string(288) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E7%90%86%E5%B7%A5%E7%A8%8B%E5%B8%88%E7%BD%91%E6%A0%A1%E9%82%A3%E4%B8%AAapp%E5%88%B7%E9%A2%98%E5%A5%BD%E4%BA%9B => Failed to connect to 101.89.143.195 port 38109: Connection refused"
监理工程师网校那个app刷题好些
