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string(229) "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%E8%80%83%E8%AF%95%E8%B5%84%E6%96%99%E7%BD%91 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
二建考试资料网网!