string(301) "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%A8%A1%E6%8B%9F%E5%8D%B7%E5%92%8C%E7%9C%9F%E9%A2%98%E5%8D%B7%E7%9A%84%E5%8C%BA%E5%88%AB%E5%9C%A8%E5%93%AA%E9%87%8C => Failed to connect to 14.18.117.71 port 38133: Connection refused"
二建模拟卷和真题卷的区别在哪里
