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%E5%85%89%E5%90%AC%E8%AF%BE%E4%BB%B6%E4%B8%8D%E7%9C%8B%E4%B9%A6%E8%83%BD%E8%BF%87%E5%90%97 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
一建光听课件不看书能过吗
