string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%AE%89%E5%B8%88%E5%8C%96%E5%B7%A5%E5%AE%89%E5%85%A8%E9%A2%98%E5%9E%8B%E5%88%86%E5%B8%83 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
注安师化工安全题型分布
