string(235) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E5%B9%B4%E4%B8%80%E5%BB%BA%E8%AF%BE%E4%BB%B6%E4%B8%8B%E8%BD%BD => Failed to connect to 101.89.166.210 port 38089: Connection refused"
2021年一建课件下载
