string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E5%B9%B4%E4%B8%80%E5%BB%BA%E8%AF%95%E5%8D%B7%E6%B2%A1%E6%9C%89%E8%AF%95%E5%8D%B7%E4%BB%A3%E7%A0%81 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
2021年一建试卷没有试卷代码
