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嵌套 Excel 函数 在某些情况下，您可能需要将相应函数作为另一函数的参数使用。 例如，以下公式使用嵌套 AVERAGE 函数 ，并将结果与值 50 进行比较。 1. AVERAGE 和 SUM 函数嵌套在 IF 函数中。 有效返回值 当将嵌套函数作为参数使用时，该嵌套函数返回的值类型必须与参数使用的值类型相同。

注意: 某些相机将不会显示在“相机设置”页中。其中包括用于 Windows Hello 人脸身份验证的红外线 (IR) 摄像头、使用 DirectShow 技术（如 DSLR 或运动相机制造商提供的便于将其设备用作网络摄像头的许多应用）的相机，以及不由 Windows 管理的专有相机，例如工业相机和许多网络摄像头。

Go to Settings > Connected Devices > Link to Windows > About Link to Windows . or. Swipe downwards from the top of your screen to reveal the Quick Panel, and then select Link to Windows > About Link to Windows . If an update is available, select Update. Wait for the update to complete successfully, then close and reopen the app.

Office 2021 is sold as a one-time purchase, which means you pay a single, up-front cost to get Microsoft 365 apps for one computer. One-time purchases are available for both PCs and Macs. However, there are no upgrade options, which means if you plan to upgrade to the next major release, you'll have to buy it at full price.

Visio Plan 1. Visio Plan 2. Included with Microsoft 365 commercial subscription. $5/user/month (annual subscription) $15/user/month (annual subscription) For casual diagrammers who need to create basic diagrams. For professional diagrammers who are creating, editing, and maintaining diagrams. For specialized diagrammers who need a comprehensive ...

如果未自动显示安装更新说明，则可以手动启动该过程。为此，请按 Xbox 按钮 打开导航页，选择“档案和系统”>“设置”>“设备和连接”>“控制器和耳机”，然后选择要更新的控制器。在 Xbox 无线控制器屏幕上，选择“…”以检查控制器的固件版本。如果它显示“更新”，请选择固件版本，然后 ...

The main difference between a local account and a Microsoft account is that a local account is specific to one device, while a Microsoft account can be used across multiple devices and Microsoft services. A local account is created on the device and doesn't require Internet connectivity to sign in. It's independent of other services, and it's ...

可以使用 简单的公式对) 一组单元格 (区域中的数字求和，但在处理多个数字时 ，SUM 函数 更易于使用。 例如，=SUM (A2：A6) 出现键入错误的可能性小于 =A2+A3+A4+A5+A6。 下面是使用两个单元格区域的公式： =SUM (A2：A4，C2：C3) 对区域 A2：A4 和 C2：C3 中的数字求和。

Recover lost or deleted files. Windows 7. Note: If you've recently updated Windows 10 and are having problems finding files, see Find lost files after the upgrade to Windows 10. If you can't find a file on your computer or you accidently modified or deleted a file, you can restore it from a backup (if you're using Windows backup) or you can try ...