单选题The government decided to lake a ______action to slrengrhen the market management (2007年清华大学考博试题)

单选题Largely due to the university tradition and the current academic milieu, every college student here works ______(2005年清华大学考博试题)

单选题Thus the question of why Jefferson didn't free his slaves only A serves to illustrate how presentism B involves us in mistaken assumptions about historical conditions—in this case that an eighteenth-century slaveholder wanting to get out from under the moral stigma of slavery and C improving the lot of his slaves D had only to set them free.

单选题We are a peaceful community but we cannot ______ and allow the people responsible to destroy the fabric of our society.

单选题Tom ran from the house in a terrible rage, his arms ______in the air.

单选题The little girl wore a very thin coat. A sudden gust of cold wind made her ______ A. whirl B shift C. shiver D. shake

单选题All at once Hazel was coming in through the French windows, pulling off gardening gloves, and Bill was entering through the door, both at once. So I only had time to take one quick look at her before I turned to face him. All very confusing. What that first glimpse showed me was that time had thickened her figure but didn"t seem to have made much difference to her face. It still had good skin and youthful outlines. She was holding a bunch of roses—must have been cutting them in the garden while waiting for me. The gardening gloves lent a delightfully informal touch. It was quite an entrance, though Bill spoilt it a bit by making his at the same time. Bill seemed longer and thinner. His tightly massed hair had a tinge of grey. Apart from that, twenty years had done nothing to him, except deepen the lines of thoughtfulness that had already, when I knew him, begun to spread across his face. Or was that all? I looked at him again, more carefully, as he looked away from me at Hazel. Weren"t his eyes different somehow? More inward-looking than ever? Gazing in not merely at his thoughts, but at something else, something he was keeping hidden or perhaps protecting. Then we were chattering and taking glasses in our hands, and I came back to earth. For the first ten minutes we were all so defensive, so carefully probing, that nobody learnt anything. Bill had forgotten me altogether, that much was clear. He was engaged in getting to know me from scratch, very cautiously so as not to hit a wrong note, with the object of getting me to contribute a big subscription to his African project. I kept trying to absorb details about Hazel, but Bill was talking earnestly about African education, and the strain of appearing to concentrate while actually thinking about his wife proved so great that I decided it would be easier just to concentrate. So I did. I let him hammer away for about ten more minutes, and then the daughter, who seemed to be acting as parlour-maid, showed in another visitor. Evidently we were to be four at lunch.

单选题 She has been handling all the complaints without wrath for a whole morning.

单选题Once a picture is proved to be a forgery, it becomes quite ______.(2008年北京大学考博试题)

单选题Settled by English Puritans in 1630, Boston became______.

单选题Rubidium, potassium and carbon are three common elements used to date the history of Earth. The rates of radioactive decay of these elements are absolutely regular when averaged out over a period of time; nothing is known to change them. To be useful as clocks, the elements have to be fairly common in natural minerals, unstable but decay slowly over millions of years to form recognizable "daughter" products which are preserved minerals. For example, an atom of radioactive rubidium decays to form an atom of strontium (another element) by converting a neutron in its nucleus to a proton and releasing an electron, generating energy in the process. The radiogenic daughter products of the decay-in this case strontium atoms--diffuse away and are lost above a certain very high temperature. So by measuring the exact proportions of rubidium and strontium atoms that are present in a mineral, researchers can work out how long it has been since the mineral cooled below that critical "blocking" temperature. The main problems with this dating method are the difficulty in finding minerals containing rubidium, the accuracy with which the proportions of rubidium and strontium are measured, and the fact that the method gives only the date when the mineral last cooled below the blocking temperature. Because the blocking temperature is very high, the method is used, mainly for recrystallized (igneous or metamorphic) rocks, not for sediments--rubidium-bearing minerals in sediments simply record the age of cooling of the rocks which were eroded to form the sediments, not the age of deposition of the sediments themselves. Potassium decays to form (a gas) which is sometimes lost from its host mineral by escaping through pores. Although potassium-argon dating is therefore rather unreliable, it can sometimes be useful in dating sedimentary rocks because potassium is common in some minerals which form in sediments at low temperatures. Assuming no argon has escaped, the potassium-argon date records the age of the sediments themselves. Carbon dating is mainly used in archaeology. Most carbon atoms (carbon-12) are stable and do not change over time. However, cosmic radiation bombarding the upper atmospheres constantly interacting with nitrogen in the atmosphere to create an unstable form of carbon, carbon-14.

单选题Suzan Fellman had a hard time with Laura Bush's redo of the famed guest quarters named for President Lincoln: "Looking at it, I thought I was in a Radisson lobby somewhere in the Midwest long ago. I could not imagine spending a night in that space." Done up with Victorian furnishings, the Lincoln Bedroom is one of the residence's least-changed spaces, said Betty Monkman, formerly chief curator of the White House for nearly 40 years. "It's a quasi-museum room," she said, "with a lot of objects, such as the bed, that have symbolic importance." The elaborately carved bed bought for Lincoln is the centerpiece of the room. According to historian William Scale, the president was furious that his wife, Mary, spent so much money redecorating the White House during a time of war. He never slept in the bed, and the ornate piece eventually was moved to a spare room. Los Angeles designer Fellman saw parallels, calling the Obama era a period of "pulling back on extravagance." It is a good time, she said, to revisit pieces in storage, to rearrange old furniture in a new fashion, and use paint and fabrics to bring life and fun into a room without spending a fortune. In this re-imagining of the Lincoln Bedroom, Fellman would retain the legendary bed but paint the ceiling a sky blue and use a Cecil Beaton rose-print fabric for curtains. "Lincoln loved roses," Fellman said, "and this beige and ivory version keeps it from being too bold, modern or feminine." At a time when Americana is expected to stage a strong revival, Fellman said traditional styles such as Colonial and Federal can co-exist with European antiques if they are balanced in scale. Mindful of the recession, the designer advocated selecting furniture with longevity in mind. "If you are going to spend money, buy quality things that you never want to get rid of," she said. "A couple of really good things can make all the difference in a room." Her splurges would include a camel-hair sofa, which Fellman said was long-lasting and timeless. As a Pop Art-influenced statement about thrift, a custom rug woven with a 6-foot-diameter medallion replicates the penny's image of Lincoln in subtle shades of ivory and copper. In bad times as in good, spare rooms don't have to be grand to be effective, Fellman said. "A guest room should feet inviting and intimate," she said "It has to exude serenity./

单选题Passage 4 As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the habit of rushing through life and working from morning till night, it is hard to slow down. But relaxation is essential for a healthy mind and body. Stress is a natural part of everyday life and there is no way to avoid it. In fact, it is not the bad thing it is often supposed to be. A certain amount of stress is vital to provide motivation and give purpose to life. It is only when the stress gets out of control that it can lead to poor performance and ill health. The amount of stress a person can withstand depends very much on the individual. Some people are not afraid of stress and such characters are obviously prime material for managerial responsibilities. Others lose heart at the first signs of unusual difficulties. When exposed to stress, in whatever form, we react both chemically and physically. In fact we make choice between "flight or fight" and in more primitive days the choices made the difference between life or death. The crises we meet today are unlikely to be so extreme, but however little the stress, it involves the same response. It is when such a reaction lasts long, through continued exposure to stress, that health becomes endangered. Such serious conditions as high blood pressure and heart diseases have established links with stress. Since we cannot remove stress from our lives it would be unwise to do so even if we could, we need to find ways to deal with it.

单选题The worsening financial situation made it obvious that an economic depression was ______.