string(289) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E7%9B%91%E7%90%86%E6%95%99%E6%9D%90%E6%94%B9%E7%89%88%E5%8F%98%E5%8C%96%E5%A4%A7%E5%90%97%E4%B8%BA%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
2021监理教材改版变化大吗为什么
