带电作业工作票,对()且依次进行的带电作业,可在数条线路上共用一张工作票。
A、同类型
B、同一电压等级
C、相同安全措施
D、不同电压等级
参考答案:A, B, C
If the dog hadn’t woken us, we wouldn’t have noticed the fire and it _____ to the house next door.
A.could spread
B.should have spread
C.would spread
D.might have spread
冷沉淀的输注适应症是什么?