You need to unplug the electric blanket before you go to bed, because even though there is no ______ when they are turned off, there may still be a high electric field.
【单选题】听力原文:W: Look, it says they want a senior sales manager, and it seems that it is a big company. M: That's great! For you might have to travel a lot. Do they say anything about experience? Q: What are t...