对于采用24V电源的音响,在维修时首先要断开降压电路后面的负载。()
参考答案:对
Have you anything to ____ at the Customs?[ ]
A. announce
B. publish
C. pronounce
D. declare
病毒性脑炎脑脊液检查多为:压力_______,外观_______,白细胞数_______,蛋白_______,糖_______。