Smart Window　　It took us a long time to figure out what a window really is, says Claes Granqvist.Hes a professor of solid-state physics at Uppsala University in Sweden3.Its contact with the outside world.You have to have visual contact with the surrounding world to feel well. So，windows and natural light are important for improving the way people feel when theyre stuck indoors.　　their air conditioners.Producing blasts of cold air，which can feel so refreshing，actually suck up enormous amounts of electricity in buildings around the world.　　Electrochromic windows use electricity to change color.For example，a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery.Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed，that is，when the amount of voltage is decreased，the window darkens until its completely dark after all electricity is taken away.So applying a voltage determines whether the window looks clear or dark.　　注釋：　　anywhere in between witha flip of a switch：就在開或關(guān)的一霎那。　　練習(xí)：　　as described in the first two paragraphs?　　B Windows help to save energy by letting light in.　　D Windows enable people to have contact with the outside world.　　A In the cold winter.　　C When air conditioners are turned on.　　What are smart windows，according to Paragraph 4?　　B Windows that are glazed.　　D Windows that have many layers.　　A Electricity.　　C A battery.　　What will he the benefit if the research on smart windows turns out to be successful，according to the last paragraph?　　B Windows can be as large as you want.　　D They are less expensive than traditional windows　　答案與題解：　　 A 第一段告訴我們窗戶因?yàn)樽岅柟膺M(jìn)入房間，并且為房間提供熱源，所以節(jié)約了能源。第二段說，窗戶使人們能接觸外部世界。所以B、C和D都說明了窗戶的重要性。第一段最后一句說，研究者正在實(shí)驗(yàn)?zāi)茏尨皯糇儞Q亮度，但并沒有說已經(jīng)實(shí)驗(yàn)成功，所以A是錯誤的說法，是正確選擇。　　C 第四段告訴我們，多年來，科學(xué)家已研究出多種通過窗戶節(jié)能的辦法，而smart windows 使用的技術(shù)使窗戶能變換顏色。所以C是正確選擇。　　C 短文最后一段的第五句提供了答案。

　　Smart Window　　It took us a long time to figure out what a window really is, says Claes Granqvist.Hes a professor of solid-state physics at Uppsala University in Sweden3.Its contact with the outside world.You have to have visual contact with the surrounding world to feel well. So，windows and natural light are important for improving the way people feel when theyre stuck indoors.　　their air conditioners.Producing blasts of cold air，which can feel so refreshing，actually suck up enormous amounts of electricity in buildings around the world.　　Electrochromic windows use electricity to change color.For example，a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery.Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed，that is，when the amount of voltage is decreased，the window darkens until its completely dark after all electricity is taken away.So applying a voltage determines whether the window looks clear or dark.　　注釋：　　anywhere in between witha flip of a switch：就在開或關(guān)的一霎那。　　練習(xí)：　　as described in the first two paragraphs?　　B Windows help to save energy by letting light in.　　D Windows enable people to have contact with the outside world.　　A In the cold winter.　　C When air conditioners are turned on.　　What are smart windows，according to Paragraph 4?　　B Windows that are glazed.　　D Windows that have many layers.　　A Electricity.　　C A battery.　　What will he the benefit if the research on smart windows turns out to be successful，according to the last paragraph?　　B Windows can be as large as you want.　　D They are less expensive than traditional windows　　答案與題解：　　 A 第一段告訴我們窗戶因?yàn)樽岅柟膺M(jìn)入房間，并且為房間提供熱源，所以節(jié)約了能源。第二段說，窗戶使人們能接觸外部世界。所以B、C和D都說明了窗戶的重要性。第一段最后一句說，研究者正在實(shí)驗(yàn)?zāi)茏尨皯糇儞Q亮度，但并沒有說已經(jīng)實(shí)驗(yàn)成功，所以A是錯誤的說法，是正確選擇。　　C 第四段告訴我們，多年來，科學(xué)家已研究出多種通過窗戶節(jié)能的辦法，而smart windows 使用的技術(shù)使窗戶能變換顏色。所以C是正確選擇。　　C 短文最后一段的第五句提供了答案。