string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=f1%E6%96%B9%E7%A8%8B%E5%BC%8F%E8%83%BD%E8%B7%91%E5%A4%9A%E5%BF%AB => Failed to connect to 14.18.117.71 port 38093: Connection refused"
f1方程式能跑多快
