string(237) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=1000%E5%85%86%E7%BD%91%E9%80%9F%E6%B5%8B%E8%AF%95%E5%A4%9A%E5%B0%91kbps => Failed to connect to 14.18.117.71 port 38133: Connection refused"
1000兆网速测试多少kbps
