string(258) "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%E6%9C%89%E5%A4%9A%E5%B0%91%E9%81%93%E9%A2%98%E7%9B%AE%E5%AE%9E%E5%8A%A1 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
二建有多少道题目实务
