string(265) "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%E6%A8%A1%E6%8B%9F%E8%80%83%E8%AF%95%E9%A2%98%E6%AF%8F%E6%97%A5%E4%B8%80%E7%BB%83 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
二建模拟考试题每日一练
