When we entered the room, the lights suddenly.
A.got off
B.set up
C.went out
D.put out
答案:C
皮肤病症状为渗出与糜烂少,有鳞屑和结痂时,多选用()
A.洗剂
B.溶液湿敷
C.油膏软膏
D.酊剂
E.粉剂
双闭环调速系统中速度调节器与电流调节器应实现串级联接()