丹皮的功效是()
A.凉血止血,杀虫
B.凉血消斑,定惊
C.凉血活血,退虚热
D.凉血活血,泻肝火
参考答案:C
We _____ peanut before we eat them. [ ]
A. eat
B. hit
C. peel
晶闸管的过电流与过电压如何保护?