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【简答题】
据统计，2009年底北京市的汽车拥有量已经从2008年底的318万辆增加到400万辆，请利用计算器计算： （1）从2008年底到2009年底，北京市汽车拥有量的年增长率是多少（精确到0.1%）？ （2）如果保持这样的年增长率，到2011年底时北京市的汽车拥有量将达到多少万辆（精确到1万辆）？
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