桩端达到硬土层或岩层,荷载主要靠桩端反力支承的是(  )。

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换填的砂和砂砾石垫层,其砂和砂砾石中的含泥量均应小于(  )。

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The word "tricks" at the end of Paragraph 2 is closest in m

The word "tricks" at the end of Paragraph 2 is closest in meaning toA. "experi

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Volunteers have to get prepared for the time in the calorime

Volunteers have to get prepared for the time in the calorimeterA.the volunteers

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