单选题Ice can be used to keep food from Uspoiling/U.

单选题(2007)Training is provided, so no______experience is required for the job.

单选题Our main concern is to ______ the living standard of the people. A. raise B. rise C. arise D. arouse

单选题Excuse me for ( ) you with such a small matter

单选题Their evidence was convincing but not______.

单选题It is suggested that smoking______in public places.

单选题The box is ______ heavy for the girl ______ carry. A. too, to B. to, too C. so, that D. no, to

单选题Gordon Shaw the physicist, 66, and colleagues have discovered what"s known as the "Mozart effect", the ability of a Mozart sonata, under the fight circumstances, to improve the listener"s mathematical and reasoning abilities. But the findings are controversial and have launched all kinds of crank notions about using music to make kids smarter. The hype, he warns, has gotten out of hand. But first, the essence: is there something abut the brain cells work to explain the effect? In 1978 the neuroscientist Vernon Mountacastle devised a model of the neural structure of the brain"s gray matter. Looking like a thick band of colorful bead work, it represents the firing patterns of groups of neurons. Building on Mountcastle, Shaw and his team constructed a model of their own. On a lark, Xiaodan Leng, who was Shaw"s colleague at the time, used a synthesizer to translate these patterns into music. What came out of the speakers wasn"t exactly toe-tapping, but it was music. Shaw and Leng inferred that music and brain-wave activity are built on the same sort of pattern. "Gordon is a contrarian in his thinking," says his longtime friend, Nobel Prize-Winning Standford Physicist Martin Perl. "That"s important. In new areas of science, such as brain research, nobody knows how to do it." What do neuroscientists and psychologists think of Shaw"s findings? They haven"t condemned it, but neither have they confirmed it. Maybe you have to take them with a grain of salt, but the experiments by Shaw and his colleagues are intriguing. In March a team led by Shaw announced that young children who had listened to the Mozart sonata and studied the piano over a period of months improved their scores by 27% on a test of ratios and proportions. The control group against which they were measured received compatible enrichment course—minus the music. The Mozart-trained kids are now doing math three grade levels ahead of their peers, Shaw claims. Proof of all this, of course, is necessarily elusive because it can be difficult to do a double blind experiment of educational techniques. In a double blind trial of an arthritis drug, neither the study subjects nor the experts evaluating them know which ones got the best treatment and which a dummy pill. How do you keep the participants from knowing it"s Mozart on the CD?

单选题Great ______ the difficulties are, we must do our best to succeed. A. while B. as C. although D. however

单选题 There are few more sobering online activities than entering data into college-tuition calculators and gasping as the Web spits back a six-figure sum, But economists say families about to go into debt to fund four years of partying, as well as studying, can console themselves with the knowledge that college is an investment that, unlike many bank stocks, should yield huge dividends. A 2008 study by two Harvard economists notes that the "labor-market premium to skilr " —or the amount college graduates earned that's greater than what high-school graduates earned—decreased for much of the 20th century, but has come back with a vengeance since the 1980s. In 2005, the typical full-time year-round U.S. worker with a four-year college degree earned $ 50,900, 62% more than the $ 31,500 earned by a worker with only a high-school diploma. There's no question that going to college is a smart economic choice. But a look at the strange variations in tuition reveals that the choice about which college to attend doesn't come down merely to dollars and cents. Does going to Columbia University (tuition, room and board $ 49,260 in 2007-2008) yield a 40% greater return than attending the University of Colorado at Boulder as an out-of-state student( $ 35,542)? Probably not. Does being an out-of-state student at the University of Colorado at Boulder yield twice the amount of income as being an in-state students( $17,380) there? Not likely. No, in this consumerist age, most buyers aren't evaluating college as an investment, but rather as a consumer product—like a car or clothes or a house. And with such purchases, price is only one of many crucial factors to consider. As with automobiles, consumers in today's college marketplace have vast choices, and people search for the one that gives them the most comfort and satisfaction in line with their budgets. This accounts for the willingness of people to pay more for different types of experiences(such as attending a private liberal-arts college or going to an out-of-state public school that has a great marine-biology program). And just as two auto purchasers might spend an equal amount of money on very different cars, college students(or, more accurately, their parents)often show a willingness to pay essentially the same price for vastly different products. So which is it?

单选题She______in the feet on her way home from work. A. was hurting B. is hurt C. hurts D. got hurt

单选题Many a writer of newspaper articles ______ to writing novels. A. has turned B. have turned C. have been turned D. has been turned

单选题At the Kyoto conference on global warming in December 1997, it became abundantly clear how complex it has become to work out international agreements relating to the environment because of economic concerns unique to each country. It is no longer (21) to try to forbid certain activities or to reduce (22) of certain substances. The global challenges of the inter-link between the environment and development increasingly (23) us to the core of the economic life of states. During the late 1980s we were able, through international agreements, to make deep (24) in emissions (25) the ozone layer. These reductions were made possible (26) the harmful substances could be replaced (27) negative effects on employment and the economies of states. Although the threat of global warming has been known to world for decades, we know that the effects of measures, (28) harsh measures taken in some countries, would be nullified if (29) countries do not control their emissions. Important and populous low- or medium-income countries are not (30) willing to undertake legal commitments about their energy uses. We must, (31) find a solution to the threat of global warming early in the 21st century. Such a (32) would require a degree of shared vision and common responsibilities new to humanity. Success lies in the force of imaginations, in imagining what (33) if we failed to act. Although many living in cold regions would welcome the global-warming effect of a warmer summer, (34) would cheer arrival of the (35) tropical diseases, especially where there has been none.

单选题Most people ______.

单选题(Under no circumstances) (he would) (give up) his (writing).

单选题I ______ rather solve the problems in my farm myself than seek the help of other people. A. should B. shall C. would D. will

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