客运专线预制梁架设后，与相邻预制梁端的桥面高差不应大于（），支点处桥面标高误差应在+0～-20mm。
A、5mm
B、10mm
C、20mm
参考答案：B
— Well, I found this. I think it must be yours.
— My watch! Thank you. Where ______ it? [ ]
A. do you find
B. have you found
C. did you find
D. were you finding
给水工程通常由取水工程，给水处理工程和（）工程组成。
A、输水
B、配水
C、泵站
D、输配水
