单选题Having decided to rent a flat, we {{U}}commenced{{/U}} contacting all the accommodation agencies in the city.

单选题One of the responsibilities of the Coast Guard is to make sure that all ships strictly follow traffic rules in busy harbors.

单选题His claims seem credible to many people.

单选题People from many places were {{U}}drawn{{/U}} to the city by its growing economy. A. fetched B. carried C. attracted D. pushed

单选题Let"s postulate that she is a lawyer, then what"s her opinion about it?

单选题These animals migrate south annually in search of food.

单选题The Group of Seven, a clique of Canadian artists painting at the turn of the century, has been credited with arousing a widespread awareness of Canada"s rugged landscape.

单选题Why So Risky in Chemical Factories Which is safer—staying at home, traveling to work on public transport, or working in the office? Surprisingly, each of these carries the same risk, which is very low. However, what about flying compared to working in the chemical industry? Unfortunately, the former is 65 times riskier than the latter! In fact, the accident rate of workers in the chemical industry is less than that of almost any of human activity, and almost as safe as staying at home. The trouble with the chemical industry is that when things go wrong they often cause death to those living nearby. It is this which makes chemical accidents so newsworthy. Fortunately, they are extremely rare. The most famous ones happened at Texas City ( 1947), Flixborough (1974), Seveso (1976), Pemex (1984) and Bhopal (1984). Some of these are always in the minds of the people even though the loss of life was small. No one died at Seveso, and only 28 workers at Flixborough. The worst accident of all was Bhopal, where up to 3,000 were killed. The Texas City explosion of fertilizer killed 552. The Pemex fire at a storage plant for natural gas in the suburbs of Mexico City took 542 lives, just a month before the unfortunate event at Bhopal. Some experts have discussed these accidents and used each accident to illustrate a particular danger. Thus the Texas City explosion was caused by tons of ammonium nitrate (硝酸铵) ,which is safe unless stored in great quantity. The Flixborough fireball was the fault of management, which took risks to keep production going during essential repairs. The Seveso accident shows what happens if the local authorities lack knowledge of the danger on their doorstep. When the poisonous gas drifted over the town, local leaders were incapable of taking effective action. The Pemex fire was made worse by an overloaded site in an overcrowded suburb. The fire set off a chain reaction of exploding storage tanks. Yet, by a miracle, the two largest tanks did not explode. Had these caught fire, then 3,000 strong rescue team and fire fighters would all have died.

单选题We"re happy to collaborate with you in the project.

单选题Sugar is not an important element in bread, but flour is essential .

单选题Dumped waste might {{U}}contaminate{{/U}} water supplies. A. destroy B. decrease C. pollute D. delay

单选题Contact your doctor if the cough persists .

单选题 High Blood Pressure There is evidence that the usual variety of high blood pressure is, in part, a familial disease. Since families have similar genes as well as similar environment, familial diseases could be due to shared genetic influences, to shared environmental factors, or to both. For some years, the role of one environmental factor commonly shared by families, namely dietary salt, has been studied at Brook-haven National Laboratory. These studies suggest that chronic excess salt ingestion (摄政) can lead to high blood pressure in man and animals. Some individuals, however, and some rats consume large amounts of salt without developing high blood pressure. No matter how strictly all environmental factors were controlled in these experiments, some salt-fed animals never develop hypertension (高血压) whereas a few rapidly developed very severe hypertensions followed by early death. These marked variations were interpreted to result from differences in genetic constitution. By mating in successive generations only those animals that failed to develop hypertension from salt ingestion, a resistant strain (the R strain) has been evolved in which consumption of large quantities of salt fails to influence the blood pressure significantly. In contrast, by mating only animals that quickly develop hypertension from salt, a sensitive strain (the S strain) has also been developed. The availability of these two strains permits investigations not therefore possible. They provide a plausible laboratory model On which to investigate some clinical aspects of the human developing methods by which genetic susceptibility (敏感性) of human beings to high blood pressure can be defined without waiting for its appearance.

单选题The Ideal Husband Science now might be able to explain women's fascination with Brad Pitt's face and George Clooney's eyes. Women seem to (51) potential mate by how masculine (男性的) their features are, new research shows. Men with square jaws and well-defined brow ridges are seen as good short-term partners, (52) those with more feminine (女性的) traits such as a rounder face and fuller lips are perceived as better long-term mates. In the study by Daniel Kruger at the US's University of Michigan, 854 subjects viewed a series of (53) head shots that had been digitally changed to exaggerate or minimize masculine traits. They then (54) questions about how they expected the men in the photos to behave. Most participants said that those with more masculine features were (55) to be risky, competitive, and more apt to fight, challenge bosses, cheat on spouses and put less effort into parenting. Those with more feminine (56) were seen as good parents and husbands, hard workers and emotionally supportive mates. But, despite all the negative characteristics, when asked who they would choose for a short-term relationship, women selected the more masculine (57) men. Brad and George, both chiseled (轮廓清晰的) jaws and well-defined brows, then would be good for a (58) romance, not for something longer. The study was published in the December issue of the US journal Personal Relationships. Kruger said that from an evolutionary perspective, this (59) sense. The key is testosterone (睾丸激素) , the hormone responsible (60) the development of masculine facial features and other sexual characteristics. It has been found to affect the body's ability to fight disease: men with high levels of the hormone are typically (61) and healthy--traits women want to pass on to their children. However, increased testosterone has also been linked to (62) and violence in relationships. So, these men (63) produce high quality offspring, but they don't always make great parents or faithful mates, Kruger says. The scientific community have (64) skepticism toward physiognomy (观相术) , which links facial characteristics to certain behavioral traits. But Kruger argues that the research is a valuable tool for understanding mating strategies. And, of course, for explaining why Tony Leung and Takeshi Kanesshiro have millions of female (65) . It might have to do with their genes. Or something to do with ours.

单选题The steadily rising cost of labor on the waterfront has greatly increased the cost of shipping cargo by water.

单选题Child Consultants These days, "what do you want to do when you grow up?" is the wrong question to ask children in the USA. The (1) should be: "what job are you doing now?" American companies are employing more and more young people as consultants to evaluate products for child (2) . The 12-to-19 (3) group spends more than $100 billion a year in the USA. Specialist agencies have been created to help manufacturers ask kids about all the latest trends in clothes, food and (4) markets. One (5) , Teenage Research Unlimited, has panels (评判小组) of teenagers who give their verdict (裁决) on products (6) jeans (牛仔裤). Another company, Doyle Research Associated, holds two-hour sessions in a room (7) the "imaginarium (想象室)." Children are encouraged to play games to get (8) a creative mood. They have to write down any ideas that (9) into their heads. Some manufacturers prefer to do their own (10) research. The software company Microsoft runs a weekly " Kid's Council" at its headquarters in Seattle, (11) a panel of school children give their verdict on the (12) products and suggest new ones. One 11-year-old, Andrew Cooledge, told them that they should make more computer games which would appeal equally (13) boys and girls. Payments for the work are increasingly attractive. Andrew Cooledge was paid $250 and given some software. (14) , even if their ideas are valuable, the children will never make a fortune. They cannot have the copyright to their ideas. These are not jobs they can hold for long. (15) their mid-teens they can be told that they are too old.

单选题A gentle breeze {{U}}appeared{{/U}} just when the heat of the sun became unbearable.

单选题New Foods and the New World In the last 500 years, nothing about people--not their clothes, ideas, or languages--has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree (可可树) by South American Indians. The Spanish introduced it to the rest of the world during the 1500"s. And although it was very expensive, it quickly became fashionable. In London, shops where chocolate drinks were served became important meeting places. Some still exist today. The potato is also from the New World. Around 1600, the Spanish brought it from Peru to Europe, where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the "Potato Famine (饥荒)" of 1845-1846, and thousands more were forced to leave their homeland and move to America. There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world"s largest grower of coffee, and coffee is an important crop in Colombia and other South American countries. But it is native to Ethiopia, a country in Africa. It was first made into a drink by Arabs during the 1400"s. According to an Arabic legend, coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush. He tried one and experienced the "wide-awake" feeling that one-third of the world"s population now starts the day with.

单选题These machines are not regulated ______ but are joindy controlled by a central computer system.A. inevitablyB. individuallyC. irrespectivelyD. irregularly

单选题 阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子做出判断。如果该句提供的是正确信息，请选A：如果该句提供的是错误信息，请选B；如果该句的信息文章中没有提及，请选C。 {{B}} Going Back to Its Birthplace{{/B}} No sporting event takes hold of the world's attention and imagination like the Olympic Games. The football World Cup fascinates fans in Europe and South America; baseball's World Series is required viewing in North America; and the World Table Tennis Championships attracts the most interest in Asia. But the Olympics belong to the whole world. Now, after travelling to 17 countries over 108 years, the summer Games are returning to Athens, the place where the first modern Olympics was held. Participation in the Games is looked on not only as an achievement, but also as an honour. The 16 days between August 13 and 29 will see a record 202 countries compete, up from Sydney's 199. Afghanistan is back, having been banned from Sydney because the Taliban government didn't let women do sports. There is also a place for newcomers East Timor and Kiribati. A total of 10,500 athletes will compete in 28 sports, watched by 5.3 million ticket-paying viewers as well as a television audience of 4 billion. Athens is to use its rich history and culture to make the Olympics as special as possible. The Games will open with cycling events which start in front of the Parthenon and Acropolis monuments. The final event will be a historic men's marathon following the original route run by Phidippides in 490 BC to bring news of victory over the Persians. The ancient stadium at Olympia, first used for the Games nearly three centuries ago, will stage the shot put competitions. And the Panathenian Stadium, where the first modern Olympics was held, is to host the archery (射箭) events. If the well-known ancient sites deliver a great sense of history to the Games, the 39 new venues add a modern touch to the city of Athens. The main Olympic stadium, with a giant glass and steel roof, is the landmark (标志) building of the Olympics. "We believe that we will organize a 'magical' Games," said Athens 2004 President Gianna Angelopoulos-Daskalaki. "Our history with the Olympic Games goes back nearly 3,000 years, and Athens 2004 could be the best ever."