string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E8%AF%BE%E7%A8%8B%E5%A4%A7%E6%A6%82%E5%A4%9A%E5%B0%91%E9%92%B1%E4%B8%80%E5%B9%B4%E5%95%8A => Failed to connect to 101.89.117.144 port 38208: Connection refused"
一建课程大概多少钱一年啊
