单选题:下列适用于大跨度屋架、薄腹梁、起重机梁等大型构件的预应力结构是(  )。

题目内容:
下列适用于大跨度屋架、薄腹梁、起重机梁等大型构件的预应力结构是(  )。 A.预应力混凝土钢绞线
B.冷拔低碳钢丝
C.预应力混凝土用钢丝
D.热处理钢筋

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答案解析:

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