SF6气体在电弧和电晕的作用下,产生低氟化物,该物质()。
A、常温下无毒
B、有剧毒
C、能够引起绝缘和结构材料损坏
D、不受水分及电场不均匀影响
参考答案:B, C
________ the whole society care for children as well as their parents, children can grow healthily and happily
A.As soon as
B.Once
C.The moment
D.So long as
临床定取方法是:
A.足三里穴下约2寸
B.委中穴下2寸
C.曲泉穴下2寸
D.阳陵泉穴下2寸
E.阳陵泉穴下1~2寸处,压痛点取穴