VLOOKUP 第一个参数是要查找的值。. 此参数可以是单元格引用，也可以是固定值，例如“smith”或 21,000。. 第二个参数是单元格搜索范围 C2-:E7，VLOOKUP 在其中搜索要查找的值。. 第三个参数是单元格范围内包含所查找值的列。. 第四个参数可选。. 输入 True 或 False ...

Help with BitLocker. Finding product keys for Windows and Office. Other support. Help with a work or school account password. I need to talk to a customer support agent. Learn how to get Microsoft account help, troubleshoot sign in issues, keep your account secure, and manage your Microsoft account dashboard.

了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。 BitLocker 是 Windows 加密技术，它通过加密驱动器并要求一个或多个身份验证因素才能解锁驱动器来保护数据免受未经授权的访问。

Change screen orientation. Windows 11 Windows 10. Windows 11 Windows 10. Select the Start button, then type settings. Select Settings > System > Display, and choose a screen orientation from the drop-down list next to Display orientation. Change screen orientation. Use the Settings app in Windows to change screen orientation.

To check if Windows 11 is ready for your device, go to Start > Settings > Update & Security > Windows Update and select Check for updates. If the upgrade is available for your device and you want to proceed, download and install it. Note: Downloading and installing Windows 11 will most likely take longer than a typical Windows 10 feature update.

To sign out everywhere. Sign in to your Advanced security options on your Microsoft account security dashboard. Sign in. Scroll down to Sign me out and select Sign me out. Note: Sign out may take up to 24 hours.

Upgrade to Windows 11: FAQ. An upgrade differs from an update in that it moves your PC from a previous version of Windows—such as Windows 10—to Windows 11. This FAQ is intended to answer questions about upgrading to Windows 11. An update ensures you have the most recent features and security improvements for your current version of Windows.

Use as wallpaper. Most of the daily images are available for download to use as wallpaper. Hover over the image headline and select Download today's image. If licensing restrictions don't allow downloads of a given image, there's a link to download the Bing Wallpaper app, which offers a library of images featured on Bing.

啟動 Microsoft 365. 開啟 Word 或 Excel 等任何應用程式，即可開始使用 Microsoft 365 應用程式。. 安裝後找不到 Office？. 在大多數的情況下，在您開啟應用程式並按一下 [接受] 以同意授權條款之後，Microsoft 365 就會啟用。. Office 可能會自動啟用。. 不過，視您的產品而定 ...

Find settings in Windows. Find your Windows settings in a snap! Select the Start button, then select Settings . From there, browse the categories or use search to find what you're looking for. Most apps have their own settings. In the app, select Settings to make app-specific changes. Learn how to make Windows easier to see and easier to hear .