单选题The Americans and the British not only speak the same language but also ______ a large number of social customs. A. join B. take C. share D. have

单选题The freshmen______the new college life soon except Tom.

单选题It is suggested that the regular meeting on Wednesdays ______ limited to 20 minutes.

单选题What are those of us who have chosen careers in science and engineering able to do about our current problems? First, we can help destroy the false impression that science and engineering have caused the current world trouble. On the contrary, science and engineering have made vast contributions to better living for more people. Second, we can identify the many areas in which science and technology, more considerably used, can be of great service in the future than in the past to improve the quality of life. While we can make many speeches, and pass many laws, the quality of our environment will be improved only through better knowledge and better application of that knowledge. Third, we can recognize that much of the dissatisfaction we suffer today results from our very successes of former years. We have been so greatly successful in attaining material goals that we are deeply dissatisfied that we cannot attain other goals more rapidly. We have achieved a better life for most people, but we are unhappy that we have not spread it to all people. We have reduced many sources of environmental disasters, but we are unhappy that we have not conquered all of them. It is our raised expectations rather than our failures which now cause our distress. Granted that many of our current problems must be cured more by social, political, and economic instruments than science and technology, yet science and technology must still be the tools to make further advances in such things as clean air, clean water, better transportation, better medical care, more adequate welfare programs, purer food, conservation resources, and many other areas.

单选题When the baby was first sent to the hospital in London, her illness was considered to be ______.

单选题The advertisement for Super Suds detergent ______ that the sale has increased by 25% in the first quarter of the year. A. have been so successful B. had been so successful C. has been so successful D. will be so successful

单选题The picture illustrates the {{U}}compassion{{/U}} the artist has for his native land.

单选题He did very well, but he failed ______ the record.

单选题You should make (the other) fellow (to feel important), if you want to get along with him and have him (like) you, because that is (the way to do it).

单选题What is in the drug that makes you sick or dead? 1 , cocaine is harmful, but what makes it harmful? I can"t tell you about drugs, but I can help you think about them in this simple way. Your body is a very 2 machine, really a lot of chemical machinery, all of which 3 so that it all works together. Special 4 , which we call drugs, can affect it or 5 it in many different ways. Some drugs are 6 when your body has a problem, 7 disease-causing bacteria. Then someone may give you aspirin to keep your temperature from going too 8 or some penicillin because it stops the growth of some kinds of bacteria. 9 , all drugs are really poison, 10 if you take too much, so you must always use them carefully. Why do some people take drugs like cocaine? For a little while they seem to make you feel 11 , or smarter, or happier. But after their effects have worn 12 , your body has to pay an extra 13 to get back to 14 . That makes you want to get some more of the drug. So we say they are addictive. Drugs like cocaine have their special effects 15 they act as special poisons for your nervous system. They disconnect some of your nerve pathways and take 16 some of your senses and your worries. They make you want always more. And just a little 17 much can even block nerves to your heart and stop its beating. Many of us worry about the environment around us and what pollution does to 18 How about your internal environment, and what 19 inside you? You control that all by yourself in what you put into your 20 . Most drugs are pollutants. You would not want pollutants in the air and water around you. Why would you want pollutants in your body?

单选题Eggs, though good to health, have ______ of fat content. A. large number B. a large number C. a high number D. a high amount

单选题The greatest risk for rickets is in______ breastfed infants who are not supplemented with 400 IU of Vitamin D a day.

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单选题The explorers' hopes of finding their missing colleagues are now beginning to______.

单选题The new______of knowledge has created ______people: everyone believes that his or her subject cannot and possibly should not be understood by others.

单选题It seems to me that the Americans are a highly ______ people. Most of them like to travel whenever they get the chance. A. civilized B. luxury C. ambitious D. mobile

单选题By education, I mean the influence of the environment upon the individual to produce a permanent change in the habits of behavior, of thought and of attitude. It is in being thus susceptible to the environment that man differs from the animals, and the higher animals from the lower. The lower animals are influenced by the environment but not in the direction of changing their habits. Their instinctive responses are few and fixed by heredity. When transferred to an unnatural situation, such an animal is led astray by its instincts. Thus the "ant-lion" whose instinct implies it to bore into loose sand by pushing backwards with abdomen, goes backwards on a plate of glass as soon as danger threatens, and endeavors, with the utmost exertions to bore into it. It knows no other mode of flight, "or if such a lonely animal is engaged upon a chain of actions and is interrupted, it either goes on vainly with the remaining actions(as useless as cultivating an unsown field)or dies in helpless inactivity". Thus a net-making spider which digs a burrow and rims it with a bastion of gravel and bits of wood, when removed from a half finished home, will not begin again, though it will continue another burrow, even one made with a pencil. Advance in the scale of evolution along such lines as these could only be made by the emergence of creatures with more and more complicated instincts. Such beings we know in the ants and spiders. But another line of advance was destined to open out a much more far-reaching possibility of which we do not see the end perhaps even in man. Habits, instead of being born ready-made(when they are called instincts and not habits at all), were left more and more to the formative influence of the environment, of which the most important factor was the parent who now cared for the young animal during a period of infancy in which vaguer instincts than those of the insects were molded to suit surroundings which might be considerably changed without harm. This means, one might at first imagine, that gradually heredity becomes less and environment more important. But this is hardly the truth and certainly not the whole truth. For although fixed automatic responses like those of the insect-like creatures are no longer inherited, although selection for purification of that sort is no longer going on, yet selection for educability is very definitely still of importance. The ability to acquire habits can be conceivably inherited just as much as can definite responses to narrow situations. Besides, since a mechanism—is now, for the first time, created by which the individual(in contradiction to the species)can be fitted to the environment, the latter becomes, in another sense, less not more important. And finally, less not the higher animals who possess the power of changing their environment by engineering feats and the like, a power possessed to some extent even by the beaver, and preeminently by man. Environment and heredity are in no case exclusive but always-supplementary factors.

单选题The rise of multinational corporations, global marketing, new communications technologies, and shrinking cultural differences have led to an unparalleled increase in global public relations or PR. Surprisingly, since modern PR was largely an American invention, the U.S. leadership in public relations is being threatened by PR efforts in other countries. Ten years ago, for example, the world"s top five public relations agencies were American-owned. In 1991, only one was. The British in particular are becoming more sophisticated and creative. A recent survey found that more than half of all British companies include PR as part of their corporate planning activities, compared to about one-third of U.S. companies. It may not be long before London replaces New York as the capital of PR. Why is America lagging behind in the global PR race? Firstly, Americans as a whole tend to be fairly provincial and take more of an interest in local affairs. Knowledge of world geography, for example, has never been strong in this country. Secondly, American lags behind their European and Asian counterparts in knowing a second language. Less than 5 percent of Burson-Marshall"s U. S. employees know two languages. Ogilvy and Mather has about the same percentage. Conversely, some European firms have half or more of their employees fluent in a second language. Finally, people involved in PR abroad tend to keep a closer eye on international affairs. In the financial PR area, for instance, most Americans read the Wall Street Journal . Overseas, their counterparts read the Journal as well as the Financial Times of London and The Economist , publications not often read in this country. Perhaps the PR industry might take a lesson from Ted Turner of CNN (Cable News Network). Turner recently announced that the word "foreign" would no longer be used on CNN news broadcasts. According to Turner, global communications have made the nations of the world so interdependent that there is no longer any such thing as foreign.