string(354) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%92%E8%81%94%E7%BD%91%E6%8A%80%E6%9C%AF%E7%9A%84%E5%B9%BF%E6%B3%9B%E5%BA%94%E7%94%A8%2C%E5%AF%B9%E5%9F%8E%E5%B8%82%E7%AE%A1%E7%90%86%E4%BA%A7%E7%94%9F%E7%9A%84%E5%8E%9F%E5%9B%A0PPT => Failed to connect to 125.88.227.171 port 38062: Connection refused"
互联网技术的广泛应用,对城市管理产生的原因PPT
