string(240) "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%E5%89%8D%E8%B5%84%E6%96%99%E5%AE%A1%E6%A0%B8 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
二建考前资料审核
