题目内容

对于跨度、截面尺寸、材料标号和配筋量相同的钢筋混凝土梁与预应力梁来说：

A. 前者极限承载能力较大
B. 后者极限承载能力较大
C. 两者的极限承载能力相同
D. 两者的极限承载能力没有可比性

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