单选题They have the {{U}}capability{{/U}} to destroy the enemy in a few days. A.possibility B.necessity C.ability D.probability

单选题They didn’t (realize) how serious the problem was．

单选题 Irradiating Food Irradiating fruits, vegetables, pork and chicken to kill insects and bacteria has been approved by the Food and Drug Administration over the past decade or so. Irradiation of other meats, such as beef and lamb, is being reviewed. Federal approval does not require that industry adopt the process, and few food processors presently offer irradiated products. Market studies have shown that many consumers are afraid that eating irradiated foods may cause cancer, despite scientific studies that prove the safety of treated foods. Some people argue that more severe government inspection, higher food-safety standards, and more careful preparation practices by consumers are all that is needed to ensure that food is safe. Consequently, companies currently see no need to spend millions of dollars outfitting processing plants with the equipment necessary for a process that very few shoppers are in favor of. All supermarkets that sell irradiated food must label the food either directly on the packaging, or, in the case of bulk items like fruits and vegetables, by placing a sign nearby. There is no requirement for the labeling of irradiated food served by chain restaurants or hospitals that buy directly from distributors, nor any regulations for products that contain irradiated ingredients. Presently, the FDA allows food to be treated with three types of radiation—gamma rays, high-energy electrons, and X rays—and sets limits on doses, depending on the type of food. The principle is that the dose to be used for a certain type of food should not exceed the amount that is sufficient to kill most harmful insects and bacteria present in it. Different types of food, because of their molecular compositions, may require different doses of radiation.

单选题Immigration and Problems Hundreds of thousands of people supporting immigration rights in the US filled streets all over America in early 2006. Many held signs and American flags and asked to be treated as citizens—not criminals. Many of these supported legislation from Senator John McCain that would open a path to citizenship to immigrants who were already in the country illegally. Proposed legislation from other politicians called for stricter measures - including rounding up undocumented immigrants and sending them back to their home countries. Canadian officials say that immigration applications continue to rise. Some want to keep the doors open. They need the labor. About 400,000 immigrants were allowed into the country in 2005, according to the Canadian Government statistics. However, all this growth means that cities need to adapt. Newcomers don"t always make a smooth transition into jobs for which they are skilled. So industries are using mentoring programs to help new immigrants find proper jobs. With the large numbers of undocumented African immigrants arriving in the Canary Islands and showing no sign of abating, the Spanish Government has decided to get tough. There will be no more mass amnesties for illegal, and anyone coming to Spain without permission will be sent back, the government has announced. About 23,000 migrants landed on the islands in 2006, and riots have erupted in some crowded reception centers. This has promoted local authorities to appeal to the United Nations for help. France"s new immigration and integration law gives the government new powers to encourage high-skilled migration. It takes effect in 2007. The new law authorizes the government to identify particular professions where France has a talent shortage. Then the government will help these identified employers find immigrant workers with needed skills or qualifications. The selected foreign employees will be granted "skills and talents" visas, valid for three years. But some concern that it"ll cause brain drain in developing countries.

单选题To flame up his boss, Dick had to make up evidence. A. collect B. disclose C. invent D. generate

单选题Mr. Johnson evidently regarded this as a great joke. A. readily B. casually C. obviously D. simply

单选题She is the only survivor of the air crash.A. aloneB. uniqueC. singleD. sole

单选题 El Nino While some forecasting methods had limited success predicting the 1997 El Nino a few months in advance, the Columbia University researchers say their method can predict large El Nino events up to two years in advance. That would be good news for governments, farmers and others seeking to plan for the droughts and heavy rainfall that El Nino can produce in various parts of the world. Using a computer the researchers matched sea-surface temperatures to later El Nino occurrences between 1980 and 2000 and were then able to anticipate El Nino events dating back to 1857, using prior sea-surface temperatures. The results were reported in the latest issue of the journal Nature. The researchers say their method is not perfect, but Bryan C. Weare, a meteorologist at the University of California, Davis, who was not involved in the work, said it "suggests El Nino is indeed predictable." "This will probably convince others to search around more for even better methods." said Weare. He added that the new method "makes it possible to predict El Nino at long lead times." Other models also use sea-surface temperatures, but they have not looked as far back because they need other data, which is only available for recent decades, Weare said. The ability to predict the warming and cooling of the Pacific is of immense importance. The 1997 El Nino, for example, caused an estimated $20 billion in damage worldwide, offset by beneficial effects in other areas, said David Anderson, of the European Centre for Medium. Range Weather Forecasts in Reading England. The 1877 El Nino, meanwhile, coincided with a failure of the Indian monsoon and a famine that killed perhaps 40 million in India and China prompting the development of seasonal forecasting, Anderson said. When El Nino hit in 1991 and 1997, 200 million people were affected by flooding in China alone, according to a 2002 United Nations report. While predicting smaller El Nino events remains tricky, the ability to predict larger ones should be increased to at least a year if the new method is confirmed. El Nino tends to develop between April and June and reaches its peak between December and February. The warming tends to last between 9 and 12 months and occurs every two to seven years. The new forecasting method does not predict any major El Nino events in the next two years, although a weak warming toward the end of this year is possible.

单选题China to Help Europe Develop GPS Rival China is going to contribute to a new global satellite navigation system being developed by European nations. The Galileo satellite system will 1 a more accurate civilian alternative to the Global Positioning System (GPS), operated by the US military. China will provide 230m Euros in funding and will 2 with technical, manufacturing and market development. A new center that will coordinate co-operation will be set 3 at Beijing University. China has a substantial satellite launch industry and could potentially help 4 the Galileo satellites. The US has claimed that Galileo could interfere with the US with 5 to downgrade the GPS service during military conflicts. European officials say this is unfounded (无根据的) and counter that US opposition is caused by the commercial challenge Galileo would present to GPS. Galileo will be 6 to within a meter, while the civilian GPS service is accurate to around 10 meters. The Galileo satellite constellation (卫星集群) will consist of 27 operational and three reserve satellites 7 the Earth at an altitude of 23,600 kin. The satellites will be strung along three medium-Earth orbits at 56 degrees inclination (倾斜) 8 the equator (赤道) and will provide global coverage. The system should be 9 by 2008 and the entire project is expected to cost around 3.2 billion Euros. The European Commission has said Galileo will 10 be used for transportation technology, scientific research, land management and disaster monitoring. Galileo will provide two 11 , a standard civilian one and an encrypted (把……编码), wide-band signal called the Public Regulated Service (PRS). This second signal is 12 to endure localized jamming and will be used by police and military services in Europe. The first Galileo satellite is 13 to launch late in 2004. Clocks on board the satellites will be synchronized (同步) through 20 ground sensors (传感器) stations, two command centers and 15 uplink (上传) stations. Receivers on the ground will use time signals from the satellites to precisely calculate their 14 . A "search and rescue" function will also let distress signals be 15 through the constellation of satellites.

单选题It seems （incredible） that he had been there a week already.

单选题In 1996, Arthur C. Clarke predicted that

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。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；如果该句的信息文章中没有提及，请选择C。 Imagine eating everything delicious your want--with none of the fat. That would be great, wouldn't it? New "fake fat" products appeared on store shelves in the United States recently, but not everyone is happy about it. Makers of the products, which contain a compound called olestra, say food manufacturers can now eliminate fat from certain foods. Critics, however, say the new compound can rob the body of essential vitamins and nutrients(营养物) and can also cause unpleasant side effects in some people. So it's up to consumers to decide whether the new fatfree products taste good enough to keep eating. Chemists discovered olestra in the late 1960s, when they were searching for a fat that could be digested by infants more easily. Instead of finding the desired fat, the researchers created a fat the can't be digested at all. Normally, special chemicals in the intestines(肠) "grab" molecules of regular fat and break them down so they can be used by the body. A molecule of regular fat is made up of three molecules of substances called fatty acids. The fatty acids are absorbed by the intestines and bring with them the essential vitamins A, D, E, and K. When fat molecules are present in the intestines with any of those vitamins, the vitamins attach to the molecules and are carried into the bloodstream. Olestra, which is made from six to eight molecules of fatty acids, is too large for the intestines to absorb. It just slides through the intestines without being broken down. Manufacturers say it's that ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular fat without any bad effects on the body. But critics say olestra can prevent vitamins A, D, E, and K from being absorbed. It can also prevent the absorption of carotenoids(类胡萝卜素), compounds that may reduce the risk of cancer, heart disease, etc. Manufacturers are adding vitamins A, D, E, and K as well as carotenoids to their products now. Even so, some nutritionists are still concerned that people might eat unlimited amounts of food made with the fat substitute without worrying about how many calories they are consuming.

单选题The manager gave us a brief introduction about this company.A. shortB. detailedC. formalD. long

单选题Once thought doomed to extinction, southern sea otters are now {{U}}stringently{{/U}} protected through the efforts of naturalist groups.

单选题Don't just stand by. Can't you lend a hand?A. loanB. offerC. helpD. understand

单选题 Spam Would you like to lose weight fast? Would you like to make $5,000 a month for your home? Yes or no, you are more likely to find such unsolicited offers flooding your E-mall inbox these days than ever before, along with a free trial for professional teeth whitening and a low-rate mortgage. Such E-mail, best known by its pejorative appellation, spam, has been annoying Internet users for years. But in the last three months, Spam has been spiked. Spare-watchers attribute the escalation to a combination of factors. In a slumping economy, companies going out of business may be selling their lists of customer E-mail addresses to pay off creditors. Mailing tactics have also improved. Online marketers have always selected addresses from Web sites, but with the growth of sites like eBay, the online auction service where thousands of people post their E-mail addresses, automated sweeps of the World Wide Web for E-mail addresses are obtaining more results. Many now use "dictionary attacks," in which a computer automatically matches combinations of thousands of common words and names with long lists of large domain names (amyfritz@yahoo.com, amyfritz@hotmail.com and so on) sends E-mail messages to all of them, much like telemarketers dialing numbers in sequence. As a result, even people who have made efforts to keep their E-mail addresses private will find their mailboxes stuffed with suggestions on how to make money fast or reduce their debts simply and easily. Marketers worry that people who feel constantly assaulted by junk E-mail are less likely to trust any commercial communication by E-mails, even from businesses they might otherwise be happy to hear from, like a retailer alerting them to a sale on an item they are, interested in. To shield themselves from junk E-mail, many Internet users have become increasingly wary of divulging their addresses. Some mainstream marketers are already beginning to see the effects of resistance to junk E-mail. Only a year ago, advertisers were raving about the response rates to targeted E-mail, which could reach as high as 20 percent. But that number is falling fast. Still, critics say some online retailers with well-known brand names also contribute to the problem by automatically adding customers to an E-mail list unless they specifically ask to be kept off. United Airlines, Amazon. com and Martha Stewart. corn, among others, all require customers to uncheck the "yes" box on their Web site that asks if they would like to receive E-mail from them-or, in some cases, an unspecified list of advertising "partners" . Some times, it is not entirely clear that there is a choice involved. The difficulty of defining Spam is one reason-efforts to pass federal legislation to stop it have foundered. Critics have compared junk E-mail to unsolicited faxes, which are illegal under a law that was passed when receiving a fax was quite expensive.

单选题{{B}}第三篇{{/B}} {{B}} Kite{{/B}} Kite flying is the sport of sending up into the air, by means of the wind, a light frame covered with paper, plastic or doth. The frame can be one of many different shapes and is attached to a long string held in the hand or wound on a drum. Kites have a long history practical application and many different types of kite have been developed to serve various purposes. The ancient Chinese used bird-kites to carry ropes across rivers and valleys. The current folding kite which will dive excitingly is an improved type of such a kite. With its long flat body and single pair of bird like wings, it looks just like a large bird in the air. The modern version is usually made of tissue paper rather than the traditional silk. Man-lifting kites were developed in ancient times, again by the Chinese, for getting information from walled cities and army camps. In fact, as recently as World War Ⅱ, German U-boats flew kites from their towers to lift people into the air to watch the land. These kites, which are no longer in existence, were made of lightweight cloth. They were much larger and stronger than the Chinese ones. Their design, however, was simply that of the cutter kite. Smaller in size, this type of kite is still very popular as a toy for children, being easy to make with a diamond-shaped frame, no wings and brown-paper covering. Box kites are another type of kite found in toy shops today. The first box kite, named for its box-like body, was developed in the 19th century to test theories of flight and this type of cotton-covered kite greatly assisted the success of early airplanes. These kites are the ancestors of a heavier version of the box kite, called the double box kite, which consists of two main sections, placed side by side. Developed for the peacetime purpose of fishing in strong sea wind, it is the only modern kite described which has practical value. A long-lasting plastic material has to be used for this kite, which carries fishing lines.

单选题I notified him that my address had changed.

单选题Traffic and home heating were considered to be the biggest sources of PAHs for the subjects in the research.

单选题The little girl trembled when she saw a big dog.A. ranB. criedC. shookD. wept