string(245) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad2016%E6%BF%80%E6%B4%BB%E7%A0%81%E4%B8%BA%E4%BB%80%E4%B9%88%E9%94%99%E8%AF%AF => Failed to connect to 61.171.74.35 port 38027: Connection refused"
cad2016激活码为什么错误
