简述变压器的构造?
参考答案:(1)铁芯
(2)绕组
(3)油箱
(4)油机
(5)呼吸器
(6)防爆管
(7)温度计
(8)套管
(9)冷却装置
(10)净油器
— Where were you last weekend?
— _________________________[ ]
A. She was at home.
B. I was at home.
C. I were at home.
患者,女,38岁,长期伏案工作,腰臀及右侧大腿疼痛近1年,时轻时重,长时间保持某一体位时加重,活动后可稍缓解。
治疗本病有效的方法为
A.热疗
B.卧床休息
C.体育锻炼
D.手术治疗
E.腰椎牵引 P.非甾体类抗炎药