疖的治疗方法,以下列哪项为主()
A.散风清热
B.泻火解毒
C.凉血活血
D.清热解毒
E.和营解毒
参考答案:D
解析:疖的治疗方法以清热解毒为主。
一个电感线圈被短接以后,需经0.1s后电感线圈内的电流才减少到初始值的35%;如果用5Ω的电阻R来代替短路线,那么需经0.05s后电感线圈内的电流才减少到初始值的35%。试求电感线圈的电阻r和电感L()。
A.3Ω 5H
B.5ΩQ 0.476H
C.5Ω 0.5H
D.3Ω 467Mh
— Do you know sound travels very fast?
— Yes. But light travels sound.[ ]
A. as fast as
B. a little faster than
C. much faster than
D. slower than