string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E7%BA%A7%E9%80%A0%E4%BB%B7%E8%AE%A1%E7%AE%97%E9%A2%98%E9%9A%BE%E5%BA%A6 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
一级造价计算题难度
