单选题下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案。 {{B}}第一篇{{/B}} It is hard to predict how science is going to turn out, and if it is really good science it is impossible to predict. If the things to be found are actually new, they are by definition unknown in advance. You cannot make choices in this matter. You either have science or you don't, and if you have it you are obliged to accept the surprising and disturbing pieces of information, along with the neat and promptly useful hits, The only solid piece of scientific truth abut which I feel totally confident is that we are profoundly ignorant about nature. Indeed, I regard this as the major discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. It would have amazed the brightest minds of the 18th. century Enlightenment to be told by any of us how little we know and how bewildering seems the way ahead. It is this sudden confrontation with the depth and scope of ignorance that represents the most significant contribution of the 20th century science to the human intellect. In earlier times, we either pretended to understand how things worked or ignored the problem, or simply made up stories to fill the gaps. Now that we have begun exploring in earnest, we are getting glimpses of how huge the questions are, and how far from being answered. Because of this, we are depressed. It is not so bad being ignorant if you are totally ignorant; the hard thing is knowing in some detail the reality of ignorance, the worst spots and here and there the not-so-bad spots, but no true light at the end of the tunnel nor even any tunnels that can yet be trusted. But we are making a beginning, and there ought to be some satisfaction. There are probably no questions we can think up that can' t be answered, sooner or later, including even the matter of consciousness. To be sure, there may well be questions we can't think up and therefore limits to the reach of human intellect, but that is another matter. Within our limits, we should be able to work our way through to all our answers, if we keep at it long enough, and pay attention.

单选题Nowadays, a lot of young youngsters are still depended ______ their parents, even after they have grown up.A. toB. withC. onD. over

单选题The development of the transistor and integrated circuits revolutionized the electronics industry by allowing components to be packaged more {{U}}densely{{/U}}.

单选题He demolished my argument in minutes.

单选题She can speak French and German, let alone English.

单选题The most prominent characteristic of handwriting is undoubtedly letter formation and slant.A. presumablyB. in many casesC. surelyD. without bias

单选题Almost Human? Scientists are racing to build the world's first thinking robot .This is not science fiction：some say they will have made it by the year 2020.Carol Packer repots． Machines that walk，speak and feel are no longer science fiction．Kismet is the name of an android(机器人)which scientists have built at the Massachusetts Institute of Technology(MIT)． Kismet is different from the tradition。al robot because it can show human emotions．Its eyes．ears and lips move to show when it feels happy．sad or bored．Kismet is one of the first of a new generation of androids—robots that 100k like human beings—which can imitate human feelings．Cog，another android invented by the MIT, imitates the action of a mother Howere, scientists admit that so far Cog has the mental ability of a two．year．old． The optimists(乐观主义者)say that by the year 2020 we will have created humanoids(机 器人)with brains similar to those of an adult human being．These robots will be designed to look like people to make them more attractive and easier to sell to the public．What kind of jobs will they do? In the future，robots like Robonaut ，a humanoid invented by NASA，will be doing dangerous jobs，like repairing space stations They will also be doing more and more of the household work for US．In Japan，scientists are designing androids that will entertain US by dancing and playing the piano． Some people worry about what the future holds：will robots become monsters(怪物)?Will people themselves become increasingly like robots? Experts predict that more and more people will be wearing micro-computers，connected to the Internet，in the future．People will have micro-chips in various parts of their body，which will connect them to a wide variety of gadgets (小装置)．Perhaps we should not exaggerate(夸大)the importance of technology，but one wonders whether , in years to come，we will still be falling in love，and whether we will still feel pain．Who knows?

单选题It is very late; {{U}}hence{{/U}} you must go to bed.

单选题The manager got angry just because his secretary was ten minutes late.

单选题 How to Dress Properly Being less than perfectly well-dressed in a business setting can result in a feeling of profound discomfort that may well require therapy to dispel. And the sad truth is that "clothing mismatches" on the job can ruin the day of the person who is wearing the inappropriate attire(着装), and the people with whom he or she comes in contact. Offices vary when it comes to dress codes. Some businesses have very high standards for their employees and set strict guidelines for office attire, while others maintain a more relaxed attitude. However, it is always important to remember that no matter what your company's attitude is regarding what you wear, you are working in a business environment and you should dress accordingly. Certain items may be more appropriate for evening wear than for a business meeting, just as shorts and a T-shirt are better suited for the beach than for an office environment, our attire should reflect both your environment and your position. A senior vice president has a different image to maintain than that of a secretary or sales assistant. Like it or not, you will be judged by your personal appearance. This is never more apparent than on "dress-down days", when what you wear can say more about you than any business suit ever could. In fact, people will pay more attention to what you wear on dress-down days than on "business professional" days. Thus, when dressing in "business casual" clothes, try to put some flair into your wardrobe choices, recognizing that the "real" definition of business casual is to dress just one notch(等级)down from what you would normally wear on business-professional attire days. Remember, there are boundaries between your career and your social life. You should dress one way for play and another way when you mean business. Always ask yourself where you ale going and how other people will be dressed when you get there. Is the final destination the opera, the beach, or the office? Dress accordingly and you will discover the truth in the axiom(公理)that clothes make the man and the woman. When in doubt, always err on the side of dressing slightly more conservatively than the situation demands.

单选题He was Udeceived/U by her soft words.

单选题 The Eye's Adaptation to Color As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile changeable thing depending to a large extent on the relationship of the color to other colors seen simultaneously. It is not fixed in its relation to the direct stimulus which creates it. On the other hand, the properties of surfaces that give rise to color do not seem to change greatly under a wide variety of illumination colors, usually (but not always) looking much the same in artificial light as in daylight. Both of these effects seem to be due in large part to the mechanism of color adaptation mentioned earlier. When the eye is fixed on a colored area, there is an immediate readjustment of the sensitivity of the eye to color in and around the area viewed. This readjustment does not immediately affect the color seen but usually does affect the next area to which the gaze is shifted. The longer the time of viewing, the higher the intensity, and the larger the area, the greater the effect will be in terms of its persistence in the succeeding viewing situation. As indicated by the work of Wright and Schouten, it appears that, at least for a first approximation, full adaptation takes place over, a very brief time if the adapting source is moderately bright and the eye has been in relative darkness just previously. As the stimulus is allowed to act, however, the effect becomes more persistent in the sense that it takes the eye longer to regain its sensitivity to lower intensities. The next result is that, if the eye is so exposed and then the gaze is transferred to an area of lower intensities, the loss of sensitivity produced by the first area will still be present and appear as an "afterimage" superimposed on the second. The effect not only is present over the actual area causing the "local adaptation" but also spreads with decreasing strength to adjoining areas of the eye to produce "lateral adaptation". Also, because of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become uniform over the whole eye.

单选题3. Will Anyone Watch 3-D TV? Mark the calendar: 2010 might be the year that TV's final frontier gets broken. Announced in early September, the newest models in the offing (马上就来临的) for late 2010 from Sony and Panasonic are bringing 3-D HDTV (高消晰度电视) into the home. That is, if you're willing to wear the glasses. Yes, glasses. They're not quite the flimsy red-and-blue-cellophane (玻璃纸) getups that they used to be, but the Sony and Panasonic models still require you to wear a pair of shades to observe the effect. How can TV manufacturers convince you that seeing shows in 3-D is worth the annoyance of having to wear a pair of specs (眼镜)? The first way is by making the technology way better. After all. 3-D entertainment is nothing new. The early 1950s were flooded with 3-D movies, and the technology has made an occasional comeback ever since. Each time, though, it's done in by the same complaints: poor image quality and headaches and eyestrain from extended viewing. Early reviews of the new models from Sony and Panasonic suggest they've solved the problem. Both use glasses that contain tiny shutters (快门), opening and closing at 120 frames per second, in sync with (与……同步)the image on the screen to give the illusion of depth. It's a new approach that gives users a wider viewing angle, another weakness of older approaches. All this would be pointless if the entertainment industry weren't also taking a new look at 3-D, The recent spate (一阵) of 3-D movies on the big screen-G-Force, Monsters vs Aliens and My Bloody Valentine all had 3-D debuts this year-foreshadows (预示) a similar spurt on the small screen. Blu-ray discs, which have the storage capacity necessary for high-definition 3-D content, and their players are becoming more affordable, and Panasonic is working with movie studios to release 3-D editions of movies, timed to coincide with the first group of TVs. Broadcast networks are paying close attention too-ESPN broadcast the Sept. 12 USC vs. Ohio State college-football game in 3-D as a pilot test. and in Britain there are already stations dedicated to 3-D content. But still. The glasses! The headgear(盔)necessary to watch modem 3-D TVs remains bulky-and, well, ugly-but Luxottica, maker of Ray-Ban, is working on a solution tot that. The company plans to release 3-D glasses modeled after Ray-Ban's classic Wayfarer (徙步旅行者) shades. giring even the style-conscious enthusiast little reason to resist 3-D.

单选题She longed for a chance to speak to Tom in private.

单选题Nightingale played a great role in

单选题As he is going to work in Holland for two years, he will be parted from his two children. A. stayed B. separated C. far D. worked

单选题Many of their ideas are being incorporated into orthodox medical treatment. A. acceptable B. conservative C. western D. conventional

单选题The sisters can't tolerate each other. A. bear B. hate C. like D. criticize

单选题Powering a City? It"s a Breeze. The graceful wooden windmills that have broken up the flat Dutch landscape for centuries—a national symbol like wooden shoes and tulips—yielded long ago to ungainly metal-pole turbines. Now, windmills are breaking into a new frontier. Though still in its teething stages, the "urban turbine" is a high-tech windmill designed to generate energy from the rooftops of busy cities. Lighter, quieter, and often more efficient than rural counterparts, they take advantage of the extreme turbulence and rapid shifts in direction that characterize urban wind patterns. Prototypes have been successfully tested in several Dutch cities, and the city government in the Hague has recently agreed to begin a large-scale deployment in 2003. Current models cost US $8,000 to US $12,000 and can generate between 3,000 and 7,000 kilowatt hours of electricity per year. A typical Dutch household uses 3,500 kilowatt hours per year, while in the United States, this figure jumps to around 10,000 kilowatt hours. But so far, they are being designed more for public or commercial buildings than for private homes. The smallest of the current models weigh roughly 200 kilograms and can be installed on a roof in a few hours without using a crane. Germany, Finland and Denmark have also been experimenting with the technology, but the ever-practical Dutch are natural pioneers in urban wind power mainly because of the lack of space. The Netherlands, with 16 million people crowded into a country twice the size of Slovenia, is the most densely populated in Europe. Problems remain, however, for example, public safety concerns, and so strict standards should be applied to any potential manufacturer. Vibrations are the main problem in skyscraper-high turbine. People don"t know what it would be like to work there, in an office next to one of the big turbines. It might be too hectic. Meanwhile, projects are under way to use minimills to generate power for lifeboats, streetlights, and portable generators. "I think the thing about wind power is that you can use it in a whole range of situations," said Corin Millais, of the European Wind Energy Association. "It"s a very local technology, and you can use it right in your backyard, but I don"t think anybody wants a nuclear power plant in their backyard."