砂浆、混凝土防水剂是指能降低砂浆、混凝土在静水压力下的透水性的外加剂。( )
参考答案：对
I threatened to report the taxi driver for illegally ______ a passenger, but he pointed at his "Not for Hire"
sign and drove away. [ ]
A. resisting
B. rejecting
C. disposing
D. removing
机组调相运行时，充气压水的水面在（）以下（最靠近）。
A、导叶
B、叶片
C、转轮下环
D、尾水管
