string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E8%80%83%E8%AF%95%E5%86%85%E5%AE%B9%E4%B8%80%E6%A0%B7%E5%90%97 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
二建考试内容一样吗
