单选题：路基施工挖方路段必须根据测量中线、两侧边桩开挖，一般每侧要比路面宽出（　　）mm。

题目内容：

路基施工挖方路段必须根据测量中线、两侧边桩开挖，一般每侧要比路面宽出（　　）mm。 A．100～300
B．300～500
C．500～700
D．700～1000

参考答案：

答案解析：

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