string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B1%9F%E8%8B%8F%E4%BA%8C%E5%BB%BA%E6%9C%BA%E7%94%B5%E5%AE%9E%E5%8A%A12021 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
江苏二建机电实务2021
