A. Where is the symptom? B. Where is the discomfort? C. Do you need a health care massage? D. where are the discomfort?
A. 油面高低 B. 上层油面温度 C. 外壳接地是否良好 D. 检查套管是否清洁 E. 声音是否正常
A. 正确 B. 错误
A. 电击 B. 电烧伤 C. 触电