string(231) "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%80%83%E5%87%A0%E9%97%A8%E8%AF%BE%E7%A8%8B => Failed to connect to 101.89.159.206 port 38187: Connection refused"
一建考几门课程
