string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%9C%9F%E5%BB%BA%E7%B1%BB%E9%9D%A2%E8%AF%95%E4%B8%93%E4%B8%9A%E7%9F%A5%E8%AF%86 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
土建类面试专业知识
