题目内容：
桥梁排水设施日常养护中， 进水口按每月 ()的频率清捞。
A.一次
B.两次
C.三次
D.四次
参考答案：
选择题：桥梁排水设施日常养护中， 进水口按每月 ()的频率清捞。
- 题目分类：二级造价工程师
- 题目类型：选择题
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