string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E5%B7%A5%E7%A8%8B%E6%B3%95%E8%A7%84%E7%9F%A5%E8%AF%86%E7%82%B9 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
二建工程法规知识点
