题目：
保护层厚度是指（）。
A、从受力纵筋边缘到混凝土边缘的的距离
B、箍筋外皮到筋混凝土边缘的距离
C、纵向受力筋合力点到混凝土外边缘的距离
D、分布筋外边缘到混凝土、边缘的距离
答案：
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参考答案：A
保护层厚度是指（）。A、从受力纵筋边缘到混凝土边缘的的距离 B、箍筋外皮到筋混凝土边
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