string(260) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2012%E4%B8%80%E9%80%A0%E6%A1%88%E4%BE%8B%E5%88%86%E6%9E%90%E7%9C%9F%E9%A2%98%E8%A7%A3%E6%9E%90 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
2012一造案例分析真题解析
