油浸式接地变压器本体巡视，阀门必须根据（）需要，处在关闭和开启位置。指示开、闭位置的标志清晰、正确。
A.实际
B.定值单
C.检修
D.调度
参考答案：A
____ to work on time, she has to start very early every morning to avoid the traffic jam. [ ]
A. To get
B. Getting
C. To have got
D. Get
什么条件下应更换轧辊？
