【文章內容簡介】 stry are astonishing. But so, too, are the possibilities for abuse. Such machines could determine whether a woman is ovulating(排卵 )， without a physical exam— or even her knowledge. One of the traditional protectors of American liberty is that it has been impossible to search everyone. That39。s getting not to be the case. Artificial biosensors created at Auburn work totally differently from anything ever seen before. Aromascan, for example， is a desktop machine based on a back of chips sensitive to specific chemicals that evaporate into the air. As air is sucked into the machine, chemicals pass over the sensor surfaces and produce changes in the electrical current flowing through them. Those current changes are logged into a puter that sorts out odors based on their electrical signatures. Myers says they expect to load a single fingernail173。size chip with thousands of odor receptors (感受器 ), enough to create a sensor that39。s nearly as sensitive as a dog39。s nose. 25． Which of the following is within the capacity of the artificial nose being developed? A． Performing physical examinations. B． Locating places which attract terrorists. C． Detecting drugs and water contamination. D． Monitoring food processing. 解析： 細節(jié)題。本題考查哪一個選項是人造鼻子的功能。第四段最后一句列舉了人造鼻子的功能，其中包括 “Police could detect drugs ， ... while food inspectors could easily test food and water for contamination.” 所以 C項 “ 探測毒品與水質污染 ” 是正確答案。 答案： C 26． A potential problem which might be caused by the use of an artificial nose is ________. A． negligence of public safety B． an abuse of personal freedom C． a hazard to physical health D． a threat to individual privacy 解析： 推理題 。本題要求明確使用人造鼻子會帶來什么問題。人造鼻子帶來的問題在第五段和第六段中作了表述：人造鼻子在不作體檢，甚至在對方完全不知道的情況下可以測出女子是否在排卵。這種情況顯然是人們的隱私，作者還指出這導致的后果是不可能不探察別人的事情，所以 D項是正確答案。 答案： D 27． To produce artificial noses for practical use, it is essential ________. A． to develop microchips with thousands of order receptors B． to invent chips sensitive to various chemicals C． to design a puter program to sort out smells D． to find chemicals that can alter the electrical current passing through 解析： 細節(jié)題。本題要求了解怎樣能夠將人造鼻子投入到實際應用。文章一開始提到Myers的主要任務就是研究人造鼻子，在最后一段又說明如果把芯片裝上成 千上萬個氣味的接收器，就能研制出像狗鼻子一樣靈敏的人造鼻子，這樣這種鼻子才可以具有前文所說的一些功能并有實際用途，所以 A項 “ 研制出裝有成千上萬個氣味接收器的芯片 ” 是正確答案。 答案： A C A few cups of green tea each day may help prevent heart disease， Greek researchers said on Wednesday. A study published in the European Journal of Cardiovascular (心血管的 ) Prevention showed further evidence of the potential health benefits from tea already linked to a reduced risk of a range of cancers and other conditions. The study showed that green tea improves blood flow and the ability of arteries (動脈 ) to relax， said Charalambos Vlachopoulos， an expert at the Athens Medical School in Greece who worked on the study. Other studies have shown that black tea also has benefits for cardiovascular health. The Greek team said they believed green tea might be even better because it had higher quantities of beneficial substances called flavonoids (類黃酮 )— some of which are lost in the oxidation (氧化 ) process that black tea undergoes. Flavonoids are also found in cocoa， tomatoes and grapes. “A couple of cups a day would probably be good for people， ” Vlachopoulos said. “This is the first study to show these effects for green tea.” The researchers gave 14 healthy volunteers either green tea， coffee or hot water and then measured the function of endothelial cells (內皮細胞 )． These cells help relax arteries and ease blood flow. “What is important is these effects are evident within 30 minutes， ” Vlachopoulos said. The measurements taken 30,90 and 120 minutes following consumption showed an almost immediate benefit among people who had drunk green tea， he said. While the researchers looked only at a short173。term effect， Vlachopoulos said the team39。s studies suggest the protection is long173。lasting. “Green tea is consumed less in the Western world than black tea ， but it could be more beneficial， ”he said. 28． What would be the best title for the passage? A． Benefits from black tea B． Different kinds of tea C． Green tea protects against heart disease D． Green tea reduces the risk of cancer 解析： 歸納標題題。本文主要介紹了每天喝幾杯綠茶有助于預防心臟病。第一段是主題段。 答案： C 29． According to the study， green tea can do the following EXCEPT ________. A． improve blood flow B． benefit cardiovascular health C． help relax arteries D． increase the oxidation rate of flavonoids 解析： 細節(jié)理解題。由第二段的 green tea improves blood flow and the ability of arteries to relax 以及第三段的 black tea also has benefits for cardiovascular health可知，綠茶能夠促進血液流動，并能增強動脈疏通能力，對心血管健康也有好處。 D項與文章第四段內容不相符。 答案： D 30． Which of the following statements is TRUE? A． Green tea is better than black tea because it has been processed. B． Green tea contains more flavonoids than black tea. C． Vlachopoulos39。s study is based on many years39。 research. D． Vlachopoulos39。s study is the first to show green tea39。s benefits. 解析： 細節(jié)判斷題。由第四段可知，研究人員認為綠茶的心血管保健功效可能會更強，因為綠茶中所含的一種名叫 “ 類黃酮 ” 的有益物質較多，而這種物質在紅茶氧化過程中會部分流失。 答案： B 31． We can learn from the passage that ________. A． 14 volunteers with heart disease joined in the experiment B． it takes an hour for green tea to take effect C． green tea has a long173。lasting effect according to Vlachopoulos D． Westerners prefer green tea to black tea 解析： 細節(jié)判斷題。 由倒數第二段可知，盡管研究人員只探究了綠茶的短期功效，但維拉科珀羅斯稱，他們的研究表明，這種保護功效是長期的。 答案： C D I was no more than 18 years old during World War Ⅱ.Two days before the war in Britain began， a rule was issued that everyone had to cover up their windows at night with black material. This was to make it difficult for German bombers to find their target in the dark. The street lamps were turned off and often people bumped into one another. Traffic accidents were mon because car headlights had to be blacked out， and deaths fr