string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%B4%A2%E7%88%B1k790c%E6%94%AF%E6%8C%81%E5%A4%9A%E5%A4%A7%E7%9A%84%E5%8D%A1 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
索爱k790c支持多大的卡
