单选题(2010) The harder we try,____it is for us to overcome the difficulties and succeed.

单选题{{B}}Passage Five{{/B}} Standard usage include those words and expressions understood, used, and accepted by a majority of the speakers of a language in any situation regardless of the level of formality. As such, these words and expressions are well defined and listed in standard dictionaries. Colloquialisms, on the other hand, are familiar words and idioms that are understood by almost all speakers of language and used in informal speech or writing, but not considered acceptable for more formal situations. Almost all idiomatic expressions are colloquial language. Slang, however, refers to words and expressions understood by a large number of speakers but not accepted as appropriate formal usage by the majority. Colloquial expressions and even slang may be found in standard dictionaries but will be so identified. Both colloquial usage and slang are more common in speech than in writing. Colloquial speech often passes into standard speech. Some slang also passes into standard speech, but other slang expressions enjoy momentary popularity followed by obscurity. In some cases, the majority never accepts certain slang phrases but nevertheless retains them in their collective memories. Every generation seems to require its own set of words to describe familiar objects and events. It has been pointed out by a number of linguists that three cultural conditions are necessary for the creation of a large body of slang expressions. First, the introduction and acceptance of new objects and situations in the society; second, a diverse population with a large number of subgroups; third, association among the subgroups and the majority population. Finally, it is worth noting that the terms "standard", "colloquial," and "slang" exist only as abstract labels for scholars who study language. Only a tiny number of the speakers of any language will be aware that they are using colloquial or slang expressions. Most speakers of English will, during appropriate situations, select and use all three types of expressions.

单选题Cupta has estimated that Indian marriages based on love occur among less than one percent of the population because______

单选题The worlds first large electronic computer (1946) ______. A．was built after the World War Ⅱ B．was used for over 10 years C．contained 25000 valves D．could perform only 10000 calculations per second

单选题Only the gardener A is capable of endlessly reviving B so much hope that this year, C regardless of drought, flood, typhoon, or his own stupidity, this year D is going to do it right!

单选题Prince Charles, the longest-waiting ______to the throne in British history, has spoken of his 'impatience' to get things done.(2013年北京大学考博试题)

单选题Many disciplines of science are actually ______ rather than becoming farther apart.

单选题—Is Tom still smoking ? —No. By next Saturday he ______ for a whole month without smoking a single cigarette.A. will goB. will have goneC. will have beenD. has been going

单选题I don't trust the man; he's not______.

单选题A: Could you get me Extension 6459, please? B: ______. A. Hello? This is Tom Brown. B. Sure. Here you are. C. Sorry. The line is engaged. D. John Smith's office. What can I do for you?

单选题The rocks are carefully crushed ______ the diamonds are not destroyed.

单选题Teachers encourage the students to use dictionaries so that ______.

单选题Whenever a camera was pointed at her, Marilyn would instantly ______ herself into a radiant star. A. transport B. transfer C. transform D. transgress

单选题Cindy: Thanks for all your help. Joe: No problem. Have a good day. Cindy: ______ Thanks again. Bye. A. I will. B. You too. C. It will be. D. I think so.

单选题The color______from yellow through green to black.

单选题There is few evidence that children in language classrooms learn foreign languages any better than adults in similar classroom situations. A. B. C. D.

单选题Many of those who come from the countryside find it difficult to adapt to the rapid ______ of modern life.

单选题 When Thomas Keller, one of America's foremost chefs, announced that on Sept. 1 he would abolish the practice of tipping at Per Se, his luxury restaurant in New York City, and replace it with a European--style service charge, I knew three groups would be opposed: customers, servers and restaurant owners. These three groups are all committed to tipping—as they quickly made clear on Web sites. To oppose tipping, it seems, is to be anticapitalist, and maybe even a little French. But Mr. Keller is right to move away from tipping—and it's worth exploring why just about everyone else in the restaurant world is wrong to stick with the practice. Customers believe in tipping because they think it makes economic sense. "Waiters know that they won't get paid if they don't do a good job" is how most advocates of the system would put it. To be sure, this is a tempting, apparently rational statement about economic theory, but it appears to have little applicability to the real world of restaurants. Michael Lynn, an associate professor of consumer behavior and marketing at Cornell's School of Hotel Administration, has conducted dozens of studies of tipping and has concluded that consumers' assessments of the quality of service correlate weakly to the amount they tip. Rather, customers are likely to tip more in response to servers touching them lightly and leaning forward next to the table to make conversation than to how often their water glass is refilled—in other words, customers tip more when they like the server, not when the service is good. Mr. Lynn's studies also indicate that male customers increase their tips for female servers while female customers increase their tips for male servers. What's more, consumers seem to forget that the tip increases as the bill increases. Thus, the tipping system is an open invitation to what restaurant professionals call "upselling": every bottle of imported water, every espresso and every cocktail is extra money in the server's pocket. Aggressive upselling for tips is often rewarded while low-key, quality service often goes unrecognized. In addition, the practice of tip pooling, which is the norm in fine-dining restaurants and is becoming more common in every kind of restaurant above the level of a greasy spoon, has ruined whatever effect voting with your tip might have had on an individual waiter. In an unreasonable outcome, you are punishing the good waiters in the restaurant by not tipping the bad one. Indeed, there appears to be little connection between tipping and good service.

单选题This article shows that ______.