string(280) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2014%E5%B9%B4%E4%BA%8C%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E6%98%AF%E5%BC%80%E5%8D%B7%E8%80%83%E8%AF%95%E5%90%97 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
2014年二级建造师是开卷考试吗
