string(274) "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%AE%9E%E5%8A%A1%E6%B1%9F%E5%87%8C%E4%BF%8A%E8%AE%B2%E7%9A%84%E5%8F%AF%E4%BB%A5%E5%90%97 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
二建实务江凌俊讲的可以吗
