sum_range 可选。要添加的实际单元格，如果要添加在范围参数指定以外的其他单元格。如果省略sum_range参数，Excel就会添加范围参数中指定的单元格（与应用标准的单元格相同）。. Sum_range 的大小和形状应该与范围相同。如果不这样做，性能可能会受到影响，而且该公式将对从sum_range中第一个单元格 ...

Choose a default app. The Open in app feature supports all file types, not just Word, Excel, and PowerPoint. For example, you can open a .pdf or a .mp4 file in the desktop app by clicking the Open in app option.. If there is a default app available to open a file, then the Open in app option automatically chooses the default app to open that file.

OneDrive for Business provides one place to store, share and sync your work or school files.

Get productive quickly with Microsoft 365 videos and tutorials. Explore Microsoft 365 training guides and tips to collaborate with anyone, anywhere.

了解如何为 Xbox 设备获取服务。 如果已注册了设备，请登录到设备服务页，以查看该设备的保修状态。

View more Microsoft account help topics. Need more help? Contact Support. For technical support, go to Contact Microsoft Support, enter your problem and select Get Help.If you still need help, select Contact Support to be routed to the best support option.

To save time on tasks you do often, bundle the steps into a macro. First, you record the macro. Then you can run the macro by clicking a button on the Quick Access Toolbar or pressing a combination of keys.

注意: 默认情况下，所有搜索都是 and 搜索。 必须将 not 和 or 运算符大写。 否则，必应将忽略它们作为停止字词，这些字词和数字是常见的单词和数字，为加快全文搜索速度而省略。

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Quickly single-space your entire document using the Paragraph Spacing button on the Design tab.. Single-space your document. Select the top of the document.