string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E5%B8%82%E6%94%BF2020%E9%A2%98%E7%9B%AE%E7%AE%80%E5%8D%95 => Failed to connect to 101.91.112.32 port 38195: Connection refused"
二建市政2020题目简单
