Steele didn't separate his students into groups based on ability. "We're still at the stage where it needs to be examined," Shaw says. "I suspect that the more we understand the neurobiology, the more we'll be able to design tests that give a robust effect. "

单选题In theory, millions of people suffering devastating diseases may one day be helped or even cured with treatments derived from human embryonic stem cells, but human embryos must be destroyed to obtain these stem cells. So research involving them is ______ in controversy, with each side arguing passionately for the rights of the sick or the rights of the unborn. A. refuted B. modified C. marred D. mired

单选题D. briefed

单选题Eighty percent of mothers cradle their ______ in their left arms, holding them against the left side of their bodies. A. infants B. hoses C. handkerchiefs D. fences

单选题The terrible noise is______me mad.(2003年西南财经大学考博试题)

单选题The chimney vomited a cloud of smoke.

单选题He ______ himself bitterly for his miserable behavior that evening. A. repealed B. resented C. replayed D. reproached

单选题"De you mind ______?" "Go ahead. I don't mind."

单选题 Directions: In this section you will read four passages. Each one is followed by several questions about it. For questions, you are to choose the one best answer A, B, C, or D to each question.{{B}}Passage One{{/B}} In a recent book entitled The Psychic Life of Insects, Professor Bouvier says that we must be careful not to credit the little winged fellows with intelligence when they behave in what seems like an intelligent manner. They may be only reacting. I would like to confront the professor with an instance of reasoning power on the part of an insect which cannot be explained away in any other manner. During the summer of 1899, while I was at work on my doctoral thesis, we kept a female wasp at our cottage. It was more like a child of our own than a wasp, except that it looked more like a wasp than a child of our own. That was one of the ways we told the difference. It was still a young wasp when we got it (thirteen or fourteen years old) and for some time we could not get it to eat or drink, it was so shy. Since it was a female we decided to call it Miriam, but soon the children's nickname for it-- " Pudge" --became a fixture, and "Pudge" it was from that time on. One evening I had been working late in my laboratory fooling around with some gin and other chemicals, and in leaving the room I tripped over a nine of diamonds which someone had left lying on the floor and knocked over my card index which contained the names and addresses of all the larvae worth knowing in North America. The cards went everywhere. I was too tired to stop to pick them up that night, and went sobbing to bed, just as mad as I could be. As I went, however, I noticed the wasp was flying about in circles over the scattered cards. "Maybe Pudge will pick them up," I said half laughingly to myself, never thinking for one moment that such would be the case. When I came down the next morning Pudge was still asleep in her box, evidently tired out. And well she might have been. For there on the floor lay the cards scattered all about just as I had left them the night before. The faithful little insect had buzzed about all night trying to come to some decision about picking them up and arranging them in the boxes for me, and then had figured out for herself that, as she knew practically nothing of larvae of any sort except wasp larvae, she would probably make more of a mess of rearranging them than if she had left them on the floor for me to fix. It was just too much for her to tackle, and, discouraged, she went over and lay down in her box, where she cried herself to sleep. If this is not an answer to Professor Bouvier's statement, I do not know what is.

单选题The magician made us think he cut the girl into pieces but it was merely an ______. A. illusion B. impression C. image D. illumination

单选题According to psychoanalysis, a person's attention is attracted ______ by the intensity of different signals ______ by their context, significance, and information content.

单选题The brain centers that process numbers seem to be different for exact and______calculations.

单选题 Think of the ocean on a calm day. Ignoring the rise and fall of the waves, you might imagine the surface was dead flat the whole way across. You'd be wrong. Hills and valleys are as much as a feature of the sea as the land, although on a much smaller scale. These undulations have a variety of causes. Tides, currents, eddies, winds, river flow and changes in salinity and temperature push the sea level up in some places and down in others by as much as 2 meters. Ever tried swimming uphill? How do we map these oceanic hills and valleys? First, we need to know what the planet would look like without them. This is where the geoid (大地水准面) comes in. It is a surface where the Earth's gravitational potential is equal and which best fits the global mean sea level. It is approximately an ellipsoid, though uneven distribution of mass within the Earth means that it can vary from this ideal by up to 150 meters. The geoid represents the shape the sea surface would be if the oceans were net moving and affected only by gravity. Thus it can be used as a reference to measure any deviations in the ocean surface height that aren't caused by gravity—the hills and valleys, for instance, or any regional increase in sea level. So how do you measure the geoid and the ocean's irregular topography? It's complicated. Geophysicists calculate the geoid using data on variation in gravitational acceleration from several dozen satellites. The hills and valleys of the oceans are all very interesting, but can the geoid tell us anything more significant about the state of the planet? It certainly can. Knowing accurately where the geoid lies and how the Ocean surface deviates from it will help meteorologists spot changes in Ocean currents associated with climate change. The circumpolar current around Antarctic is one they are particularly interested in. It can also predict local climate variations produced by events such as El Nino, El Nino keeps warm water that would normally move westwards close to the coast of South America, deprives Southeast Asia of its monsoon rains, and increases rainfall on the west coast of the Ametlca. Since temperature changes cause changes in sea level, geoid-watchers should be able to prepare us before it strikes.

单选题Hitler sought to {{U}}annihilate{{/U}} resistance movements throughout Europe.