string(267) "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%8F%AA%E5%90%AC%E8%AF%BE%E4%BB%B6%E5%8F%AF%E4%BB%A5%E9%80%9A%E8%BF%87%E5%90%97 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
一建只听课件可以通过吗
