string(338) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%A1%B9%E7%9B%AE%E6%8A%80%E6%9C%AF%E8%B4%9F%E8%B4%A3%E4%BA%BA%E9%9C%80%E8%A6%81%E4%BB%80%E4%B9%88%E8%AF%81%E4%B9%A6%E6%B3%95%E5%BE%8B%E8%A7%84%E5%AE%9A%E6%9C%89%E5%90%97 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
项目技术负责人需要什么证书法律规定有吗
