未知题型
基层混凝土强度达到设计强度的（ ）以上，方可进行桥面防水层施工。
- A.75%
B.85%
C.80%
D.90%
【参考答案】
C
本题考核的是桥面防水系统施工技术要求。当基层混凝土强度达到设计强度的80%以上时，方可进行桥面防水层施工。
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