题目内容：
防水砼抗渗分为()个等级A.2
B.3
C.4
D.5
参考答案：
选择题：防水砼抗渗分为()个等级A.2B.3C.4D.5
- 题目分类：华北水利水电-土木工程-房屋结构设计
- 题目类型：选择题
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A.2
B.3
C.4
D.5
A.2
B.3
C.4
D.5
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5Could you make an appointment with Doctor Wilson
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