string(288) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%BA%E4%BB%80%E4%B9%88cad%E6%89%93%E5%BC%80%E5%9B%BE%E7%BA%B8%E6%B2%A1%E6%9C%89%E6%98%BE%E7%A4%BA%E5%9B%BE%E7%BA%B8 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
为什么cad打开图纸没有显示图纸
