AND 和 OR 函数最多可支持 255 个单独条件，但并不建议使用多个条件，因为构建、测试和维护复杂的嵌套公式是非常难的。. NOT 函数仅采用一个条件。. 下面是根据它们的逻辑写出的公式：. 公式. 说明. =IF (AND (A2>0,B2<100),TRUE, FALSE) 如果 A2 (25) 大于 0，并且 B2 (75 ...

若要使用 DirectX 诊断工具 检查你电脑上使用的是哪个版本的 DirectX，请选择 “开始” 按钮，在搜索框中键入 “dxdiag” ，然后按 Enter 。. 在 DirectX 诊断工具 中，选择 “系统” 标签页，然后在 “系统信息” 下面检查 DirectX 版本号。. 你首次使用 DirectX 诊断工具 ...

To sign out, go to Outlook.com. Select your account initials or account picture at the top corner of your Inbox. Select Sign out. Tips: If you don't see your picture at the top of screen, check to see if ad blocking is turned on. Sometimes this prevents the picture from showing. If you don't see see Profile or Account options, you can access ...

需要 Xbox 主機、Xbox 遊戲或 Xbox 網路的協助嗎? 了解如何與我們連絡。請檢查這裡是否發生了已知問題，而這些問題是我們目前正在追蹤，但最後卻發現您可以自行處理的問題。

Collaborate for free with online versions of Microsoft Word, PowerPoint, Excel, and OneNote. Save documents, workbooks, and presentations online, in OneDrive. Share them with others and work together at the same time.

Open a service request in the Microsoft 365 admin center. This service is free. Microsoft Store support. Get help and support, whether you're shopping now or need help with a past purchase. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

取得您語言版本的 Xbox 主機和所有 Xbox 配件的手冊。

To create installation media, go to the software download website, where you'll find step-by-step instructions. On that website, you can select a version of Windows and create your own installation media using either a USB flash drive or a DVD. To go directly to one of the versions, select one of these links: Windows 10 (Then select Download now.)

解决登录到 Skype 时的问题. 如果在登录时遇到问题，请先确保使用的是 最新版本的 Skype，你的系统满足 运行 Skype 的最低要求，并且你拥有适用于计算机的最新软件更新和硬件驱动程序。. 这通常可以解决大部分登录问题。. 什么可能会导致出现此情况？. 忘记了 ...

Close Outlook. Close Teams from the System Tray by right clicking on the Teams icon in the System Tray and select Quit. Restart New Teams. This will force New Teams to reinstall the Teams Meeting Add-in which should fix the issue. When you see Teams Meeting Add-in in the list of installed apps again, restart Outlook and it should be working again.