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Now, E0,000 species or so are estimated to become extinct ev......

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单项选择题
From the passage, we can infer that big bang means______.
A．the explosion happened billions of years ago, from a single point of nearly infinite energy destiny, which brought about the present universe
B．the restructuring of the securities industry which took place in London during the late 1980s
C．the financial system reform that will happen in Japan
D．a thorough reform in the system of economy or politics etc
单项选择题
As used in paragraph 2 of this passage, the word revitalize means______.
A．to restore vitality
B．to reconsider for further improvement
C．to return to a former stage
D．to attach importance
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