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%E6%9C%BA%E7%94%B5%E8%80%83%E8%AF%95%E6%8A%80%E5%B7%A7 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
二建机电考试技巧
