单选题:大型桅杆式起重机的起重量可达60 t,桅杆设计可达80 m,并根据(  )选择钢丝绳和地锚。

题目内容:
大型桅杆式起重机的起重量可达60 t,桅杆设计可达80 m,并根据(  )选择钢丝绳和地锚。
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紊流射流起始段收缩角大小与(  )有关。

紊流射流起始段收缩角大小与(  )有关。

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His intelligence and experience will__________(使他能够应付复杂局面).

His intelligence and experience will__________(使他能够应付复杂局面).

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根据以下材料回答第题:Going to bed earlier, you may be frustrated by body's internal biolo

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与圆断面射流相比,紊流系数相同时平面射流的扩散角( )。

与圆断面射流相比,紊流系数相同时平面射流的扩散角( )。

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