【多选题】一个完整的客户服务中心,一般由以下哪些部分组成?( )
A.
PBX(程控交换机)、ACD(自动呼叫分配)、IVR(交互式语音应答)系统
【简答题】Joe Brown had a shop. He sold(卖) meat in his shop . One Thursday a woman came into his shop at five to one . “I’m sorry I’m late,” she said. “I need some more meat for my dinner tonight.” Joe had only...
【简答题】如图,直线y=x+1与y轴交于A点,与反比列函数y= (x>0)的图象交于点M,过M作MH⊥x,且tan∠AHO= . (1)求k的值; (2)设点N(1,a)是反比例函数y= (x>0)图像上的点,在y轴上是否存在点P,使得PM+PN最小,若存在,求出点P的坐标;若不存在,请说明理由.