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  3. Sally Kemmerer has, so far, escaped Northern California’s rolling blackouts. But up on the roof for her Oakland home, worker

Sally Kemmerer has, so far, escaped Northern California’s rolling blackouts. But up on the roof for her Oakland home, worker

admin2015-01-15  3
问题     Sally Kemmerer has, so far, escaped Northern California’s rolling blackouts.
    But up on the roof for her Oakland home, workers are tapping into, perhaps, the most reliable power source, the sun. It could mean no more worries about blackouts or power rates.
    Sally Kemmerer, a home owner, says, "I hope that we’ll be able to zero out, you know, our electric bill. I mean that’s definitely our goal. "
    Turning the sun’s rays into electricity is, of course, nothing new.
    But California’s power crisis has cast a new light on the technology.
    Gary Gerber, a solar power contractor, says, "I might have been getting three phone calls a week a couple of months ago. I’m getting six a day now, it’s completely crazy. "
    Alternative energy is even more attractive, thanks to a state rebate program. So far this month, California’s energy commission has received 200 project applications. That is more than the number of applications all last year.
    Putting in a solar roof is still a relatively expensive proposition. This project cost around 45,000 dollars. Even taking into account the state subsidy of 12,000 dollars, that leaves a net cost to the home owner of around 33,000 dollars.
    Sally says, "We were happy to find out that, eventually, the system should pay for itself, you know 20 years, maybe. "
    Aaron Wellendorf has had a p-v(or photovoltaic generator)for more than a year. Like most solar systems, his is not off the grid completely and the utility still kicks in at night, or when there’s no sun. But when there is bright light, things change.
    Wellendorf says, "I’m turning my meter backward with extra power that I’m generating. " Backward?
    That’s right! Wellendorf’s meter tracks how much power goes back into the utility grid. Last year all he paid for electricity was a service charge. That charge was around five dollars a month.
    In fact, even after powering his super-efficient household appliances and his converted electric track, Wellendorf generated a net surplus of more than 2,000 kilowatt hours.
    Unfortunately, state law doesn’t require the utility to pay him for that. Wellendorf says, "I don’t get it in money, I just get the satisfaction of helping out the power grid. "
    And, he gets the satisfaction of being energy self-sufficient.
When we read "Wellendorf’s meter tracks how much power goes back into the utility grid", we get to know that______.
选项 A、the man uses less of electric utility than before he set up his p-v generator
B、the man gets extra power which he is generating himself
C、the man is satisfied with being energy self-sufficient
D、the man is happy to find out that the p-v system should pay for itself
答案B
解析 倒数第三段中的a net surplus的意思是“净盈余”，再结合本段其他内容可以确定答案是B。
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