string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E7%BA%A7%E8%81%8C%E7%A7%B0%E8%80%83%E8%AF%95%E9%87%8D%E7%82%B9 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
中级职称考试重点
