单选题The passage ______.

单选题{{B}}Passage 4{{/B}} It was not "the comet of the century" experts predicted it might be. However, Kohoutek has provided a bonanza of scientific information. It was first spotted 370 million miles from Earth, by an astronomer who was searching the sky for asteroids, and after whom the comet was named. Scientists who tracked Kohoutek the ten months before it passed the Earth predicted the comet would be a brilliant spectacle. But Kohoutek fell short of these predictions, disappointing millions of amateur sky watchers, when it proved too pale to be seen with the unaided eye. Researchers were very happy nonetheless with the new information they were able to glean from their investigation of file comet. Perhaps the most significant discovery was the identification of two important chemical compounds -- methyl cyanide and hydrogen cyanide -- never before seen in comets, but found it the far reaches of interstellar space. This discovery revealed new clues about the origin of comets. Most astronomers agree that comets are primordial remnants from the formation of the solar system, but whether they were born between Jupiter and Neptune or much farther out toward interstellar space has been the subject of much debate. If compounds no more complex than ammonia and methane, key components of Jupiter, were seen in comets, it would suggest that comets form within the planetary orbits. But more complex compounds, such as the methyl cyanide found in Kohoutek, point to formation far beyond the planets; there the deep freeze of space has kept them unchanged.

单选题Accordingtotheinterview,whatistheuniquefeatureofmagazineTheWormofEnglish?A.ItsarrangementinthebilingualEnglish-Chineseformanditsdetailedexplanatorynotes.B.Itstasteforpeopleofallkindsoflife.C.Itscolorfulpicturesoftheworld.D.Itsliteraryworks.

单选题All the wisdom of the ages, all the stories that have delighted mankind for centuries, are easily and cheaply (21) to all of us (22) the covers of books -- but we must know how to avail ourselves (23) this treasure and how to get (24) from it. The most (25) people all over the world, are (26) who have never discovered how (27) it is to read good books. I am very interested in people, in meeting them and (28) about them. Some of the most (29) people I've met existed only in a Writer's imagination, then (30) the pages of his book, and then, again, in my imagination. I've found in books new friends, new societies, new words. If I am interested in people, others are interested not so much in who (31) in how. Who in the books includes everybody from science-fiction superman two hundred centuries in the future all the way back to the first (32) in history; how (33) everything from the ingenious explanations of Sherlock Holmes (34) the discoveries of science and ways of teaching manners to children. Reading can make our minds feel pleased, (35) means that it is a little like a sport: your eagerness and knowledge and quickness (36) you a good reader. Reading is (37) , not because the writer is telling you something, (38) because it makes your mind work. Your own imagination works together with the (39) or even goes beyond his. Your experience, (40) his, brings you to the same or different conclusions, and your ideas develop as you understand his.

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单选题The second paragraph is mainly about ______.

单选题Biologically, there is only one quality which distinguishes us from animals: the ability to laugh. In a universe which appears to be utterly devoid of humor, we enjoy this supreme luxury. And it is a luxury, for unlike any other bodily process, laughter does not seem to serve a biologically useful purpose. In a divided world, laughter is a unifying force. Human beings oppose each other on a great many issues. Nations may disagree about systems of government and human relations may be plagued by ideological factions and political camps, but we all share the ability to laugh. And laughter, in turn, depends on that most complex and subtle of all human qualities: a sense of humor. Certain comic stereotypes have a universal appeal. This can best be seen from the world-wide popularity of Charlie Chaplin"s early films. The little man at odds with society never fails to amuse no matter which country we come from. As that great commentator on human affairs, Dr. Samuel Johnson, once remarked, "Men have been wise in very different modes; but they have always laughed in the same way." A sense of humor may take various forms and laughter may be anything from a relined tinkle to an earth quaking roar, but the effect is always the same. Humor helps us to maintain a correct sense of values. It is the one quality which political fanatics appear to lack. If we can see the funny side, we never make the mistake of taking ourselves too seriously. We are always reminded that tragedy is not really far removed from comedy, so we never get a lopsided view of things. This is one of the chief functions of satire and irony. Human pain and suffering are so grim; we hover so often on the brink of war; political realities are usually enough to plunge us into total despair. In such circumstances, cartoons and satirical accounts of somber political e vents redress the balance. They take the wind out of pompous and arrogant politicians who have lost their sense of proportion. They enable us to see that many of our most profound actions are merely comic or absurd. We laugh when a great satirist like Swift writes about war in Gulliver"s Travels. The Lilliputians and their neighbors attack each other because they can"t agree which end to break an egg. We laugh because we are meant to laugh; but we are meant to weep too. It is no wonder that in totalitarian regimes any satire against the establishment is wholly banned. It is too powerful a weapon to be allowed to flourish in totalitarian regimes. The sense of humor must be singled out as man"s most important quality because it is associated with laughter. And laughter, in turn, is associated with happiness. Courage, determination, initiative--these are qualities we share with other forms of life. But the sense of humor is uniquely human. If happiness is one of the great goals of life, then it is the sense of humor that provides the key.

单选题How does the tool called an awl play a part in the story?

单选题Whatisthewoman'spresentposition?A.AnemployeeinthecitycouncilatBirmingham.B.AssistantDirectoroftheAdmissionOffice.C.HeadoftheOverseasStudentsOffice.D.SecretaryofBirminghamMedicalSchool.

单选题According to the passage, cancers may take some healthy steps other than ______.

单选题What does David Harrison mean when he says “the same job”?

单选题Some working parents and teachers once believed that

单选题Slavery has played a significant role in the history of the U.S. It existed in all the English mainland colonies and most of the Founding Fathers also had slaves, as did eight of the first 12 presidents. Dutch traders brought 20 Africans to Jamestown, Virginia, as early as 1619, however, throughout the 17th century the number of Africans in the English mainland colonies grew very slowly. At that time, colonists used two other sources of unfree labor: Native American slaves and European indentured servants. During those years, every colony had some Native American slaves, but their number was limited. Indian men avoided performing agricultural labor, because they viewed it as women"s work, and colonists complained that they were too "haughty". The more important was that the settlers found it more convenient to sell Native Americans captured in war to planters in the Caribbean than to turn them into slaves, because they often resisted and it was not hard for the slaves to escape. Later, the policy of killing Indians or driving them away from white settlements was proposed and it contradicted with their widespread employment as slaves. The other form of labor was the white indentured servitude. Most indentured servants consisted of poor Europeans. Desiring to escape tough conditions in Europe and take advantage of fabled opportunities in America, they traded three to seven years of their labor in exchange for the transatlantic passage. At first, it was mainly English who were the white indentured servitude but later increasingly Irish, Welsh, and German joined. They were essentially temporary slaves and most of them served as agricultural workers although some, especially in the North, were taught skilled trades. During the 17th century, they performed most of heavy labor in the Southern colonies and also consisted of the bulk of immigrants to those colonies. At the end of the 17th century, in order to meet the labor need, landowners in America turned to African slaves. During the late 17th and 18th centuries, thanks to the dominant position of England in terms of naval superiority, English traders ( some of whom lived in English America) transported millions of Africans across the Atlantic. And the transatlantic slave trade produced one of the largest forced migrations in history, blacks ( the great majority of whom were slaves) increasing from about 7 percent of the American population in 1680 to more than 40 percent by the middle of the 18th century.