string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E6%B0%B4%E5%88%A9%E7%AD%94%E6%A1%882022%E8%A1%A5%E8%80%83 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
一建水利答案2022补考
