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【简答题】
某井设计7000m，上第一选用直径为114.3mm的S级钢，其最小屈服强度下的抗拉载荷Py=1470.9kN，若取拉力余量为450kN，则由拉力余量计算出的最大允许静拉负荷为（ ）kN。（仅填写数字，注意保留小数点后一位数）
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相关题目：
【单选题】Some experts believe that___________.
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A.
赋初值时
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C.
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自汗
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赋初值时
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