string(270) "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%80%BB%E6%98%AF%E5%8D%A1%E6%AD%BB => Failed to connect to 101.89.143.195 port 38109: Connection refused"
为什么cad打开图纸总是卡死
