大量引水后，膀胱充盈，集合系统可有无回声出现，一般不超过（）。
A.1cm
B.1.5cm
C.2.0cm
D.2.5cm
E.3.0cm
参考答案：A
Please remind me________ he said he was going. I may be in time to see him off. [ ]
A. where
B. when
C. how
D. what
冬季施工混凝土或气温低于5℃时，不得浇水养护（应采取覆盖保温措施）。
