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Founded in 1949, the Fraunhofer Society is now Europe’s largest organization for applied technology, and has 59 institutes employing 12,000 people. It continues to grow. Last year it swallowed up the Heinrich Hertz institute for Communication Technology in Berlin. Today, there are seven Fraunhofers in the US and Asi

a.
The Fraunhofer Society has a history of about ______ year(s) till now.A. 60B. 50C. sevenD. one

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单项选择题

The utilities are more interested in protecting their stranglehold on the power grid and preserving their century-old business model than they are producing clean electricity, says Jim Harvey, who heads up the Joshua Tree, Calif. — based Alliance for Responsible Energy Policy, an advocacy group that’s staunchly opposed to utility-generated solar power. Harvey actually believes that the country’s entire renewable portfolio can be achieved through rooftop solar alone. That may be possible from a sheer megawatts perspective, but from a practical standpoint, it’s way over— ambitious. With no centralized source, how do you run traffic or street lights What if it rains for a week We still don’t have foolproof means to store solar power, so for how, distributed generation needs the grid as a backup. What does the author think of Harvey’s idea of achieving the country’s entire renewable portfolio through rooftop solar alone

A. It is possible.
B. It is not practical.
C. It is out of question.
D. It takes time to se

单项选择题

Not long ago, most homeowners saw their roofs as simply something to keep the rain out. Now they see them as a source of electricity. Despite the bad economy, or maybe because of it, the rooftop-solar industry is booming, as Americans become increasingly intrigued(引起兴趣) by the idea of turning their roofs into mini power plants and cutting their electric bills. In 2008,33,500 rooftop solar systems were installed in the United States, a 63 percent increase over the amount of capacity installed in 2007. In California, the solar capital of country, the increase was 95 percent. The paragraph centers on the fact that

A. roofs used to be seen as a kind of protection from rain.
B. economy in the US is bad at present time.
C. roofs can be used as a source of electricity.
D. the rooftop-solar industry is developing fast in the US.

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