单选题：Paragraph 5__________

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题目内容：
Paragraph 5__________ A．How does the "grid" work?
B．Power shared
C．Just make a request
D．Limitations of present Internet use
E．Distance is not a problem
F．A new era for the Internet

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The Columbia University researchers studied the relationship

The Columbia University researchers studied the relationship between the past E

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The world champion suffered a sensational defeat．

The world champion suffered a sensational defeat．A．dramatic B．reasonable C．humi

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We don't know if there is a limit__________

We don't know if there is a limit__________A．to avoid psychological techniques.

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回答题：Citizen ScientistsUnderstanding how nature responds to climate change will r

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