单选题Acetate is one of the most important artificial fibers.

单选题 One Good Reason to Let Smallpox Live It's now a fair bet that we will never see the total extinction of the smallpox virus. The idea was to cap the glorious achievement of 1980, when smallpox was eradicated in the wild, by destroying the killer virus in the last two labs that are supposed to have it—one in the US and one in Russia. If smallpox had truly gone from the planet, what point was there in keeping these reserves? {{U}} {{U}} 1 {{/U}} {{/U}}reality, of course, it was naive to {{U}} {{U}} 2 {{/U}} {{/U}}that everyone would let {{U}} {{U}} 3 {{/U}} {{/U}}of such a potent potential weapon. Undoubtedly several nations still have {{U}} {{U}} 4 {{/U}} {{/U}}vials. {{U}} {{U}} 5 {{/U}} {{/U}}the last "official" stocks of live virus bred mistrust of the US and Russia, {{U}} {{U}} 6 {{/U}} {{/U}}no obvious gain. Now American researchers have {{U}} {{U}} 7 {{/U}} {{/U}}an animal model of the human disease, opening the {{U}} {{U}} 8 {{/U}} {{/U}}for tests on new treatments and vaccines. So once again there's a good reason to {{U}} {{U}} 9 {{/U}} {{/U}}the virus—just in {{U}} {{U}} 10 {{/U}} {{/U}}the disease puts in a reappearance. How do we {{U}} {{U}} 11 {{/U}} {{/U}}with the mistrust of the US and Russia? {{U}} {{U}} 12 {{/U}} {{/U}}. Keep the virus {{U}} {{U}} 13 {{/U}} {{/U}}international auspices in a well-guarded UN laboratory that's open to all countries. The US will object, of course, just as it rejects a multilateral approach to just about everything. But it doesn't {{U}} {{U}} 14 {{/U}} {{/U}}the idea is wrong. If the virus {{U}} {{U}} 15 {{/U}} {{/U}}useful, then let's make it the servant of all humanity—not just a part of it.

单选题 The Barbie Dolls In the mid 1940's, the young ambitious duo Ruth and Elliot Handler, owned a company that made wooden pictures frames. It was in 1945 that Ruth and Elliot Handler joined with their close friend Harold Mattson to form a company that would be known for the most famous and successful doll ever created. This company would be named MATTEL, MATT for Mattson and EL for Elliot. In the mid 1950's, while visiting Switzerland, Ruth Handler purchased a German Lilli doll. Lilli was a shapely, pretty fashion doll first made in 1955. She was originally fashioned after a famous cartoon character in the West German Newsletter, Build. Lilli is the doll that would inspire Ruth Handler to design the Barbie doll. With the help of her technicians and engineers at Mattel, Barbie was born. Ruth then hired Charlotte Johnson, a fashion designer, to create Barbies wardrobe. It was in 1958 that the patent for Barbie was obtained. This would be a fashion doll unlike any of her time. She would be long limbed, shapely, beautiful, and only 11.5 inches tall. Ruth and Elliot would name their new fashion doll after their own daughter, Barbie. In 1959, the Barbie doll would make her way to the New York Toy Show and receive a cool reception from the toy buyers. Barbie has undergone a lot of changes over the years and has managed to keep up with current trends in hairstyles, makeup and clothing. She is a reflection of the history of fashion since her introduction to the toy market. Barbie has a universal appeal and collectors both young and old enjoy time spent and memories made with their dolls.

单选题Elements of Art Throughout the history of the arts, the nature of creativity has remained constant to artists. No matter what objects they select, artists are to bring forth new forces and forms that cause change—to find poetry where no one has ever seen or experienced it before. Landscape (风景) is another unchanging element of art. It can be found from ancient times through the 17th-century Dutch painters to the 19th-century romanticists and impressionists. In the 1970s Alfred Leslie, one of the new American realists, continued this practice. Leslie sought out the same place where Thomas Cole, a romanticist, had produced paintings of the same scene a century and a half before. Unlike Cole who insists on a feeling of loneliness and the idea of finding peace in nature, Ledge pains what he actually sees. In his paintings, there is no particular change in motion, and he includes ordinary things like the highway in the background. He also takes advantage of the latest developments of color photography (摄影术) to help both the eye and the memory when he improves his painting back in his workroom. Besides, all art begs the age-old question: What is real? Each generation of artists has shown their understanding of reality in one form or another. The impressionists saw reality in brief emotional effects, the realists in everyday subjects and in forest scenes, and the Cro-Magnon cave people in their naturalistic drawings of the animals in the ancient forests. To sum up, understanding reality is a necessary struggle for artists of all periods. Over thousands of years the function of the arts has remained relatively constant. Past or present, eastern or western, the arts are a basic part of our immediate experience. Many and different are the faces of art, and together they express the basic need and hope of human beings.

单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 {{B}}Complaining is useful{{/B}} Complaining about faulty goods or bad service is never easy. Most people dislike making a fuss. But if something you have bought is faulty or does not do what was claimed for it, you are not asking for a favour to get it put right. It is the shopkeeper's responsibility to take the complaint seriously and to replace or repair a faulty article or put right poor service, because he is the person with whom you have entered into an agreement. The manufacturer may have a part to play but that comes later. Complaints should be made to a responsible person. Get back to the shop where you bought the goods, taking with you any receipt you may have. Ask to see the buyer in a large store. In a small store the assistant may also be the owner so you can complain directly. In a chain store ask to see the manager. If you telephone, ask the name the person who handles your enquiry, otherwise you many never find out who dealt with the complaint later. Even the bravest person finds it difficult to stand up in a group of people to complain, so if you do not want to do it in person, write a letter. Stick to the facts and keep a copy of what you write. At this stage you should give any receipt numbers, but you should not need to give receipts or other papers to prove you bought the article. If you are not satisfied with the answer you get, or if you do not get a reply, write to the managing director of the firm, shop, or organization. Be sure to keep copies of your own letters and any you receive. If your complaint is a just one, the shopkeeper may offer to replace or repair the faulty article. You may find this an attractive solution. In certain cases you may have the right to refuse the goods and ask for your money back, but this is only when you have hardly used the goods and have acted at once. Even when you cannot refuse the goods you may be able to get some money back as well. And if you have suffered some special loss, if for example a new washing machine tears your clothes, you might receive money to replace them. If the shopkeeper offers you a credit note to be used to buy goods in the same shops but you would rather have money, say so. If you accept a credit note remember that later you will not be able to ask for your money. If the shopkeeper refuses to give you money, ask for advice from your Citizens' Advice Bureau before you accept a credit note. In some cases the shopkeeper does not have to give you your money back—if, for example, he changes an article simply because you don't like it or it does not fit. He does not have to take back the goods in these circumstances.

单选题The walls are made of hollow concrete blocks.

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：如果该句是正确信息，请选择A；如果该句是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 Marriage Advertisements in India Every Sunday morning millions of Indians settle down with a cup of tea and special weekend issues of their newspapers, just as Americans do. But here, with the marriage season approaching, many of them quickly to a Sunday feature that is particularly Indian-the-columns of marriage advertisements in which young people look for husbands and wives. This is relatively modern change in the age-old custom of the arranged marriage. The thousands of advertisements published each week increasingly reflect social changes that coming to this traditional society. For example, although women are still described in terms of appearance, or skill in "the wifely arts", information about her earning power is entering more and more of the advertisements. This reflects the arrival in India of the working wife. Divorce, which used to be almost unheard of in India, is sometimes now mentioned in the advertisements as in the case of a woman whose advertisement in New Delhi newspaper explained that had been "the innocent party" when her marriage broke up. Because the custom of the dowry ( marriage payment) is now illegal, some advertisements say "no dowry" or "simple marriage", which means the same thing. However, the fathers of many bridegrooms still require it. In a land where light skin is often regarded as socially preferable, many also require that a woman have a "wheat-color" complexion or that a man be "tall, fair and handsome". Advertisements are placed and eagerly read by a wide range of people in the upper classes, mostly in cities. Many of them receive dozens of answers. "There's nothing embarrassing about it," explained a Calcutta businessman advertising a son-in-law. "It's just another way of broadening the contacts and increasing the possibility of doing the contacts and increasing the possibilities of doing the best one for one's daughter. " Because of high unemployment and a generally poor standard of living here, one of the best attractions a marriage advertisement can offer is a permit to live abroad, especially in Canada or the United States. A person who has one can get what he wants. One recent Sunday in Madras, for example, a Punjabi engineer living in San Francisco advertised for a "beautiful slim bride with lovely features knowing music and dance". And a man whose advertisement said that he held an American immigration permit was able to say, only girls from rich, well-connected families need apply.

单选题All the flats in the building had the same layout .

单选题I don't quite {{U}}follow{{/U}} what she is saying. A. observe B. understand C. explain D. describe

单选题According to some biologists, the instinct to care for the young is perhaps the most interesting characteristic of animals.

单选题You will be meeting her presently.A. shortlyB. currentlyC. latelyD. probably

单选题She came across three children sleeping under a bridge.

单选题Egypt felled by Famine Even ancient Egypt's mighty pyramid builders were powerless in the face of the famine that helped bring down their civilization around 2180 BC．Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blame-and the same or worse could happen today. The ancient Egyptians depended on the Nile's annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have been diminished these floods. Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablise the soil. When rain did fail it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment from the White Nile. The Blue Nile mud has a different isotope signature from that of the White Nile. So by analyzing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river. Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4500 to 4200 years ago, immediately predates the fall of the Egypt's Old Kingdom. The weakened waters would have been catastrophic for the Egyptians. "Changes that affect food supply don't have to be very large to have a ripple effect in societies, " says Bill Ryan of the Lamont Doherty Earth Observatory in New York. Similar events today could be even more devastating, says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington, D. C. "anything humans do to shift the climate belts would have an even worse effect along the Nile system today because the populations have increased dramatically. /

单选题A person’s wealth is often in Uinverse/U proportion to their happiness.

单选题In the situation comedy, a traditional format for television shows, the same characters appear repeatedly in humorous episodes.

单选题As a politician, he knows how to manipulate public opinion.

单选题Will you please Ucall/U my husband as soon as possible?

单选题I will not accept his suggestion.A. believeB. understandC. explainD. follow

单选题We shall take the treasure to a {{U}}safe{{/U}} place.