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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 fee
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.
更多"下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题定1个最佳选"的相关试题:
[单项选择] 下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题定1个最佳选项。 {{B}}第一篇{{/B}}
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American Immigrants
The
percentage of immigrants (including those unlawfully present ) in the United
states has been creeping upward for years. At 12.6 percent, it is now higher
than at any point since the mid 1920s.
We are not about to go
back to the days when congress openly worried about inferior races polluting
America’s bloodstream. But once again we are wondering whether we have too many
of the wrong sort newcomers. Their loudest critics argue that the new wave of
immigrants cannot, and indeed do not want to, fit in as previous generations
did.
We now know that these racist views were wrong. In time,
Italians, Romanians-and members of other so-called inferior races became
exemplary Americans and contributed greatly, in ways too n
A. They were of inferior races.
B. They were a source of political corruption.
C. They were a threat to the nation’s security.
D. They were part of the nation’s bloodstream.
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