单选题It is implied that the main difference between "S" and "R" rats is their ______.

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单选题 {{I}}Questions 19 to 22 are based on the passage you have just heard.{{/I}}

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单选题I don't know ______ you can recognize here from here, but the girl reading the newspaper is Jane. A. that B. what C. if D. which

单选题 {{B}} Slater{{/B}} Swine influenza (also called swine flu, hog flu, and pig flu) refers to influenza caused by those strains of influenza virus, called swine influenza virus (SIV), that usually infect pigs. Swine influenza is common in pigs in the Midwestern United States (and occasionally in other states), Mexico, Canada, South America, Europe (including the United Kingdom, Sweden, and Italy), Kenya, Mainland China, Taiwan, Japan and other parts of eastern Asia.{{B}} Mike Smith{{/B}} Transmission of swine influenza virus from pigs to humans is not common and properly cooked pork poses no risk of infection. When transmission results in influenza in a human, it is called zoonotic swine flu. People who work with pigs, especially people with intense exposures, are at risk of catching swine flu. Rarely, these strains of swine flu can pass from human to human. In humans, the symptoms of swine flu are similar to those of influenza and of influenza-like illness in general, namely chills, fever, sore throat, muscle pains, severe headache, coughing, weakness and general discomfort.{{B}} Baker{{/B}} The 2009 flu outbreak in humans, known as "swine flu", is due to a new strain of influenza A virus subtype H1N1 that contained genes most closely related to swine influenza. The origin of this new strain is unknown, however, and the World Organization for Animal Health (OIE) reports that this strain has not been isolated in pigs. This strain can be transmitted from human to human, and causes the normal symptoms of influenza.{{B}} Bob David{{/B}} If a person becomes sick with swine flu, antiviral drugs can make the illness milder and make the patient feel better faster. They may also prevent serious flu complications. For treatment, antiviral drugs work best if started soon after getting sic (within 2 days of symptoms). Beside antivirals, palliative care, at home or in hospital, focuses on controlling fevers and maintaining fluid balance. However, the majority of people infected with the virus make a full recovery without requiring medical attention or antiviral drugs.{{B}} Tom Brown{{/B}} In the US, on April 27, 2009, the FDA issued Emergency Use Authorizations to make available Relenza and Tamiflu antiviral drugs to treat the swine influenza virus in cases for which they are currently unapproved. The agency issued these EUAs to allow treatment of patients younger than the current approval allows and to allow the widespread distribution of the drugs, including by non-licensed volunteers.{{I}} Now match each of the persons to the appropriate statement. Note: there are two extra statements.{{/I}}{{B}} Statements{{/B}} A. Swine influenza is common in pigs all over United States, Mexico, Canada, South Africa, Europe, Kenya, Mainland China, Taiwan, Japan and other parts of eastern Asia. B. It is risky for people intensively exposed to the work with pigs. C. The origin of the new strain of influenza A virus subtype H1N1 is unknown yet. D. Transmission of swine influenza virus from pigs to humans is very common. E. Some drugs are still unapproved to treat the swine influenza virus. F. Antiviral drugs work best to the patients within 2 days of symptoms. G. A brief introduction of Swine influenza.

单选题The best title for the text would be ______.

单选题 Most young people enjoy physical activities, walking, cycling, football, or mountaineering. These who have a passion{{U}} (26) {{/U}}climbing high and difficult mountains are often{{U}} (27) {{/U}}with astonishment. Why are men and women{{U}} (28) {{/U}}to suffer cold and hardship, and to{{U}} (29) {{/U}}on high mountains? This astonishment is caused, probably, by the difference between mountaineering and other forms of activities{{U}} (30) {{/U}}which men give their leisure. There are no man-made rules, as there are for{{U}} (31) {{/U}}games as golf and football. There are, of course, rules of different kinds which it would be dangerous to{{U}} (32) {{/U}}, but it is this freedom from man-made rules{{U}} (33) {{/U}}makes mountaineering attractive to many people. Those who climb mountains are free to use their own{{U}} (34) {{/U}}. If we{{U}} (35) {{/U}}mountaineering with other more familiar sports, we might think that one big difference is {{U}}(36) {{/U}}mountaineering is not a "team work". However, it is only our misunderstanding. There are, in fact, no "matches" {{U}}(37) {{/U}}"teams" of climbers, but when climbers are on a rock face linked by a rope on which their lives may{{U}} (38) {{/U}}, obviously, there is teamwork. A mountain climber knows that he may have to fight with natural{{U}} (39) {{/U}}that are stronger and more powerful than man. His sport requires high mental and{{U}} (40) {{/U}}qualities. A mountain climber{{U}} (41) {{/U}}to improve on skill year after year. A skier is probably past his best by the age of thirty, and most international tennis champions{{U}} (42) {{/U}}in their early twenties. But it is not{{U}} (43) {{/U}}for men of fifty or sixty to climb the highest mountains in the Alps. They may take more{{U}} (44) {{/U}}than younger men, but they probably climb with more skill and less{{U}} (45) {{/U}}of effort, and they certainly experience equal enjoyment.

单选题 Text The conception of poverty and what to (26) about it have changed over the decades. Under Social Darwinism the lazy and the (27) were supposed to be at the bottom of the economic ladder as a result of the "law of (28) of the fittest". Society was (29) as a network of self-sufficient families which provided for their own. (30) persons outside a household (orphans, the (31) elderly,and the crippled) were provided outdoor relief grudgingly and as a temporary expedient. Although it was (32) that "the poor will always be with us", the individual was expected to improve himself (33) acts of his own will. Charity was thought to be the (34) of idleness. By keeping wages low, labourers would be (35) to work harder. At about the turn of the century, the beginning of concern about natural (36) brought uneasiness about the possible spread of beggary. There was a potentially dangerous class in (37) of disease and disorder. The "poor" were (38) as different from "paupers". Paupers were individuals well (39) to being on the low end of the socioeconomic (40) . Without shame or bitterness, they would not seek independence and a " (41) " life. For the mountaineers, the subsistence dwellers, and some slum dwellers, the lack of wealth, (42) has been argued,reflects a preference not to pay the psychological costs of the struggle for the riches or of adopting the middle-class work ethic of surviving. In (43) ,the worthy poor struggled to (44) their lot against circumstances beyond their control: low wages, sickness, industrial (45) , widowhood and so on.

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单选题Whataretheytalkingabout?

单选题According to the writer, Adam Smith's mistake was in believing that the division of labor______.

单选题Wheredoestheconversationtakeplace?

单选题The word "wound"(Line 2, Para. 1)indicates that

单选题What role does the Internet play in journalism according to paragraph 1?

单选题Disposing (处理) of waste has been a problem since humans started producing it. As more and more people choose to live close together in cities, the waste-disposal problem becomes increasingly difficult. During the eighteenth century, it was usual for several neighboring towns to get together to select a faraway spot as a dumpsite. Residents or trash haulers (垃圾托运者) would transport household rubbish, rotted wood, and old possessions to the site. Periodically (定期的) some of the trash was burned and the rest was buried. The unpleasant sights and smells caused no problem because nobody lived close by. Factories, mills, and other industrial sites also had waste to be disposed of. Those located on rivers often just dumped the unwanted remains into the water. Others built huge burners with chimneys to deal with the problem. Several facts make these choices unacceptable to modem society. The first problem is space. Dumps, which are now called landfills, are most needed in heavily populated areas. Such areas rarely have empty land suitable for this purpose. Property is either too expensive or too close to residential (住宅区的)neighborhoods Long-distance trash hauling has been a common practice, but once farm areas are refusing to accept rubbish from elsewhere, cheap land within trucking distance of major city areas is almost nonexistent. Awareness of pollution dangers has resulted in more strict rules of waste disposal. Pollution of rivers, ground water, land and air is a price people can no longer pay to get rid of waste. The amount of waste, however, continues to grow. Recycling efforts have become commonplace in recent years, and many towns require their people to take part. Even the most efficient recycling programs, however, can hope to deal with only about 50 percent of a city's reusable waste.

单选题{{I}} Questions 18-21 are based on the following conversation. You now have 20 seconds to read the questions 18-21.{{/I}}