string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8A%95%E5%BD%B1%E5%92%8C%E6%B6%B2%E6%99%B6%E6%AF%94%E5%93%AA%E4%B8%AA%E6%95%88%E6%9E%9C%E5%A5%BD => Failed to connect to 61.171.74.35 port 38027: Connection refused"
投影和液晶比哪个效果好
