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What type of security system can help the police track down a stolen car？

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The special committee recommended that _________ (这项工程不应动工)until all the preparations have been made.

A traditional development pattern for IT industry will cause a rapid increase in___________.

(Passage 2, Lines 1-2, Para. 5)
Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged;

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A B C D