string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%95%99%E5%B8%88%E4%B8%80%E5%AF%B9%E4%B8%80%E5%B8%AE%E6%89%B6%E8%BF%87%E7%A8%8B => Failed to connect to 61.171.74.35 port 38027: Connection refused"
教师一对一帮扶过程
