string(236) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad2007%E6%89%93%E5%BC%80%E5%9B%BE%E7%BA%B8%E6%9C%AA%E5%93%8D%E5%BA%94 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
cad2007打开图纸未响应
