string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%AC%E5%8F%B8%E5%88%9B%E6%96%B0%E7%9A%84%E4%BE%8B%E5%AD%90%E9%AB%98%E8%80%83%E4%BD%9C => Failed to connect to 14.18.117.71 port 38069: Connection refused"
公司创新的例子高考作
