单选题The U.S. government has planned to ____ updating public transport systems.

单选题Henry Manley's company was in deep trouble.

单选题World Crude Oil Production may Peak a Decade Earlier Than Some Predict In a finding that may speed efforts to conserve oil, scientists in Kuwait predict that world conventional crude oil production will peak in 2014. This prediction is almost a decade earlier than some other predictions. Their study is in ACS" Energy Fuels. Ibrahim Nashawi and colleagues point out that rapid growth in global oil consumption has sparked a growing interest in predicting "peak oil". "Peak oil" is the point where oil production reaches a maximum and then declines. Scientists have developed several models to forecast this point, and some put the date at 2020 or later. One of the most famous forecast models is called the Hubbert model. It assumes that global oil production will follow a bell shaped curve, a related concept is that of "Peak Oil". The term "Peak Oil" indicates the moment in which world wide production will peak, afterwards to start on irreversible decline. The Hubbert model accurately predicted that oil production would peak in the United States in 1970. The model has since gained in popularity and has been used to forecast oil production worldwide. However, recent studies show that the model is insufficient to account for more complex oil production cycles of some countries. Those cycles can be heavily influenced by technology changes, politics, and other factors, the scientists say. The new study describes development of a new version of the Hubbert model that provides a more realistic and accurate oil production forecast. Using the new model, the scientists evaluated the oil production trends of 47 major oil-producing countries, which supply most of the world"s conventional crude oil. They estimated that worldwide conventional crude oil production will peak in 2014, years earlier than anticipated. The scientists also showed that the world"s oil reserves are being reduced at a rate of 2.1 percent a year. The new model could help inform energy, which related decisions and public policy debate, they suggest.

单选题It will absorb a large amount of money to decorate the office.

单选题Every country represented in the Olympics has a National Olympic Committee that selects the athletes who compete in the games.A. choosesB. honorsC. supportsD. trains

单选题You should soon {{U}}regain{{/U}} your appetite. A. keep B. lose C. recover D. get

单选题Will Hillary Be the Next American President? Back in 1969, US President Richard Nixon confidently predicted: "In the next 50 years, we shall see a woman president, perhaps sooner than you think." Today, not too far off Nixon's deadline, America is looking at that possibility. Over the weekend, Hillary Rodham Clinton, wife of former president Bill Clinton, announced her run for 2008 presidency. US polls indicate that Americans feel comfortable with a female president. A New York Times survey found nearly all Americans saying they would vote for president if she were qualified. However, accepting the theoretical notion of a female leader is quite different from voting an actual woman. In fact, there is still widespread distrust of a woman in the top position. This is partly due to the biased thinking that women are weak on national security, though they might be strong on education and health care. This damages their prospects as a presidential contender. "There's still an inherent nervousness on the part of voters putting a woman in as the ultimate decision-maker. Control of the army and border security are sorts of traditionally male jobs," commented Amy Walter, an American campaign analyst. "That's where I think voters consciously or unconsciously have difficulties with women candidates." Women have held the top job in other major Western countries. In 1979, Britain elected Margaret Thatcher prime minister. Last year, Germany made Angela Merkel its first female chancellor. In the US, no woman has succeeded in being nominated as a presidential candidate. One woman did make the attempt: Elizabeth Dole. In 1999, she tried to get the Republican Party nomination. But Dole could only raise $5 million for her bid--compared with the $56 million George W. Bush raised. So Barriers lie ahead for Hillary if she wants to make history by becoming the first female US president. With the Iraqi war underway, she'll find it even harder. "I don't feel that our society is ready for a woman president. The enemy we face does not respect females the same way we have come to see them as equals. If we were not in this war, I would support a woman president," said Chris Dildy, a computer engineering student.

单选题Differences of Policemen Real policemen hardly recognize any resemblance between their lives and what they see on TV. The first difference is that a policeman's real life revolves round criminal law. He has to know exactly what actions are crimes and what evidence can be used to prove them in court. He has to know nearly as much law as a professional lawyer, and what is more, he has to apply it on his feet, in the dark and rain, running down a street after someone he wants to talk to. Little of his time is spent in chatting, he will spend most of his working life typing millions of words on thousands of forms about hundreds of sad, unimportant people who are guilty of stupid, petty crimes. Most television crime drama is about finding the criminal: as soon as he's arrested, the story is over. In real life, finding criminals is seldom much of a problem. Except in very serious cases like murders and terrorist attacks little effort is spent on searching. Having made an arrest, a detective really starts to work. He has to prove his case in court and to do that he often has to gather a lot of difference evidence. At third big difference between the drama detective and the real one is the unpleasant pressures: first, as members of a police force they always have to behave absolutely in accordance with the law; secondly, as expensive public servants they have to get results. They can hardly ever do both. Most of the time some of them have to break the rules in small ways. If the detective has to deceive the world, the world often deceives him. Hardly anyone he meets tells him the truth. And this separation the detective feels between himself and the rest of the world is deepened by the simple-mindedness—as he sees it—of citizens, social workers, doctors, law-makers, and judges, who, instead of eliminating crime punish the criminals less severely in the hope that this will make them reform. The result, detectives feel, is that ninetenths of their work is recatching people who should have stayed behind bars. This makes them rather cynical.

单选题This kind of animals are on the verge of extinction , because so many are being killed for their fur.______

单选题The dentist has decided to {{U}}extract{{/U}} her bad tooth. A. take out B. repair C. pull D. dig

单选题The world Islands are bigger than the Palm Jumeirah.

单选题An {{U}}authentic{{/U}} name is needed when you apply for a mailbox. A. real B. false C. free D. incredible

单选题Acknowledged as the main cause of hay fever the pollen of ragweed is very bothersome.

单选题American young people find the transition into adulthood easy to face.

单选题Mother Knows Best? Once while being prepped (准备) for a television interview, I was chatting with the host about stay-at-home fathers. I made the point that one reason we're seeing more stay-at-home dads may be that it's no longer a given (假定的事实) that a man makes more money than his wife. Many families now take earning power into account when deciding which parent will stay home. At that point, one of the male crew members commented, almost to himself but loud enough for my benefit, "It should be the better parent who stays home. " A lot of guys say things like that. Usually it's a code for, "My wife, (read: any woman) is the better parent. " I was a stay-at-home father for eight years, so this declaration made me bristle (激动). It implied that our family's choice could only have been correct if I was a "better" parent than my wife. I suppose an argument could have been made that when I began staying home my wife was the "better" parent: She had spent more time with Roy, could read him better and calm him more quickly. And given a choice, he'd have picked her over me. But as she was the more employable one. my wife went out to work and I looked after our son. Because of the increased time I spent with him, I soon knew Roy well, understood what he needed and could look after him more or less as well as my wife could. Actually, the experience helped me unlock one of the world's great secrets : Women are good at looking after children because they do it. It's not because of any innate (先天的) female aptitude (天资) or a mother's instinct, it's because they put in the time and attention required to become good at the job. Women obviously get a biological head start from giving birth and nursing, but over the long term experience is more important. When I got the experience myself, I was good, too. As good? I don't know. Who cares? Children are not made of glass. Other people are capable of looking after them besides Mum.

单选题The majority of people around here are decent people.

单选题Factors Influencing Marriage The common view in social science of love relationships is not that opposites attract each other but that like attracts like. People fall in love with others who share their interests and tastes and whose personalities are similar. Hill, Rubin, and Peplau found only slight support for this view. On a great many characteristics, couples were not alike. On others, couples were only somewhat alike. Couples did tend to be about the same age, to be equally good-looking, to have similar IQ scores, to be of the same religion , and to want the same number of children. But on each of these things, quite a few couples differed from one another. In fact, on only one question did most agree on. whether they were "in love". The early interviews failed to find that being alike was very important in bringing couples together. The follow-up interviews found that similarities were much more important in keeping couples together. Those who were together after two years were much more closely matched than couples who broke up, especially in terms of age, IQ, college plans, and looks. Thus, couples were much more likely to break up if one person was a lot smarter, better looking, or older. It is easy to imagine why these differences would matter. If one person is much smarter or more mature than the other, this could cause conflicts. If one person is much better looking, he or she will have more chances for other relationships. Yet other things that would seem as important turned out not to matter. Those who stayed together differed not at all from those who broke up in how alike they were on religion, sex role ideas, beliefs about sex, idealism, or the number of children they wanted. Surely, one might suppose that marked differences in sex role attitudes could cause friction or that religious differences might lead to breakups. But there was no evidence of this. In fact, conflict was not one of the main reasons people gave for breaking up. Most said they broke up because they got bored with the other person. Often this caused one of the pair to become interested in someone else, thus prompting (促进) the split (分裂). Perhaps surprisingly, the woman got involved with someone else far more often than the man. Also, women were much more likely to suggest a breakup than men, regardless of the grounds. However, people were more likely to remain friends after the breakup if the man asked for the split. This suggests that the male ego is more sensitive to rejection.

单选题Cost as a Factor in Supply In a purely competitive market, the supplier of goods and services has no control over the market price, because he produces too little to influence market conditions. With no difference between his products and the products (51) his competitors, he will sell nothing if he charges above the market price and he will sell all if he charges at or (52) the market price. However, in considering the price, he must take the (53) of production into consideration. There are times when he may be willing to sell below his cost. This might happen when prices tumble for (54) he believes will be a short time. However, no business person can (55) to lose money for a prolonged period. He must be constantly (56) of his costs in relation to the market price if he is to compete successfully and earn a profit. Many people have the impression that as production increases, costs per unit decrease. (57) mass production has made this true in certain industries and at certain levels of production, (58) logic and practical experiences have shown that costs per unit begin to rise beyond a certain level of production. Some economists (59) to this principle as the law of increasing costs. The reason costs rise as production goes up is (60) . However, it is easy to recognize that as production goes up, the need for additional factors of production will also grow, (61) competitive bidding in the marketplace for the factors of production. If a producer needs (62) skilled labor to produce more, and none of this labor is unemployed, the producer will have to get (63) from other sources. This can be done by (64) higher wages. Higher bidding would also apply to the other factors of production. We must also recognize that not all labor is equally productive, (65) not all land is equally fertile and not all ore (矿石) is equally rich in the mineral wanted.

单选题Reading the job ad, he wondered whether he was {{U}}eligible{{/U}} to apply for it. A. competitive B. diligent C. qualified D. equal

单选题 第三篇 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 (摄取) 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.