string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%9B%9B%E5%B7%9D%E4%BA%8C%E5%BB%BA%E6%9C%BA%E7%94%B5%E7%AD%94%E6%A1%88 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
2020四川二建机电答案
