string(274) "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%E4%B8%89%E6%8E%A7%E8%AF%95%E9%A2%98%E5%8F%8A%E7%AD%94%E6%A1%88%E4%BF%AE%E6%94%B9%E7%89%88 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
监理三控试题及答案修改版
