string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%88%91%E5%9B%BD%E4%BC%81%E4%B8%9A%E5%88%9B%E6%96%B0%E7%9A%84%E7%8E%B0%E7%8A%B6%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 14.18.117.71 port 38220: Connection refused"
我国企业创新的现状有哪些
