string(260) "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%E7%BB%9C%E6%B5%8B%E9%80%9F%E4%B8%80%E8%88%AC%E6%98%AF%E5%A4%9A%E5%B0%91 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
1000兆网络测速一般是多少
