string(287) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%89%93%E5%BC%80%E5%9B%BE%E7%BA%B8%E4%B8%80%E7%9B%B4%E6%9C%AA%E5%93%8D%E5%BA%94%E4%BB%80%E4%B9%88%E5%8E%9F%E5%9B%A0 => Failed to connect to 101.91.112.32 port 38195: Connection refused"
cad打开图纸一直未响应什么原因
