She obtained a Diploma in Personnel Management in December.

She obtained a Diploma in Personnel Management in December.

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Bicycle sales decreased steadily from 2006 to 2008.

Bicycle sales decreased steadily from 2006 to 2008.

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根据以下内容回答题:请回答第6题:(  )

根据以下内容回答题:请回答第6题:(  )

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