S1: There is a lot of dust on the surface and inside the main switchboard, and it needs to be removed immediately. S2: Yes. The internal dust can be blown off with compressed air. Q: How to remove the dust inside the switchboard?
单选题
S1: Could you show me your documents and certificates? S2: Ok. They are all in that bookcase. Please follow me. I’Il show you. Q: Where are the documents and certificates?
单选题
S1: Can you operate the emergency generator? S2: All right. Q: What does the first speaker want to do?
