在电力系统正常状况下,电网装机容量在300万KW及以上的,对供电频率的允许偏差为()。
A.±0.2Hz
B.±0.1Hz
C.±0.5Hz
D.0.1Hz
参考答案:A
A: Good afternoon, Doctor Huang.
B: Good afternoon, young man. 56
A: I have a bad cold. I cough now and then.
B: 57
A: For two days. And I’m feeling terrible now.
B: 58 Oh, you have a fever, too.
A: Is it serious?
B: 59 You just need some medicine.
A: How often should I take the medicine?
B: Three times a day. 60
A: Thanks a lot. Bye!
猪喘气病的病原体是一种支原体。