单选题Some corpses were so badly Udismembered/U that they couldn't be identified as men or women.

单选题When plutonium undergoes fission, its atoms Ubreak/U apart, giving off a great deal of energy

单选题Here is a great irony of 21st century global health: while many hundreds of millions of people lack adequate food as a result of economic inequities, political corruption, or warfare, many hundreds of millions more are overweight to the point of increased risk of diet-related chronic diseases. Obesity is a worldwide phenomenon, affecting children as well as adults and forcing all but the poorest countries to divert scarce resources away from food security to take care of people with preventable heart disease and diabetes. To reverse the obesity epidemic, we must address the fundamental cause. Overweight comes from consuming more food energy than is expended in activity. The cause of this imbalance also is ironically improved prosperity. People use extra income to eat more and be less physically active. Market economies encourage this. They turn people with expendable income into consumers of aggressively marketed foods that are high in energy but low in nutritional value, and of cars, television sets, and computers that promote sedentary behavior. Gaining weight is good business. Food is particularly big business because everyone eats. Moreover, food is so overproduced that many countries especially the rich ones, have far more than they need — another irony. In the United States, to take an extreme example, most adults — of all ages, incomes, educational levels, and census categories — are overweight. The U. S. food supply provides 3800 kilocalories per person per day, nearly twice as much as required by many adults. Overabundant food forces companies to compete for sales through advertising, health claims, new products, larger portions, and campaigns directed towards children. Food marketing promotes weight gain. Indeed, it is difficult to think of any major industry that might benefit if people eat less food; certainly not the agriculture, food product, grocery, restaurant, diet, or drug industries. All flourish when people eat more, and all employ armies of lobbyists to discourage governments from doing anything to inhibit overeating.

单选题Most visitors to that peninsula find the breathtaking scenery, which features the sea and rocks, a great ______. A. threat B. thrill C. thriving D. thrift

单选题Ideally, anatomical investigation consists of a combination of descriptive and experimental approaches. Present-day anatomy involves scrutiny of the structure of organisms at many levels of observation.

单选题______ he was aware of the real meaning of life.

单选题The key to success is remembering that every hurdle crossed is one less hurdle in the ______ of your personal ambition. A. pursuit B. proportion C. promotion D. propulsion

单选题{{B}}Passage 1{{/B}} The man who invented Coca-Cola was not a native Atlantan, but on the day of his funeral every drugstore in town testimonially shut up shop. He was John Styth Pemberton, born in 1831 in Knoxville, Georgia, eighty miles away. Sometimes known as Doctor, Pemberton was a pharmacist who, during the Civil War, led a cavalry troop under General Joe Wheeler. He settled in Atlanta in 1869, and soon began brewing such patent medicines as Triplex Liver Pills and Globe of Flower Cough Syrup. In 1885, he registered a trade- mark for something called French Wine Coca Ideal Nerve and Tonic Stimulant; a few months later be formed the Pemberton Chemical Company and recruited the services of a bookkeeper named Frank M. Robinson, who not only had a good head for figures but, attached to it, so exceptional a nose that he could audit the composition of a batch of syrup merely by sniffling it. In 1886--year in which, as contemporary Coca-Cola officials like to point out, Conan Doyle unveiled Sherlock Holmes and France unveiled the Statue of Liberty-Pemberton unveiled a syrup that he called Coca-Cola. It Was a modification of his French Wine Coca. He had taken out the wine and added a pinch of caffeine, and, when the end product tasted awful, had thrown in some extract of cola nut and a few other oils, blending the mixture in a three-legged iron pot in his back yard and swishing it around with an oar. He distributed it to soda fountains in used beer bottles, and Robinson, with his flowing bookkeeper's script, presently devised a label, on which "Coca-Cola" was writ- ten in the fashion that is still employed. Pemberton looked upon his mixture less as a refreshment than as a headache cure, especially for people whose headache could be traced to over-indulgence. On a morning late in 1886, one such victim of the night before dragged himself into an Atlanta drugstore and asked for a dollop of Coca-cola. Druggists customarily stirred a tea- spoonful of syrup into a glass of water, but in this instance the man on duty was too lazy to walk to the fresh-water tap, a couple of feet off. Instead, he mixed the syrup with some soda water, which was closer at hand. The suffering customer perked up almost at once, and word quickly spread that the best Coca-Cola was a fizzy one.

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单选题He ______ very quickly after his illness.

单选题He had been extremely ______ in dealing with the financial question.

单选题We were four scores left behind with five minutes to go, so the game looked completely ______.

单选题Avian influenza is an infectious disease of birds caused by type A strains of the influenza virus. The disease, which was first identified in Italy more than 100 years ago, occurs worldwide. All birds are thought to be susceptible to infection with avian influenza, though some species are more resistant to infection than others. Infection causes a wide spectrum of symptoms in birds, ranging from mild illness to a highly contagious and rapidly fatal disease resulting in severe epidemics. The latter is known as "highly pathogenic avian influenza". This form is characterized by sudden onset, severe illness, and rapid death, with a mortality that can approach 100%. Fifteen subtypes of influenza virus are known to infect birds, thus providing an extensive reservoir of influenza viruses potentially circulating in bird populations. To date, all outbreaks of the highly pathogenic form have been caused by influenza A viruses of subtypes H5 and H7. Migratory waterfowl—most notably wild ducks—are the natural reservoir of avian influenza viruses, and these birds are also the most resistant to infection. Domestic poultry, including chickens and turkeys, are particularly susceptible to epidemics of rapidly fatal influenza. Direct or indirect contact of domestic flocks with wild migratory waterfowl has been implicated as a frequent cause of epidemics. Live bird markets have also played an important role in the spread of epidemics. Recent research has shown that viruses of low pathogenicity can, after circulation for sometimes short periods in a poultry population, mutate into highly pathogenic viruses. During a 1983-1984 epidemic in the United States of America, the H5N2 virus initially caused low mortality, but within six months became highly pathogenic, with a mortality approaching 90%. Control of the outbreak required destruction of more than 17 million birds at a cost of nearly US$ 65 million. During a 1999-2001 epidemic in Italy, the H7N1 virus, initially of low pathogenicity, mutated within 9 months to a highly pathogenic form. More than 13 million birds died or were destroyed. The quarantining of infected farms and destruction of infected or potentially exposed flocks are standard control measures aimed at preventing spread to other farms and eventual establishment of the virus in a country"s poultry population. Apart from being highly contagious, avian influenza viruses are readily transmitted from farm to farm by mechanical means, such as by contaminated equipment, vehicles, feed, cages, or clothing. Highly pathogenic viruses can survive for long periods in the environment, especially when temperatures are low. Stringent sanitary measures on farms can, however, confer some degree of protection. In the absence of prompt control measures backed by good surveillance, epidemics can last for years. For example, an epidemic of H5N2 avian influenza, which began in Mexico in 1992, started with low pathogenicity, evolved to the highly fatal form, and was not controlled until 1995.

单选题(By the 1980s) more than (two-fifth of) U.S. crop production was exported, (making) U.S. agriculture heavily (dependent) upon international markets.A. By the 1980sB. two-fifth ofC. makingD. dependent

单选题How did it come______(hat you made a lot of mistakes in your homework?

单选题The stream overflowed and the flood______all of the farmland in the are

单选题His theories were so ______ that few could see what he was trying to establish. A. logical B. scholarly C. theoretical D. vague

单选题Her lecture gave us a sense of how empty the universe is, in spite of ______ number of stars within it.

单选题 If a new charter of the rights of people (in the First World, or North, or whatever you like to call the part where people to not on the whole starve) were to be drawn up, there is no doubt that the right to be a tourist, to go to a Spanish beach or to visit places endorsed as being of cultural or scenic interest, would be prominent among its clauses. The mythology of tourism is that of the idyll--of outdoor pleasures, eating, drinking and love-making with neither hangover nor remorse. But whereas the ancient poets knew that idylls were an art form, modern tourists are persuaded to believe that they can be bought for the price of a plane ticket and a hotel room. So it is not surprising that so many tourists look bewildered, dazed, even at times despondent. They are exchanging the comforts of home, where a particular way of living has been laboriously and lovingly created, for the uncertainty of existence in a foreign place, the soullessness of hotels, the wear and tear of constant travel. To be translated suddenly into an unfamiliar environment is an alienating experience, if not an unpleasant trauma. Another reason why tourists in reality do not look as happy as the smiliing figures in the brochures is that the activities open to them, far from liberating, are both limited and unbalanced. Lying on a beach and visiting museums may be fine in their different ways, but to do either continuously for days on end must constitute a kind of hell. The strongest arguments against tourism, however, are based on the damage it does to the countries which are toured against rather than those which tour. The most striking examples are in the "Third World". Cultures which have survived centuries of armed assault have not been able to resist this more insidious form of colonization: the dollar is mightier than the sword. Physical environment and culture may suffer, but the apologists for tourism argue that great economic benefits are produced. This is not the case. At least in Third World countries, most of the foreign money brought in goes straight out again, via the foreign-owned companies which exploit tourism. The jobs created by tourism are for the most part menial and low-paid. In the long term, above all, the effect of reliance on tourism must be to reduce a country to a servile, parasitical condition, selling its past and its image to richer, more dynamic people who are in control of their destiny, and in the end, that of the country they are visiting.