string(271) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E4%B8%80%E5%BB%BA%E6%95%99%E6%9D%90%E5%8F%98%E5%8C%96%E5%A4%A7%E5%90%97%E7%9F%A5%E4%B9%8E => Failed to connect to 125.88.227.171 port 38114: Connection refused"
2020年一建教材变化大吗知乎
