string(276) "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%E7%9C%9F%E9%A2%98%E4%BF%9D%E6%8C%81%E5%A4%9A%E5%B0%91%E5%88%86%E5%8F%AF%E4%BB%A5%E8%BF%87 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
二建真题保持多少分可以过
