问题
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If a country has a population of 20 million and its rate of natural population increase is
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The problem that the population becomes aging ______ .A.is exceptional to GermanyB.has bec
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Brooklyn, New York, had a population of about 23,000 when it becomes a city in 1834.
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Owing to the global recession, it becomes more and more difficult for most college graduat
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It is undeniable that English is beginning to become a global language in most parts of t
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共用题干Global Warming1 Smoke is clouding our
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