What will be the benefit if the research on smart windows turns out to be successful, according to the last paragraph?
A．The buildings will look different.
B．Windows can be as large as you want.
C．We may not need air conditioners any more.
D．They are less expensive than traditional windows.
第1题：
Smart Window
Windows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a flip of a switch.
"It took us a long time to figure out what a window really is," says Claes Granqvist. He's a professor of solid-state physics at Uppsala University in Sweden. "It's 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 they're stuck indoors.
Yet, windows are the weak link in a building when it comes to energy and temperature control. In the winter, cold air leaks in. When it's hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on 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.
Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing, and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color.
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 it's completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark.
One important feature that makes a smart window so smart is that it has a sort of "memory. " All it takes is a small jolt of voltage to turn the window from one state to the other. Then, it stays that way. Transitions take anywhere from 10 seconds to a few minutes, depending on the size of the window. The development of smart windows could mean that massive air conditioning systems may no longer need. "In the future," Granqvist says, "our buildings may look different. "
Which of the following statements does not indicate the importance of windows as described in the first two paragraphs?
A．Windows can change from clear to dark to save energy.
B．Windows help to save energy by letting light in.
C．Windows help to save energy by providing heat.
D．Windows enable people to have contact with the outside world.
第2题：
According to Paragraph 2， some organizations check their systems to find out
[A] whether there is any weak point.
[B] what sort of data has been stolen.
[C] who is responsible for the leakage.
[D] how the potential spies can be located.
第3题：
(A) you can get
(B) that you can get
(C) what you can get
(D) which you can get
正确答案：D
解答参考：D.定语从句题。这是一个非限制性定语从句作为插入语直接跟在先行词books的后面，非限制性定语从句修饰物只能由which 引导。【译文】 这些书你可以在任何商店买到，并且能给你想要的任何信息。
第4题：
E
All too often , a choice that seems sustainable（可持续的）turns out on closer examination to be problematic. Probably the best example is the rush to produce ethanol（乙醇）for fuel from corn . Corn is a renewable resource —you can harvest it and grow more, almost limitlessly . So replacing gas with corn ethanol seems like a great idea .
One might get a bit more energy out of the ethanol than that used to make it, which could still make ethanol more sustainable than gas generally, but that’s not the end of the problem. Using corn to make ethanol means less corn is left to feed animals and people, which drives up the cost of food. That result leads to turning the fallow land — including, in some cases, rain forest in places such as Brazil — into farmland, which in turn gives off lots of carbon dioxide（CO2）into the air. Finally, over many years, the energy benefit from burning ethanol would make up for the forest loss. But by then, climate change would have progressed so far that it might not help.
You cannot really declare any practice “sustainable” until you have done a complete lift-cycle analysis of its environmental（环境的）costs. Even then, technology and public policy keep developing, and that development can lead to unforeseen and undesired results. The admirable goal of living sustainable requires plenty of thought on an ongoing basis.
57. What might directly cause the loss of the forest according to the text?
A. The growing demand for energy to make ethanol.
B. The increasing carbon dioxide in the air.
C. The greater need for farmland.
D. The big change in weather.
第5题：
According to the passage, which of the following statement is true? __________.
A． People can know happiness at any age.
B． A happy person lives a successful life.
C． Enjoying what you have can make you happy.
D． Parents want to pursue the study of happiness.
第6题：
What are smart windows, according to Paragraph 4 ?
A．Windows that are coated.
B．Windows that are glazed.
C．Windows the color of which can be changed.
D．Windows that have many layers.
第7题：
According to the last paragraph, most Asian central banks are becoming _____.
［A］ rather regretful
［B］ less ambitious
［C］ more cautious
［D］ speculative
本题考查推理引申。文章最后一段第二句提到，一直以来作为美国国债最大的外国买家的亚洲中央银行最近改变了过去的做法。接着该段以具体数据说明外国买家购买美国国债的数量下降。从文中“swallowing American government debt like there was no tomorrow”可看出作者认为大举购买国债的做法是“不谨慎”的，而下文“have had second thoughts”他表明它变得更加慎重，因此［C］为正确答案。
第8题：
A、you can get
B、that you can get
C、what you can get
D、which you can get
第9题：
According to the last paragraph, it is important to____________.
A. eat something for breakfast B. be careful about what you eat
C. heat up food before eating it D. eat calorie-controlled food
第10题：
According to the last paragraph, it is important to____________.
A．eat something for breakfast
B．be careful about what you eat
C．heat up food before eating it
D．eat calorie-controlled food