string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E5%BB%BA%E6%9C%BA%E7%94%B5%E7%B2%BE%E8%AE%B2%E8%8B%8F%E5%A9%B7 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
2021一建机电精讲苏婷
