水泥车是专供油、气井进行（）、冲洗的特种车辆，是重要的循环设备.
参考答案：循环
—What's the matter?
—_____________[ ]
A. I'm coming in a minute
B. I have a bad cold.
C. I'm going to buy some food.
D. I watched TV last night.
逸气
