She __________the piano since she was a child.

She __________the piano since she was a child.

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__________ ! There's a train coming,

__________ ! There's a train coming,

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建筑剖面图的内容包括(  )。

建筑剖面图的内容包括(  )。

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地基单位面积所能承受的最大压力,叫(  )。

地基单位面积所能承受的最大压力,叫(  )。

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