单选题{{B}}Passage Three{{/B}} People enjoy talking about "firsts." They like to remember their first love or their first car. But not all firsts are happy ones. Few people enjoy recalling the firsts that are bad. One of history's bad but important firsts was the first car accident. Autos were still young when it happened. The crash took place in New York City. The year was 1896. The month was May. A man from Massachusetts was visiting the city in his new car. At the time, bicycle riders were still trying to get used to the new set of wheels on the road. No one is sure who was at fault. In any case, the bike and the car collided. The man on the bike was injured. The driver of the car had to stay in jail and wait for the hospital report on the bicycle rider. Luckily, the rider was not killed. Three years later, another automobile first took place. The scene was again New York City, a real estate broker named Henry Bliss stepped off a streetcar. He was hit by a passing car. Once again, no one is sure just how it happened or whose fault it was. The driver of the car was put in jail. Poor Mr. Bliss became the first person to die in a car accident.

单选题Cars account for half the oil consumed in the U.S., about half the urban pollution and one fourth the greenhouse (温室) gases. They take a similar toll (损耗) of resources in other industrial nations and in the cities of the developing world. As vehicle use continues to increase in the coming decade, the U.S. and other countries will have to deal with these issues or else face unacceptable economic, health-related and political costs. It is unlikely that oil prices will remain at their current low level or that other nations will accept a large and growing U.S. contribution to global climatic change. Policymakers, and industry have four options: reduce vehicle use, increase the efficiency and reduce the emissions of conventional gasoline-powered vehicles, switch to less harmful fuels, or find less polluting driving systems. The last of these—in particular the introduction of vehicles powered by electricity—is ultimately the only sustainable option. The other alternatives are attractive in theory but in practice are either impractical or offer only marginal improvements. For example, reduced vehicle use could solve traffic problems and a host of social and environmental problems, but evidence from around the world suggests that it is very difficult to make people give up their cars to any significant extent. In the U.S., mass-transit ridership and carpooling (合伙用车) have declined since World War II. Even in western Europe, with fuel prices averaging more than $ 1 a liter (about $ 4 a gallon) and with easily accessible mass transit and dense populations, cars still account for 80 percent of all passenger travel. Improved energy efficiency is also appealing, but alternative fuel economy has barely made any progress in 10 years. Alternative fuels such as natural gas, burned in internal-combustion engines, could be introduced at relatively low cost, but they would lead to only marginal reductions in pollution and greenhouse emissions (especially because oil companies are already spending billions of dollars every year to develop less polluting types of gasoline). (337 words)

单选题In scientific inquiry, it becomes a matter of duty to expose a______hypothesis to every possible kind of examination.

单选题(84) Cancer is among the top killer diseases in our society today and scientists have found out that stress helps to bring it on. It is worthwhile to consider, therefore, what are the causes of stress in our life, and whether we can do anything about them. Are we under-employed, or overburdened with too many responsibilities? Do we have a right balance of work and leisure in our lives? Are our relationships with family, friends or fellow workers all they should be? All these things can be a cause of stress, and it is best to face them honestly, and to bring our frustrations into the open. People who have a good row and then forget it are doing their health more good than those who bottle up their feelings. (85) If our self-examination has brought any causes of stress to light, let us consider what we can do about them. It is possible to change jobs. We can make more leisure and fill it more happily, if we will accept a different living standard. We can improve our personal relationships by a different attitude. It is we who allow other people to make ourselves unhappy. Often the little things that disturb us are not worth an hour's anger. The teaching in the Bible "Let not the sun go down upon your wrath" is good advice from the health point of view as well as the religious.

单选题Education and experience in these areas may be necessary to train one competently to prescribe and monitor medications, and hence to decrease potential ______.

单选题Barbara: Your help means everything. Just don"t know how I"ll ever repay you. Kenneth: ______. It"s nothing!

单选题From the passage we know that ______. A．virus scanners can identify a virus even if they dont have a signature for it B．one of the weaknesses of the virus scanners is that they cant detect a known virus before it is executed C．self mutating viruses which infect a file in a different way each time, cant be identified by a simple pattern search and therefore make the scanners ineffective D．because virus scanners identify a virus by name, they can indicate only where on the hard driver infection has occurred

单选题As my fine professor of economics Lowell Harriss used to tell us, economics is the study of the allocation of scarce goods and services. What could be scarcer or more precious than love? It is rare, hard to come by and often fragile. My primary life study has been about love. Second comes economics, so here, in the form of a few rules, is a little amalgam (统一体) of the two fields: the economics of love. In general, and with rare exceptions, the returns in love situations are roughly proportional to the amount of time and devotion invested. The amount of love you get from an investment in love is correlated, if only roughly, to the amount of yourself you invest in the relationship. If you invest caring, patience and unselfishness, you get those things back. High-quality bonds consistently yield more return than junk, and so it is with high-quality love. As for the returns on bonds, I know that my comment will come as a surprise to people who have been brainwashed into thinking that junk bonds are free money. They aren"t. The data from bond research, W. Braddock Hickman, shows that junk debt outperforms high quality only in rare situations, because of the default risk. In love, the data is even clearer. Stay with high-quality human beings. And once you find that you are in a junk relationship, sell immediately. Junk situations can look appealing and seductive, but junk is junk. Be wary of it unless you control the market. In every long-term romantic situation, returns are greater when there is a monopoly. If you have to share your love with others, if you have to compete even after a brief while with others, forget the whole thing. You want to have monopoly bonds with your long-term lover. At least most situations work out better this way. The returns on your investment should at least equal the cost of the investment. If you are getting less back than you put in over a considerable period of time, back off. To coin a phrase: Fall in love in haste, repent at leisure.

单选题The lack of money and facilities depressed and ______ them a lot.

单选题The sentence "If only the rest of his expenses were as easy to quantify." (Lines 2-3, Paragraph 1) implies that ______.

单选题The Pacific island attracts shoals of tourists with its rich ______of folk arts.

单选题______ , we'll go out to have a picnic.

单选题It was reported yesterday that three teenagers had been______the bank robbery.

单选题We are sometimes __________ of selfishness in our lives, though we are mostly generous in personality.

单选题The slogan on the poster for Enduring Love indicates that

单选题The adjustment by retarding growth and arresting vital functions during winter may result in the leaf fall of middle latitude deciduous trees.