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频域分析方法是从序列自相关的角度揭示时间序列的发展规律。( )
A.错误
B.正确
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The code of an electronic car key can be compared to the 'teeth' of a mechanical car key in their______.
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( )茶艺师在工作时不能使用有香气的化妆品。( )tea artists cannot use perfumed cosmetics at work.
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