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单项选择题In May 1989, space shuttle 'Atlantis' released in outer space the space probe 'Megal-lan', which is now on her 15-month and one-billion-kilometer flight to Venus. A new phase in space exploration has begun. The planet Venus is only slightly smaller than the earth; it is the only other object in the solar system, in fact, that even comes close to the earths size. Venus has a similar density, so it is probably made of approximately the same stuff, and it has an atmosphere, complete with clouds. It is also the closest planet to the earth, and thus the most similar in distance from the sun. In short, Venus seems to justify its long-held nickname of 'the earths twin'. The surface temperature of Venus reaches some 900 degree F. Added to that is an atmospheric pressure about 90 times the earths. High overhead in the carbon dioxide(CO2)that passes for air is a layer of clouds, perhaps 10 to 20 miles thick, whose little drops consist mostly of sulfuric acid(H2SO4). Water is all but nonexistent. Born with so many fundamental similarities to the earth, how did Venus get to be so radically different? It is not just an academic matter. For all its extremes, Venus is a valuable laboratory for researchers studying the weather and climate of the earth. It has no the earths oceans, so the heat-transport and other mechanisms are greatly simplified. In addition, the planet Venus takes 243 earth-days to turn once on its axis, so incoming heat from the sun is added and distributed at a more leisurely, observable pace. Question: The main idea of this passage is about______.A．problems of space travelB．scientific methods in space explorationC．the importance of Venus to the earthD．conditions on Venus

单项选择题The United States is a country made up of many different races. Usually they are mixed together and cant be told from one another. But many of them still, talk about where their ancestors came from. It is something they are proud of. The original Americans, of course, were the Indians. The so-called white men who then came were mostly from England. But many came from other countries like Germany and France. One problem the United States has always had is discrimination. As new groups came to the United States they found they were discriminated against. First it was the Irish and Italians. Later it was the blacks. Almost every group has been able to finally escape this discrimination. The only immigrants who have not are the blacks. Surprisingly enough the worst discrimination today is shown towards the Indians. One reason the Indians are discriminated against is that they have tried so hard to keep their identity. Of course they are not the only ones who have done so. The Japanese have their Little Tokyo in Los Angeles and the Chinese a Chinatown in New York. The Dutch settlement in Pennsylvania also stays separate from other people. Their towns are like something from the 19th century. They have a different reason from the other groups for staying separately. They live separately for religious reasons rather than keep together in a racial group. Although some groups have kept themselves separate and others have been discriminated against, all groups have helped make the United States a great country. There is no group that has not helped in some way. And there is no group that can say they have done the most to make it a great country. Many people still come from other countries to help the United States grow. A good example is the American project that let a man walk on the moon. It was a scientist from Germany who was most responsible for doing that. It is certain that in the future the United States will still need the help of people from all racial groups to remain a great country. Questions:The average untrained native speaker at University of Minnesota______.A．reads at about 245 w. p. m.B．reads at 600 w. p. m.C．reads at about 300 w. p. m.D．cannot read difficult works in translation

单项选择题The comprehension passages on this course are designed to help you increase your reading speed. A higher reading rate, with no loss of comprehension, will help you in other subjects as well as English, and the general principles apply to any language. Naturally, you will not read every book at the same speed. You would expect to read a newspaper, for example , much more rapidly than a physics or economics textbook—but you can raise your average reading speed over the whole range of materials you wish to cover so that the percentage gain will be the same whatever kind of reading you are concerned with. The reading passages which follow are all of an average level of difficulty for your stage of instruction. They are all approximately 500 words long. They are about topics of general interest which do not require a great deal of specialized knowledge. Thus they fall between the kind of reading you might find in your textbooks and the much less demanding kind you will find in a newspaper or light novel. If you read this kind of English, with understanding, at, say, 400 words per minute, you might skim through a newspaper at perhaps 650~700, while with a difficult textbook you might drop to 200 or 250. Perhaps you would like to know what reading speeds are common among native English-speaking university students and how those speeds can be improved. Tests in Minnesota, U. S. , for example, have shown that students without special training can read English of average difficulty, for example, Tolstoys War and Peace in translation, at speeds of between 240 and 250 w. p. m. with about 70% comprehension. Minnesota claims that after 12 half-hour lessons, once a week, the reading speed can be increased, with no loss of comprehension, to around 500 w. p. m. It is further claimed that with intensive training over seventeen weeks, speeds of over 1 000 w. p. m. can be reached, but this would be quite exceptional. Questions:The special season of pre-1949 films mentioned______.A．was shown in cities all over the worldB．consisted mainly of films banned since 1957C．was organized by the China Film ArchiveD．gave young film-makers a second chance to see films of the 1930s and 1940s

单项选择题I wonder if you realize just how many others share your problem. It is so common for people to distort the truth about themselves. Sometimes its just an invented excuse when youre late for something or a pretence that you like someone you dont. These white lies dont usually harm anyone and indeed often help smooth over difficult social situations. They certainly are embarrassing if exposed but, on the whole, theyre easily forgiven. What you describe is a habit of lying that is more serious than this. I suspect that the lies you tell are ways of defending an idea you have of your own worth. People who have doubts about their own self-esteem often worry that others will judge them as harshly as they feel they deserve because of a secret idea that they are pretty worthless. In other words, they create a false picture of themselves, a picture of someone who meets all the expectations they think others have of them. And as you say, that causes problems—since they have to keep living up to that image. At the same time, they have to tell further lies to cover the stories they have already told. According to some authorities, this is particularly among women especially those who have few opportunities to develop an adequate sense of self-worth. I suggest you give yourself one day during which you stick solidly to the truth about yourself. Give yourself a small treat at the end of the day if you have managed to keep it up. Wait a week and then try it again. Once you have achieved three separate lie-free days, see if you can cope with three days running, and then extend it to a whole week. Dont make a promise to yourself that you will never lie again because almost certainly you will—its too much to take on at once. Try to change things little by little, by setting yourself manageable targets. After a while, youll wonder why you ever had the problem at all. Question: The expression 'living up to' in the passage can best be replaced by______.A．glowing up withB．living withC．seekingD．sticking to

单项选择题A neutral setting is very important for people holding different position in that______.A．it provides more space for both sidesB．there is less interface in a neutral settingC．it makes both sides feel close to each otherD．it is favorable to both sides