当淹水沉井下到设计深度后，应首先进行水下（）。
A.浇灌封底止水垫
B.下部注浆封水
C.试排水观察
参考答案：A, B
— What's wrong with you?
— ________. [ ]
A. My bike is broke
B. I have a stomachache
C. My TV doesn't work
D. My watch can't go
根据《公路工程质量检验评定标准》规定，当土方路基施工路段较短时，分层压实度只要点点符合要求即可。( )
