[单选题]检修整流、变流及磁饱和等电源设备时,电压高于(　　)的设备应关闭电源,并通过人工放电,释放电容器电能后,方可开始工作。[922000000]
A.36V
B.110V
C.220V
D.380V

Passage Four
Dressing fashionably was very important in fourteenth-century Spain. This was especially true for any man who considered himself an aristocrat or dandy. Before going out, a well-dressed man would put on his finest boots, one of his embroidered caps and his favorite beard, dyed to match the color of his clothing.
Believe it or not, false beards were once as popular as neckties are today. Beards had for years considered a sign of strength and manhood, and the bigger and thicker they were, the better. Those unfortunates who had little facial hair were forced by custom into wearing false beards made of horsehair. Soon, however man in the Spanish fashion world was wearing them too, while many quite substantial real beards were shaved off to make way for the false variety.
By day, the fashionable dandy might wear a yellow or a crimson beard to impress his friends, but in the evening a long black beard was proper for serenading his senorita, A
A. giving old or humorous examples
B. using convincing arguments
C. giving eyewitness accounts
D. saying that Philip IV of Aragon put a stop to it

患儿2岁，低热2月余，咳嗽、消瘦、食欲不振，夜间汗多，体检双肺呼吸音粗，未闻及湿哕音，OT试验（++），胸片检查为原发综合征。