单选题In every cultivated language, there are two great classes of words which, taken together, comprise the whole vocabulary. First, there are those words (51) which we become acquainted in daily conversation, which we (52) , that is to say, from the (53) of our own family anti from our familiar associates, and (54) we should know and use (55) we could not read or write. They (56) the common things of lift, anti are the stock in trade of all who (57) the language. Such words may be called" popular", since they belong to the people (58) and are not the exclusive (59) of a limited class. On the other hand ,our language (60) a multitude of words which are comparatively seldom used in ordinary conversation. Their meanings are known to every educated person, but there is little (61) to use them at home or in the market-place. Our (62) acquaintance with them comes not from our mother's lips or from the talk of our schoolmates, but from books that we read, lectures that we attend, or the more formal conversation of highly educated speakers who arc discussing some particular (63) in a style appropriately elevated above the habitual (64) of everyday life. Such words are called "learned", and the (65) between them and the "popular" words is of great importance to a right understanding of linguistic process.

单选题I {{U}}rarely{{/U}} play basketball. A. normally B. seldom C. frequently D. usually

单选题 Easy Learning Students should be jealous. Not only do babies get to doze their days away, but they've also mastered the fine art of learning in their sleep. By the time babies are a year old, they can recognize a lot of sounds and even simple words. Marie Cheour at the University of Turku in Finland suspected that they might progress this fast because they learn language while they sleep as well as when they are awake. To test the theory, Cheour and her colleagues studied 45 newborn babies in the first few days of their lives. They exposed all the infants to an hour of Finnish vowel sounds— one that sounds like "oo", another like "ee" and a third boundary vowel peculiar to Finnish and similar languages that sounds like something in between. EEG recordings of the infants brains before and after the session showed that the newborns could not distinguish the sounds. Fifteen of the babies then went back with their mothers, while the rest were split into two sleep-study groups. One group was exposed throughout their night-time sleeping hours to the same three vowels, while the others listened to other, easier-to-distinguish vowel sounds. When tested in the morning, and again in the evening, the babies who'd heard the tricky boundary vowel all night showed brainwave activity indicating that they could now recognise this new sound. They could identify the sound even when its pitch was changed, while none of the other babies could pick up the boundary vowel at all. Cheour doesn't know how babies accomplish this night-time learning, but she suspects that the special ability might indicate that unlike adults, babies don't "turn off" their cerebral cortex while they sleep. "The skill probably fades in the course of the first year of life", she adds, "so forget the idea that you can pick up tricky French vowels as an adult just by slipping a language tape under your pillow." But while it may not help grown-ups, Cheour is hoping to use the sleeping hours to give remedial help to babies who are genetically at risk of language disorders.

单选题For young children, getting dressed is a {{U}}complicated{{/U}} business. A.strange B.complex C.personal D.funny

单选题{{B}}第三篇{{/B}} There are two great mysteries about the beach. One is why human beings flock there by thousands, only to prostrate(俯卧) themselves in dense packs of glistening flesh. The other is why the sand goes there. Strange as it seems, oceanographers have never really understood why sand piles up on the shore. Now Douglas Inman and Daniel Conley think they have solved the puzzle. The puzzle had to do with waves. Though it might seem intuitive that waves carry water to shore, and sand along with it, it's not that simple. The crest(浪尖)of a passing wave lifts a given hit of water upward and landward, but the ensuing trough(波谷) pushes the water back down and Out to sea. Near the bottom, there the sand is, the water was always assumed to just slide back and forth—and the sand with it. "If you take a very aloof look at a beach," says Inman, "you'll realize that if the two motions move sand back and forth the same amount, then all the sand should end up in deep water.' So for beaches to exist, the crest's onshore flow must somehow move enough sand up the beach to counter the seaward tug of both the trough and gravity . The pressure changes in the sand bed, Inman and Conley think, are the key to beach creation. They found that sand doesn't just slide back and forth with each passing wave. Under a trough, it does slide seaward, in a thin layer just above the bottom. But under a crest its movement is often more elaborate. The higher pressure under a crest—higher because the water is piled higher—forces water into the porous(多孔的) sand. This creates strong whirlpools just above the sand, which help loosen it. As the crest passes overhead, the sand first rushes across the bottom; then it abruptly turns violent lifting off the bottom in large, boiling bunches. Finally, just after the crest passes, the sand explodes up into the great water column. The boiling and rushing move more sand than the backsliding under a trough, so there's a net movement of sand toward the shore.

单选题While we don't agree, we continue to be friends. A．Because B．Where C．Although D．Whatever

单选题He is suspicious about her motivation to attend the party.A. sureB. angryC. doubtfulD. worded

单选题The attack on Fort Sumter near Charleston provoked a sharp response from the North, which {{U}}led to{{/U}} the American Civil War.

单选题The girl is gazing at herself in the mirror.

单选题Patricia stared at the other girls with {{U}}resentment{{/U}}. A. anger B. doubt C. love D. surprise

单选题According to the American Red Cross, blood and plasma donors are urgently needed after natural disasters or other catastrophes.

单选题Then something happened to Cosmos. It may have sprung a small leak ; perhaps it struck a tiny asteroid (小行星) or a piece of debris. Nobody knows for sure, but for one reason or another. Cosmos drifted off course. T. S. Kelso, an aeronautics expert at Analytical Graphics. which provides satellite-tracking services to NASA, noticed that the orbits of Cosmos and Iridium were bringing the two satellites closer to each other all the time. In February he issued a waming that they would pass within a kilometer of one another. He was right. On Feb. 10, Motorola lost track of Iridium's signal. Over the next few days, Kelso and others surmised (推测) that what many had feared for years had finally come to pass: two intact (完好无损的) satellites had collided head on. What had happened to Cosmos and Iridium in February according to Kelso?A. They had had mechanical problems.B. They had struck a tiny asteroid.C. They has struck a piece of debris.D. They had collided into each other.

单选题A New Book All day long, you are affected by large forces. Genes influence your intelligence and willingness to take risks. Social dynamics unconsciously shape your choices. Instantaneous perceptions set off neutral reactions in your head without you even being aware of them. Over the past few years, scientists have made a series of exciting discoveries about how these deep patterns influence daily life. Nobody has done more to bring these discoveries to public attention than Malcolm Gladwell. Gladwell's new book Outliers seems at first glance to be a description of exceptionally talented individuals. But in fact, it's another book about deep patterns. Exceptionally successful people are not lone pioneers who created their own success, he argues. They are the lucky beneficiaries of social arrangements. Gladwell's noncontroversial claim is that some people have more opportunities than others. Bill Gates was lucky to go to a great private school with its own computer at the dawn of the information revolution. Gladwell's book is being received by reviewers as a call to action for the Obama Age. It could lead policy makers to finally reject policies built on the assumption that people are coldly rational profit-maximizing individuals. It could cause them to focus more on policies that foster relationships, social bonds and cultures of achievement. Yet, I can't help but feel that Gladwell and others who share his emphasis are preoccupied with the coolness of the discoveries. They've lost sight of the point at which the influence of social forces ends and the influence of the self-initiating individual begins. Most successful people begin with two beliefs: the future can be better than the present, and I have the power to make it so. They were often showered by good fortunes, but relied at crucial moments upon achievements of individual will. These people also have an extraordinary ability to consciously focus their attention. Control of attention is the ultimate individual power. People who can do that are not prisoners of the stimuli around them. They can choose from the patterns in the world and lengthen their time horizons. Gladwell's social determinism overlooks the importance of individual character and individual creativity. And it doesn't fully explain the genuine greatness of humanity's talents. As the classical philosophers understood, examples of individual greatness inspire achievement more reliably than any other form of education.

单选题Eleanor Roosevelt"s dedication to humanitarian causes won her affection and honor at home and abroad .

单选题He does nothing that breaks the interests of the collective.A. runs forB. runs againstC. runs overD. runs into

单选题Your father is furious about the damage you have done to the flower beds.A. angryB. anxiousC. uncertainD. worried

单选题Prohibition in the United States ushered in an era of crime and corruption.

单选题下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 California Gives Green Light to Space Solar Power Energy beamed down from space is one step closer to reality，now that California has given the green light to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatts(兆瓦)of power beamed down from solar-power satellites beginning in 2016．But some major challenges will have to be overcome if the technology is to be used widely． A start-up company called Solaren is designing the satellites，which it says will use radio waves to beam energy down to a receiving station on Earth． The attraction of collecting solar power in space is the almost uninterrupted sunshine available in geosynchronous(与地球同步的)orbit．Earth-based solar ceils，by contrast，can only collect sunlight during daytime and when skies are clear． But space．based solar power must grapple(努力克服)with the high cost per kilogram of launching things into space，says Richard Schwartz of Purdue University in West Lafayette，Indiana．“If you're talking about it being economically viable for power of the Earth，it's a tough go，”he says． Cal Boerman，Solaren's director of energy services，says the company designed its satellites with a view to keeping launch costs down．“We knew we had to come up with a different，revolutionary design，” he says．A patent the company has won describes ways to reduce the system's weight，including using inflatable mirrors to focus sunlight on solar cells，so a smaller number can collect the same amount of energy． But using mirrors introduces other challenges，including keeping the solar cells from overheating，says Schwartz．“You have to take care of heat dissipation(散发)because you're now concentrating a lot of energy in one place，”he says．According to the company's patent，Solaren's solar cells will be connected to radiators to help keep them cool． Though Boerman says the company believes it can make space-based solar power work，it is not expecting to crowd out other forms of renewable energy．Laws in California and other states require increasing use of renewable energy in coming years，he points out．“To meet those needs，we're going to need all types of renewable energy sources，”he says．

单选题The word "period" in Paragraph 3 means the length of time

单选题These pictures will show you ______ our village look like.A. howB. whatC. whenD. that