string(240) "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%E7%AE%A1%E7%90%86%E8%83%8C%E8%AF%B5%E8%80%83%E7%82%B9 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
一建管理背诵考点
