string(337) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%86%8C%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%B8%88%E8%80%83%E8%AF%95%E5%91%A8%E6%9C%9F%E5%86%85%E5%8F%AF%E4%BB%A5%E6%8D%A2%E5%9C%B0%E6%96%B9%E8%80%83%E5%90%97 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
注册安全工程师考试周期内可以换地方考吗
