差压式流量计主要由差压计、引压管、（）组成。
A、锥形管
B、叶轮
C、节流装置
D、转子
参考答案：C
The longexpected match was ________ at halftime because of the poor weather conditions.
A．disappeared
B．removed
C．abandoned
D．continued
电缆桥塞施工中，火药未点燃，电缆上提速度不准大于（）/h，中途不准停车，直至起到井口。
