string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E6%A2%AF%E7%9B%91%E6%8E%A7%E7%94%A8%E6%97%A0%E7%BA%BF%E5%A5%BD%E8%BF%98%E6%98%AF%E6%9C%89%E7%BA%BF%E5%A5%BD%E5%91%A2 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
电梯监控用无线好还是有线好呢
