居住区无护栏水体的近岸2m范围内及园桥、汀步附近2m范围内，水深不应大于（）
A.0.5m
B.0.8m
C.1-2m
D.1.5m
参考答案：A
--Writing is a skill, it looks easy but it be difficult.
--No wonder I'm not so good at writing. I need to practice a lot.
A. must
B. can
C. should
混凝土在浇筑完毕后，应该按施工技术方案及时采取有效的养护措施，这些措施应符合哪些规定？
