string(271) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E6%B0%B4%E5%88%A9%E4%B8%80%E5%BB%BA%E5%AE%9E%E5%8A%A1%E7%9C%9F%E9%A2%98%E6%A1%88%E4%BE%8B => Failed to connect to 101.89.159.206 port 38075: Connection refused"
2020年水利一建实务真题案例
