单选题American culture has not been immune to cultural influences from outside. The idea of democracy came from the ancient Greeks; the Industrial Revolution started in England; jazz and rock music preserve African rhythms—to pick a few examples. Indeed, many of the things we think of as "100 percent American" came from other cultures. Still, most of the changes in American culture over the last century have come from within, as the result of inventions and discoveries. And change has been dramatic. One hundred years ago the United States was largely a nation of farmers. Many of the things we take for granted today—a high school education, for example, or indoor plumbing—were luxuries then. The moon was a light for lovers, not a site for scientific exploration; genetic engineering (基因工程) was not even a subject for science fiction, much less for laboratory research and corporate investments. The decades following the Second World War, in particular, were characterized by spectacular scientific and technological advances, national self-confidence, optimism, and (for many Americans) prosperity. The American economy was the strongest in the world: more goods were produced and sold, more people were working, and the standard of living was higher than ever before. Polls (民意调查) taken in the 1950's and 1960's show that the average American was preoccupied with the questions "will I make a good living?" "Will I be successful?" and "Will I raise successful, happy children?" Success was defined in terms of maintaining a stable family and "keeping up with the Jones". Most Americans believed that if they played by the rules—if they work hard and did what was expected, if they sacrificed their own needs to those of their family and their employer—they would be rewarded with an ever-increasing standard of living, a devoted spouse, and decent children. An expensive car, a suburban home, and children in college were tangible (可触知的) signs that hard work and self-sacrifice paid off.

单选题Man: Will this take very long? I have to get back to work in an hour. Woman: Well, you need to have your teeth cleaned and a cavity filled. Question: Where does this conversation probably take place?

单选题Helicopters work with the aid of ______

单选题(In) warm-blooded animals, their body temperature, regardless of the temperature of the animals' (surroundings), (are) maintained within narrow (limits).A. InB. surroundingsC. areD. limits

单选题A: How about coming over for dinner tonight?B: ______

单选题A: I've been on business trip abroad last month.B: ______A: Oh, pretty good, thanks. What about you?B: Just can't complain.

单选题Imagine a world in which there was suddenly no emotion--a world in which human beings could feel no love or happiness, no terror or hate. Try to imagine the consequences of such a transformation. People might not be able to stay alive: knowing neither joy nor pleasure, anxiety nor fear, they would be as likely to repeat acts that hurt them as acts that were beneficial. They could not learn: they could not benefit from experience because this emotional world would lack rewards and punishments. Society would soon disappear: people would be as likely to harm one another as to provide help and support. Human relationships would not exist: in a World without' friends or enemies, there could be no marriage, affection among companions, or bonds among members of groups. Society's economic underpinnings (支柱) would be destroyed: since earning $10 million would be no more pleasant than earning ＄10, there would be no incentive to work. In fact, there would be no incentives of any kind. For as we will see, incentives imply a capacity to enjoy them. In such a world, the chances that the human species would survive are next to zero, because emotions are the basic instrument of our survival and adaptation. Emotions structure the world for us in implant ( 嵌入, 插入)ways. As individuals, we categorize objects on the basis of our emotions. True, we consider the length, shape, size, or texture, but an object's physical aspects are less important than what it has done or can do to us--hurt us, surprise us, anger us or make us joyful. We also use categorizations colored by emotions in our families, communities, and overall society. Out of our emotional experiences with objects and events comes a social feeling of agreement that certain things and actions are "good" and others are "bad", and we apply these categories to every aspect of our social life--from what foods we eat and what clothes we wear to how we keep promises and which people our group will accept. In fact, society exploits our emotional reactions and attitudes, such as loyalty, morality, pride, shame, guilt, fear and greed, in order to maintain itself. It gives high rewards to individuals who perform important tasks such as surgery, makes heroes out of individuals for unusual or dangerous achievements such as flying fighter planes in a war, and uses the legal and penal (刑法的) system to make people afraid to engage in antisocial acts.

单选题A: Excuse me, Mr. Smith, but are you free this evening? B: ______

单选题The chairman was impressed by the consensus of their opinion, based on reports from various medi

单选题The scientists, (concerned about) the potential hazards, demanded (the latest) research finding (made) (publicly).

单选题Man: Would you like to try on that dress, Madam? Woman. Thank you, but I don't think the pink color goes very well with my shoes. Question: What will the woman do next?

单选题Woman: Don't you talk down to me, Frank! Whether you like it or not, I know just as much about the subject as you do, if not more.Man: But, Nancy, I really think my experience has been much more relevant.Question: What does the woman object toy

单选题A: ______ B: While I'm at summer school in Dallas, you can write me at my brother's address.

单选题The representative of the committee was asked to verify his earlier statement.

单选题The government has, for the most part, done a poor job of spurring business to come up with breakthroughs.

单选题A: Excuse me. Could you show me the way to the nearest subway station?B: ______

单选题A: Look at the mess. And the inspector will be here any minute. B: ______.

单选题Some of these studies (have shown) that although some people have trouble (to fall asleep), others have an (equally) difficult time (waking up).A. have shownB. to fall asleepC. equallyD. waking up

单选题Many people ______ the defense of their country.

单选题Woman: You seem to pride yourself on having a lot of friends. Man: That's for sure. Everyone would be proud of having many friends. Woman: But it's a pity that most of them are fair-weather friends. Man: What does that matter? Isn't that we need all kinds of friends? Question: What do we know about the man's friends?