string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%98%8E%E5%B9%B4%E4%B8%80%E5%BB%BA%E8%80%83%E8%AF%95%E5%A2%9E%E5%8A%A0%E7%A7%91%E7%9B%AE => Failed to connect to 14.18.117.71 port 38069: Connection refused"
明年一建考试增加科目
