string(235) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E4%BA%8C%E5%BB%BA%E9%A2%98%E9%9A%BE%E4%B8%8D%E9%9A%BE => Failed to connect to 101.89.143.195 port 38205: Connection refused"
2020年二建题难不难
