问题
单项选择题
下述基坑中（）不是一级基坑。
A．重要工程主体结构基坑
B．开挖深度为12 m的基坑
C．基坑范围内有重要管线
D．开挖深度为6 m，周围环境无特别要求
答案
参考答案：D
解析：
据第7.1.7条
搜题请搜索小程序“爱下问搜题”
下述基坑中（）不是一级基坑。
A．重要工程主体结构基坑
B．开挖深度为12 m的基坑
C．基坑范围内有重要管线
D．开挖深度为6 m，周围环境无特别要求
参考答案：D
解析：
据第7.1.7条
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