string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%99%AE%E5%A4%96%E4%B8%AD%E7%BA%A7%E8%80%83%E8%AF%95%E5%A4%A7%E7%BA%B2 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
普外中级考试大纲
