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Television commercial have been under constant scrutiny for the last few years.
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People read it for information.（）
Passage Four The American public’s obsession with dieting has led to one of the most dangeroushealth misconceptions of all times. Many television ads, movies, magazine articles, anddiet-food product labels would have consumers believe that carbohydrates (碳水化合物) are bad for the human body and that those who eat them will quickly becomeoverweight. We are advised to avoid foods such as potatoes, rice and white bread andopt for meats and vegetables instead. Some companies promote this idea to encourageconsumers to buy their "carb-free" food products. But the truth is, the human bodyneeds carbohydrates to function properly, and a body that relies on carbohydrates but isexhausted of thisdietary element is not in good shape after all. Most foods that we consume on a daily basis like potatoes and rice are loaded withcarbohydrates. Contrary to popular belief, carbohydrates have many health benefitssome fight diseases such as high blood pressure and heart disease, and others help toprevent cancer and stroke. Cutting these foods out of your diet may deprive your bodyof the many health benefits of carbohydrates. One of the best benefits of carbohydrates is their ability to help to maintain the health of our organs, tissues, and cells. Scientific studies have shown that one type of carbohydrate called fiber reduces the risk of heart disease. Carbohydrates also contain antioxidants (抗氧化剂) , which protect the body’s cells from harmful particles with thepotential to cause cancer. This does not mean that the human body can survive on a diet composed entirely ofcarbohydrates. We also need certain percentages of proteins and fats to maintain healthybodies. But carbohydrates certainly should not be avoided altogether. In fact, the foodpyramid, the recommended basis of a healthy diet, shows that a person should consumesix to eleven servings of breads and grains, as well as three to four servings each offruits and vegetables - all carbohydrate-containing foods. It is easy to see why cuttingcarbohydrates out of a person’s diet is not a good idea. The only way to know what is truly healthy for your own body is to talk to a nutritionist or dietician, who can help you choose foods that are right for you as well asguide you toward a proper exercise program forweight loss, or muscle gain. Theseprofessionals will never tell you to cut out carbohydrates entirely! The bottom line:listen to the experts, not the advertisers! As is used in Paragraph l, the word "exhausted" most possibly means______
The changing profile of a city in the United States is apparent in the shifting definitions used by the United States Bureau of the Census. In 1870 the census officially distinguished the nation’s "urban" from its "rural" population for the first time. "Urban population" was defined as persons living in towns of 8,000 inhabitants or more. But after 1900 it meant persons living in incorporated places having 2,500 or more inhabitants. Then, in 1950 the Census Bureau radically changed its definition of "urban" to, take account of the new vagueness of city boundaries. In addition to persons living in incorporated units of 2,500 or more, the census now included those who lived in unincorporated units of that size, and also all persons living in the densely settled urban fringe, including both incorporated and unincorporated areas located around cities of 50, 000 inhabitants or more. Each such unit, conceived as an integrated economic and social unit with a large population nucleus, was named a Standard Metropolitan Statistical Area (SMSA). Each SMSA would contain at least one central city with 50,000 inhabitants or more or two cities having shared boundaries and constituting, for general economic and social purposes, a single community with a combined population of at least 50,000, the smaller of which must have a population of at least 15,000. Such an area included the country in which the central city is located, and adjacent countries that are found to be metropolitan in character and economically and socially integrated with the country of the central city. By 1970, about two-thirds of the population of the United States was living in these urbanized areas, and of that figure more than half were living outside the central cities. While the Census Bureau and the United States government used the term SMSA (by 1969 there were 233 of them), social scientists were also using new terms to describe the elusive, vaguely defined areas reaching out from what used to be simple "towns" and "cities". A host of terms came into use: "metropolitan regions", "polynucleated population groups", "conurbations", "metropolitan clusters", "megalopolises", and so on. Prior to 1900, how many inhabitants would a town have to have before being defined as urban
案例分析题Temperatures (温度) around the world are going up year after year. A report shows that the ten warmest years since 1860 all happened after 1987. Of those ten, nine happened after 1990. The report also says the increase (上升) in temperature over the past 25 years is greater than that over the past 1,000 years. Ken Davidson, a world-famous scientist, agrees with the scientific findings that global (全球的) warming is happening just because of what people do on the earth. He says one of the most important reasons for the higher temperatures is the fact that cities are getting bigger and bigger. Studies show that cities are hotter than other places. Reports show that many places around the world have had unusual weather in the past few years because of global warming. Most of Asia, for example, is warmer than before, and in India hundreds of people have even died from the hot and dry weather each year. Parts of Africa have often had unusually heavy rains while other parts of Africa have had unusually dry weather. In parts of Europe, more than 100 people died from heavy rainfall in September 2002. Yet large parts of North and South America had very dry weather in the same year. The ten warmest years since 1860 happened after（）
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