string(283) "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%88%B7%E9%A2%98%E9%83%BD%E5%88%B7%E6%A8%A1%E6%8B%9F%E9%A2%98%E8%BF%98%E6%98%AF%E7%9C%9F%E9%A2%98 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
二建刷题都刷模拟题还是真题
