打开PDF、下载PDF时提示：
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If this message is not eventually replaced by the proper contents of the document, your PDF
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You can upgrade to the latest version of Adobe Reader for Windows®, Mac, or Linux® by
visiting http://www.adobe.com/go/reader_download.
https://get.adobe.com/cn/reader/enterprise/
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这是因为PDF版本问题导致的。
上面的提示是建议到官网，下载最新版本的软件：
http://www.adobe.com/go/reader_download.但上面的链接是在线引导安装，下载安装完也不知道软件安装到哪了！
很不方便。
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可以用下面的地址，直接下载安装文件：
https://get.adobe.com/cn/reader/enterprise/
在这里可以选择操作系统，版本等，直接下载安装文件。
然后直接在本地安装，就可以了。
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这样还是比较好！
【版權聲明】