单选题This doesn't mean that wind and solar, which currently provide less than 1 percent of the world's primary energy, will replace fossil fuels, which provide 82 percent. In fact, while companies like BP and Shell are cutting back on commercial projects in wind and solar, Big Oil is taking a closer look at how they might be used to increase efficiency internally, or to flee up increasingly profitable fossil fuels, like natural gas, for commercial sale. For example. Valero is building windmills to power refineries, and Chevron is using solar power to make steam to extract tough-to-reach oil. When you consider that the top 15 oil and gas companies have a market capitalization of $1.9 trillion, it's clear that these firms themselves have the potential to be major renewable customers. Big oil is thinking of using wind and solarA. to free up fossil fuels for commercial sale.B. to replace fossil fuels for commercial sale.C. to increase efficiency of fossil fuels use.D. to reduce harm to the environment.

单选题The Threat to Kiribati The people of Kiribati are afraid that one day in the not-too-distant future, their country will disappear from the face of the earth-literally. Several times this year, the Pacific island nation has been flooded by a sudden high tide. These tides, which swept across the island and destroyed houses, came when there was neither wind nor rain. “This never happened before," say the older citizens of Kiribati. What is causing these mysterious high tides? The answer may well be global warming. When fuels like oil and coal are being burned, pollutants (污染物) are released; these pollutants trap heat in the earth's atmosphere. Warmer temperatures cause water to expand and also create more water by melting glaciers (冰川) and polar (级地的) ice caps. If the trend continues, scientists say, many countries will suffer. Bangladesh, for example, might lose one-fifth of its land. The coral (珊瑚) island nations of the Pacific, like Kiribati and the Marshall Islands, however, would face an even worse fate-they would be swallowed by the sea. The loss of these coral islands would be everyone's loss. Coral formations are home to more species than any other place on earth. The people of these nations feel frustrated. The sea, on which their economies have always been based, is suddenly threatening their existence. They don't have the money for expensive technological solutions like seawalls. And they have no control over the pollutants, which are being released mainly by activities in large industrialized countries. All they can do is to hope that industrialized countries will take steps to reduce pollution.

单选题I catch cold now and then .

单选题How did Daedalus manage to escape to Sicily, according to the passage?

单选题A Tale of Scottish Rural Life Lewis Grassic Gibbon's Sunset Song (1932) was voted" the best Scottish novel of all time" by Scotland's reading public in 2005. Once considered shocking for its frank description of aspects of the lives of Scotland's poor rural farmers, it has been adapted for stage, film, TV and radio in recent decades. The novel is set on the fictional estate of Kinraddie, in the farming country of the Scottish northwest in the years up to and beyond World War t. At its heart is the story of Chris, who is both part of the community and a little outside it. Grassic Gibbon gives us the most detailed and intimate account of the life of his heroine (女主人公). We watch her grow through a childhood dominated by, her cruel but hard- working father; experience tragedy (her mother's suicide and murder of her twin children) and learn about her feelings as she grows into a woman. We see her marry, lose her husband, then marry again. Chris has seemed so convincing a figure to some female readers that they cannot believe that she is the creation of a man. But it would be misleading to suggest that this book is just about Chris. It is truly a novel of a place and its people. Its opening section tells of Kinraddie's long history, in a language that imitates the place's changing patterns of speech and writing. The story itself is amazingly full of characters and incidents. It is told from' Chris' point of view but also from that of the gossiping community, a community where everybody knows everybody elss's business and nothing is ever forgotten; Sunset Song has a social theme too. It is concerned with what Grassic Gibbon perceives as the destruction of traditional Scottish rural life first by modernization and then by World War I. Gibbon tried hard to show how certain characters resist the war. Despite this, the war takes the young men away, a number of them to their deaths. In particular, it takes away Chris' husband, Ewan Tavendale. The war finally kills Ewan, but not in the way his widow is told. In fact, the Germans aren't responsible for his death, but his own side. He is shot because he is said to have run away from a battle. If the novel is about the end of one way of life it also looks ahead, It is a "Sunset Song" but is concerned too with the new Kinraddie, indeed of the new European world. Grassic Gibbon went on to publish two other novels about the place that continue its story.

单选题This model embodies many new features.

单选题Science and Truth "FINAGLE" (欺骗) is not a word that most people associate with science. One reason is that the image of the scientist is of one who always (51) data in an impartial (不偏不倚的) search for truth. In any debate— (52) intelligence, schooling, energy—the phrase "science says" usually disarms opposition. But scientists have long acknowledged the existence of a "finagle factor"—a tendency by many scientists to give a helpful change to the data to (53) desired results. The latest of the finagle factor in action comes from Stephen Jay Gould, a Harvard biologist, who has (54) the important 19th century work of Dr. Samuel George Morton. Morton was famous in his time for analysing the brain (55) of the skulls as a measure of intelligence. He concluded that whites had the largest brains, that the brains of Indians and blacks were smaller, and (56) , that whites constitute a superior race. Gould went back to Morton's original data and concluded that the (57) were an example of the finagle at work. He found that Morton's "discovery" was made by leaving out embarrassing data, (58) incorrect procedures, and changing his criteria—again, always in favour of his argument. Morton has been thoroughly discredited by now and scientists do not believe that brain size reflects (59) . But Gould went on to say Morton's story is only an example of a common problem in (60) work. Some of the leading figures in science are (61) to have used the finagle factor. Gould says that Isaac Newton fudged out (捏造) to support at least three central statements that he could not prove. And so (62) Laudius Ptolemy, the Greek astronomer, whose master work, Almagest , summed up the case for a solar system that had the earth as its centre. Recent (63) indicate that Ptolemy either faked some key data or resorted heavily to the finagle factor. All this is important because the finagle factor is still at work. For example, in the artificial sweetener controversy, for example, it is (64) that all the studies sponsored by the sugar industry find that the artificial sweetener is unsafe, (65) all the studies sponsored by the diet food industry find nothing wrong with it.

单选题Anxiety about financial matter lessened somewhat when, in 1910, the United States accepted responsibility for Liberia's survival. A. descended B. faded C. diminished D. highlighted

单选题Anyone who does not have a free ticket must pay the fee for going in .

单选题This remarkable technology provides far greater clarity than conventional x-ray. A. accuracy B. precision C. degree D. correctness

单选题{{B}}第三篇{{/B}} There are some earth phenomena you can count on, but the magnetic field, some say, is not one of them. It fluctuates in strength, drifts from its axis, and every few 100,000 years undergoes a dramatic polarity reversal —a period when north pole becomes south pole and south pole becomes north pole. But how is the field generated, and why is it so unstable? Groundbreaking research by two French geophysicists promises to shed some light on the mystery. Using 80 metres of deep sea sediment (沉淀物) core, they have obtained measurements of magnetic-field intensity that span 11 polarity reversals and four million years. The analysis reveals that intensity appears to fluctuate with a clear, well-defined rhythm. Although the strength of the magnetic field varies irregularly during the short tern, there seems to be an inevitable long-term decline preceding each polarity reversal. When the poles flip—a process that takes several hundred thousand years--the magnetic field rapidly regains its strength and the cycle is repeated. The results have caused a stir among geophysicists. The magnetic field is thought to originate from molten (熔化的) iron in the outer core, 3,000 kilometers beneath the earth's surface. By studying mineral grains found in material ranging from rocks to clay articles, previous researchers have already been able to identify reversals dating back 170 million years, including the most recent switch 730,000 years age. How and why they occur, however, has been widely debated. Several theories link polarity flips to external disasters such as meteor (陨星) impacts. But Peter Olson, a geophysicist at the Johns Hopkins University in Baltimore, says this is unlikely if the French researchers are right. In fact, Olson says intensity that predictably declines from one reversal to the nest contradicts 90 percent of the models currently under study. If the results prove to be valid geophysicists will have a new theory to guide them in their quest to understand the earth's inner physics. It certainly points the direction for future research.

单选题Mary looked pale and weary .

单选题Three world-class tennis players came to {{U}}contend{{/U}} for this title. A. argue B. claim C. wish D. compete

单选题As nineteenth-century American cultural aspirations expanded, women stepped into a new role as interpreters of art, both by writing works on art history and by teaching art.

单选题 Shakespeare When talking about the world's greatest poet and greatest dramatist, only one name can possible suggest itself;that of William Shakespeare. Nearly every Englishman has some knowledge, however slight, of the work of this greatest writer. We use words, phrases and quotations form Shakespeare's writings that have become part of the common property of English-peaking people. Most of the time we are probably unaware of the source of the words we use. For example, and old lady, after seeing a performance of Hamlet complained, "It was full of well-known proverbs and quotations!" Shakespeare made full use of the great resources of the English language. Most of us use about five thousand words in our normal employment of English; Shakespeare in his works used about twenty-five thousand! There is probably no better way for a foreigner (or an Englishman) to appreciate the richness and variety of the English language than by studying the various ways in which Shakespeare used it. Such a study is well worth the effort, even thought some aspects of English and the meaning of many words, have changed since Shakespeare's day. It is a pity that we know so little about the life of the greatest English author. We only know that he was born in 1564 in Stratford on Avon, and that then died there in 1616. He almost certainly attended the Grammar School in the town, but of this we cannot be sure. We know he was married there in 1582 and had three children. We know that he spent much of his life in London, writing his masterpieces. But this is almost all that we do know. However, what is important about Shakespeare's life is not its incidental details but its products, the plays and the poems. For many years scholars have been trying to add a few facts about Shakespeare's life to the small number we already posses and for an equally long time critics have been theorizing about the plays. Sometimes indeed, it seems that the poetry of Shakespeare will disappear beneath the great mass of comment that has been written upon it. Fortunately this is not likely to happen. Shakespeare's poetry and Shakespeare's characters (Macbeth, Othello, Hamlet and all the others) have long delighted not just the English but lovers of literature everywhere, and will continue to do so after the scholars and commentators and all their works have been forgotten.

单选题The city was literally destroyed.A. word-for-wordB. eventuallyC. actuallyD. likely

单选题The most crucial problem any economic system faces is how to use its scarce resources.A. puzzlingB. difficultC. terrifyingD. urgent

单选题The people in that remote area still live on humble means because the economy there is underdeveloped.A. difficultB. modestC. arduousD. domestic

单选题Before the development of movable metal type in the mid-fifteen century, news was disseminated by word of mouth, by letter, or by public notice.

单选题The mountains look glorious at sunrise.