She spent her teenage years in a否______ to make he

She spent her teenage years in a否______ to make her child.s childhood happy.选择一项

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12 . 为了 ( ),确定轴心受压实腹式构件的截面形式时,应使两个主轴方向的长细比尽可能接近。A

12 . 为了 ( ),确定轴心受压实腹式构件的截面形式时,应使两个主轴方向的长细比尽可能接近。A.便于与其他构件连接B.构造简单、制造方便C.达到经济效果D

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