string(260) "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%E7%9C%9F%E9%A2%98%E9%92%A2%E7%AD%8B%E9%A2%98 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
2020年水利一建真题钢筋题
