宽带电视出现节目卡顿或花屏可能是硬件损坏、未连接网络、连接升级服务器失败等还要检查是否为网速慢、机顶盒或猫长时间（）等问题所致。
参考答案：不关机
____that we should look after the three dogs three times, my mother left home.
A．Mentioning
B．Having been mentioned
C．Having mentioned
D．Mentioned
简答静电除雾器的作用。
