string(283) "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%E5%9F%BA%E7%A1%80%E7%8F%AD%E4%B8%8E%E7%B2%BE%E8%AE%B2%E7%8F%AD%E5%8C%BA%E5%88%AB%E5%A4%A7%E5%90%97 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
一建基础班与精讲班区别大吗
