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土方边坡的坡度是指边坡的水平投影宽度与边坡高度之比。 ()

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流行性感冒的传播途径主要通过空气飞沫传播。()

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在场地平整的方格网中，各方格角点的施工高度为该角点的自然地面标高与设计标高的差值。 ()

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