单选题In order to return to the good old days, the Mecedes will probably take the following measures except ______.

单选题In America alone, tipping is now a $16 billion-a-year industry. Consumers acting rationally ought not to pay more than they have to for a given service. So why do they? The conventional wisdom is that tips both reward the efforts of good service and reduce uncomfortable feelings of inequality. The better the service, the bigger the tip. A paper analyzing data from 2,547 groups dining at 20 different restaurants shows that the relationship between larger tips and better service was very weak. Customers who rated a meal as "excellent" still tipped anywhere between 8% and 37% of the meal price. Tipping is better explained by culture than by economics. In America, the custom has become established; it is regarded as part of the accepted cost of a service. In a New York restaurant, failing to tip at least 15% could well mean abuse from the waiter. Hairdressers can expect to get 15-20%, the man who delivers your groceries $2. In Europe, tipping is less common; in many restaurants, free tipping is being replaced by a standard service charge. In many Asian countries, tipping has never really caught on at all. How to account for these national differences? Look no further than psychology. According to Michael Lynn, the Cornell paper's co-author, countries in which people are more outgoing, sociable or neurotic (神经质的) tend to tip more. Tipping relieves anxiety about being served by strangers. "And," says Mr. Lynn, "in America, where people are outgoing and expressive, tipping is about social approval. If you tip badly, people think less of you. Tipping well is a chance to show off." Icelanders, by contrast, do not usually tip—a measure of their introversion (内向) and lack of neuroses, no doubt. While such explanations may be crude, the hard truth seems to be that tipping does not work. It does not benefit the customer. Nor, in the case of restaurants, does it actually encourage the waiter, or help the restaurant manager to monitor and assess his staff. The cry of mean tippers that service people should "just be paid a decent wage" may actually make economic sense.

单选题The ________situation of the economy of Southeastern Asia is encouraging.

单选题Which of the following statements is supported by some scientists?

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单选题A suitable title for this passage would be ______.

单选题The most exciting kind of education is also the most personal. Nothing can exceed the joy of discovering for yourself something that is important to you! It may be an idea or a bit of information you come across accidentally -- or a sudden insight, fitting together pieces of information or working through a problem. Such personal encounters are the "payoff" in education. A teacher may direct you to learning and even encourage you in it -- but no teacher can make the excitement or the joy happen. That's up to you. A research paper, assigned in a course and perhaps checked at various stages by an instructor, leads you beyond classrooms, beyond the texts for classes and into a process where the joy of discovery and learning can come to you many times. Preparing the research paper is an active and individual process, and ideal learning process. It provides a structure within which you can make exciting discoveries of knowledge and of self, which are basic to education. But the research paper also gives you a chance to individualize a school assignment, to suit a piece of work to your own interests and abilities, to show others what you can do. Writing a research paper is more than just a classroom exercise. It is an experience in searching out, understanding and composing, which forms the basis of many skills applicable to both academic and nonacademic tasks. It is, in the fullest sense, a discovering, an education. So, to produce a good research paper is both a useful and a thoroughly satisfying experience! To some, the thought of having to write an assigned number of pages, often more than ever produced before, is disconcerting. To others, the very idea of having to work independently is threatening. But these is no need to approach the research paper assignment with anxiety, and nobody should view the research paper as an obstacle to overcome. Instead, consider it a goal to accomplish, a goal within reach if you use the help this book can give you.

单选题Although we are not sure why we sleep, there is no doubt ______ we need to do so.

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单选题From the passage we may say that ______.

单选题 {{B}}Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.{{/B}}