单选题The banknotes which had fooled many bank tellers were discovered to be ______. A. artificial B. genuine C. counterfeit D. faulty

单选题Keys should never be hidden around the house since thieves ______ know where to look. A. virtually B. initially C. invariably D. infinitely

单选题The Watergate incident is mentioned to show ______.

单选题The widowed old woman was so lonely that she would talk ______ to the strangers in the supermarkets about her pets.

单选题He was ______ only by his wish to help me, and expected nothing in return.

单选题Single mums are better at raising their kids than two parents—at least in the bird world. Mother zebra finches have to work harder and raise fewer chicks on their own, but they also produce more attractive sons who are more likely to get a mate. The finding shows that family conflict is as important an evolutionary driving force as ecological factors such as hunting and food supply. With two parents around, there's always a conflict of interests, which can have a detrimental effect on the quality of the offspring. In evolutionary terms, the best strategy for any parent in the animal world is to find someone else to care for their offspring, so they can concentrate on breeding again. So it's normal for parents to try to pass the buck to each other. But Ian Hartley from the University of Lancaster and his team wondered how families solve this conflict, and how the conflict itself affects the offspring. To find out, they measured how much effort zebra finch parents put into raising their babies. They compared single females with pairs, by monitoring the amount of food each parent collected, and removing or adding chicks so that each pair of birds was raising four chicks, and each single mum had two—supposedly the same amount of work. But single mums, they found, put in about 25 per cent more effort than females rearing with their mate. To avoid being exploited, mothers with a partner hold back from working too hard if the rather is being lazy, and it's the chicks that pay the price. "The offspring suffer some of the cost of this conflict," says Hartley. The cost does not show in any obvious decrease in size or weight, but in how attractive they arc to the opposite sex. When the chicks were mature, the researchers tested the "fitness" of the male offspring by offering females their choice of partner. Those males reared by single mums were chosen more often than those from two-parent families. Sexual conflict has long been thought to affect the quality of care given to offspring, says zoologist Rebecca Kilner at Cambridge University, who works on conflict of parents in birds. "But the experimental evidence is not great. The breakthrough here is showing it empirically." More surprising, says Kilner, is Hartley's statement that conflict may be a strong influence on the evolution of behaviour, clutch size and even appearance. "People have not really made that link," says Hartley. A female's reproductive strategy is usually thought to be affected by hunting and food supply. Kilner says conflict of parents should now be taken into account as well.

单选题With the development of sophisticate instruments, earthquake will become predictable.

单选题A transplant operation is successful only if doctors can prevent the body from rejecting the ______organ.

单选题I decided to get in touch with him ______ after I receive his letter.

单选题It is not unusual for chief executives to collect millions of dollars a year in pay, stock options, and bonuses. In the last fifteen years, while executive remuneration rose, taxes in the highest income bosses went down. Millionaires are now common-place. Amiability is not a prerequisite for rising to the top, and there are a number of chief executive officers with legendary bad tempers. It is not the boss' job to worry about the well-being of his subordinates although the man with many enemies will be swept out more quickly in hard times; it is the company he worries about. His business savvy is supposed to be based on intimate knowledge of his company and the industry so he goes home nightly with a full briefcase. At the very top--and on the way up--executives are exceedingly dedicated. The American executive must be capable of enough small talk to get him through the, social part of his schedule, but he is probably not a highly cultured individual or an intellectual. Although his wife may be on the board of the symphony or opera, he himself" has little time for such pursuits. His reading may largely concern business and management, despite interests in other fields. Golf provides him with a sportive outlet that combines with some useful socializing. These days, he probably attempts some form of aerobic exercise to "keep the old heart in shape" and for the same reason goes easy on butter and alcohol, and substances thought to contribute to taking highly stressed executives out of the running. But his doctor's admonition to "take it easy" falls on deaf" ears. He likes to work. He knows there are younger men nipping at his heels. Corporate head-hunting, carried on by "executive search firms", is a growing industry. America has great faith in individual talent, and dynamic and aggressive executives are so in demand that companies regularly mid each other's managerial ranks.

单选题{{B}}Directions:{{/B}} There are 4 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C, and D. You should decide on the best choice and mark your answer on the ANSWER SHEET by blackening the corresponding letter in the brackets. Is language, like food, a basic human need without which a child at a critical period of life can be starved and damaged? Judging from the drastic experiment of Frederick H in the thirteenth century, it may be. Hoping to discover what language a child would speak if he heard no mother tongue, he told the nurses to keep silent. All the infants died before the first year. But clearly there was more than lack of language here. What was missing was good mothering. Without good mothering, in the first year of life especially, the capacity to survive is seriously affected. Today no such severe lack exists as that ordered by Frederick. Nevertheless, some children are still backward in speaking. Most often the reason for this is that the mother is insensitive to the signals of the infant, whose brain is programmed to learn language rapidly. If these sensitive periods are neglected, the ideal time for acquiring skills passes and they might never be learned so easily again. A bird learns to sing and to fly rapidly at the right time, but the process is slow and hard once the critical stage has passed. Experts suggest that speech stages are reached in a fixed sequence and at a constant age, but there are cases where speech has started late in a child who eventually turns out to be of high IQ. At twelve weeks a baby smiles and makes vowel-like sounds; at twelve months he can speak simple words and understand simple commands; at twelve months he can speak simple words and understand simple commands; at eighteen months he has a vocabulary of three to fifty words. At three he knows about 1,000 words which be can put into sentences, and at four his language differs from that of his parents in style rather than grammar. Recent evidence suggests that an infant is born with the capacity to speak. What is special about man's brain, compared with that of the monkey, is the complex system which enables a child to connect the sight and feel of, say, a toy-bear with the sound pattern "toy-bear". And even more incredible is the young brain's ability to pick out an order in language from the mixture of sound around him, to analyze, to combine and recombine the parts of a language in new ways. But speech has to be induced, and this depends on interaction between the mother and the child, where the mother recognizes the signals in the child's babbling, grasping and smiling, and responds to them. Insensitivity of the mother to these signals dulls the interaction because the child gets discouraged and sends out only the obvious signals. Sensitivity to the child's nonverbal signals is essential to the growth and development of language.

单选题(Although) the wages for all the members of the working staff (increase regularly), so (their expenses do); for the prices for everything (are increasing dramatically) at the same time.

单选题The play was Uhilarious/U!

单选题I am disgusted ______ the way the couple talks about the actress"s private life.

单选题He had a considerable reputation in England as a critic and was the ______ exponent in this country of modem French literature.

单选题Tight-lipped elders used to say,"It's not what you want in this world, but what you get．" Psychology teaches that you do get what you want if you know what you want and want the fight things. You can make a mental blueprint of a desire as you would make a blueprint of a house, and each of us is continually making these blueprints in the general routine of everyday living．If we intend to have friends to dinner,we plan the menu, make a shopping list, decide which food to cook first, and such planning is an essential for any type of meal to be served． Likewise, if you want to find a job, take a sheet of paper,and write a brief account of yourself． In making a blueprint for a job, begin with yourself,for when you know exactly what you have to offer,you can intelligently plan where to sell your services． This account of yourself is actually a sketch of your working life and should include education, experience and references．Such an account is valuable．It can be referred to in filling out standard application blanks and is extremely helpful in personal interviews．While talking to you, your could-be employer is deciding whether your education, your experience, and other qualifications will pay him to employ you and your"wares"and abilities must be displayed in an orderly and reasonably connected manner． When you have carefully prepared a blueprint of your abilities and desires, you have something tangible to sell．Then you are ready to hunt for a job．Get all the possible information about vour could—be job, make inquiries as to the details regarding the job and the firm．Keep your eyes and ears open, and use your own judgement．Spend a certain amount of time each day seeking the employment you wish for,and keep in mind：Securing a job is your job now．

单选题Think of the ocean on a calm day. Ignoring the rise and fall of the waves, you might imagine the surface was dead flat the whole way across. You'd be wrong. Hills and valleys are as much as a feature of the sea as the land, although on a much smaller scale. These undulations have a variety of causes. Tides, currents, eddies, winds, river flow and changes in salinity and temperature push the sea level up in some places and down in others by as much as 2 meters. Ever tried swimming uphill? How do we map these oceanic hills and valleys? First, we need to know what the planet would look like without them. This is where the geoid (大地水准面) comes in. It is a surface where the Earth's gravitational potential is equal and which best fits the global mean sea level. It is approximately an ellipsoid, though uneven distribution of mass within the Earth means that it can vary from this ideal by up to 150 meters. The geoid represents the shape the sea surface would be if the oceans were net moving and affected only by gravity. Thus it can be used as a reference to measure any deviations in the ocean surface height that aren't caused by gravity—the hills and valleys, for instance, or any regional increase in sea level. So how do you measure the geoid and the ocean's irregular topography? It's complicated. Geophysicists calculate the geoid using data on variation in gravitational acceleration from several dozen satellites. The hills and valleys of the oceans are all very interesting, but can the geoid tell us anything more significant about the state of the planet? It certainly can. Knowing accurately where the geoid lies and how the Ocean surface deviates from it will help meteorologists spot changes in Ocean currents associated with climate change. The circumpolar current around Antarctic is one they are particularly interested in. It can also predict local climate variations produced by events such as El Nino, El Nino keeps warm water that would normally move westwards close to the coast of South America, deprives Southeast Asia of its monsoon rains, and increases rainfall on the west coast of the Ametlca. Since temperature changes cause changes in sea level, geoid-watchers should be able to prepare us before it strikes.

单选题Brazilian music is thoroughly imbued with African themes, and illustrious composers have long found inspiration in the black musical heritage.