雨水防汛站常用（）泵。
A、离水泵
B、混流泵
C、轴流泵
D、螺旋泵
参考答案：C
工作温度低，宜选用粘度低的润滑油。
If we become more________in predicting earthquakes, we'll reduce loss. [ ]
A. exactly
B. correct
C. accurate
D. conscious
