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如果遇到特定文件类型的错误，则可能是编解码器缺失或过时。 若要解决此问题，请执行以下操作： 检查文件属性： 确保电脑上有正确的编解码器来播放媒体文件。 若要检查文件格式和编解码器信息，请右键单击媒体文件，选择“属性”，然后转到“详细信息”选项卡。

Type of Range: The AGGREGATE function is designed for columns of data, or vertical ranges. It is not designed for rows of data, or horizontal ranges.

Apply recommended actions. In the Accessibility pane, you'll see a list of errors and warnings, with how-to-fix recommendations for each.. To quickly correct the issues, apply one of the recommended actions. For more information on how the findings are categorized, see Rules for the Accessibility Checker. In the Accessibility pane, select an issue under Warnings or Errors.

We believe that Microsoft Teams (free) is a place where minors can interact safely to build on friendships and meaningful community. We also know that keeping online experiences safe and positive involves more than building in permission settings and controls.

Press the Start button , and then enter store into the search bar.; Choose Microsoft Store from the results to open the app.; Select your account in the top-right corner of the screen, and then select Redeem code or gift cards.; Enter the 25-character code, select Next, and then follow the prompts.

本文介绍 Microsoft Excel 中 PRODUCT 函数的公式语法和用法。. 说明. PRODUCT 函数将作为参数提供的所有数字相乘，并返回乘积。 例如，如果单元格 A1 和 A2 包含数字，则可以使用公式 =PRODUCT (A1，A2) 将这两个数字相乘。 还可以使用乘 (*) 数学运算符来执行相同的运算;例如 ，=A1 * A2。

在该应用的设置页上，更改"允许 此应用在后台运行"的设置。下面是每个选项的摘要： 始终为 。始终允许应用在后台运行（接收信息、发送通知和保持最新状态，即使你未主动使用它）。

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You may see an "account frozen" message and icon if you have exceeded your storage allowance and/or haven't signed in for a long time. You just need to get back under your Microsoft storage quota to get access to your files again.