S1: Certain protective devices are fitted in the motor circuit. S2: They can protect against faults such as single phasing, overload or under voltage. Q: Which one is not mentioned?
单选题
S1: I just got my first job offer. S2: So did I. Q: What does the second speaker mean?
单选题
S1: Does it work in good order? S2: Not very good. The driving motor has worn out. Q: What is wrong?
