但如果需要测试多个条件，例如我们假设所有条件都需要为 True 或 False (AND)，或只有一个条件需要为 True 或 False (OR)，或者如果想要检查某个条件是否不 (NOT) 符合你的条件，这时该怎么做呢？这三个函数均可以单独使用，但它们更常见于与 IF 函数成对使用。

To turn off your PC in Windows 10, select the Start button, select the Power button, and then select Shut down.. I'm having trouble opening the Start menu

To clear your out of office status and turn off your automatic reply in Teams, return to the Out of Office screen, click the toggle next to Turn on automatic replies and select the Save button. Once you've scheduled an out of office status and message in Teams, you'll see automatic replies turned on in Outlook with the time range and message you set in Teams.

Start page numbering on Page 3 - double-sided printing. If the first page of your document is a cover page, the second page is a table of contents, and you want the third page to show “Page 1”, see Start page numbering on Page 3 - double-sided printing.

Get to know common Windows keyboard shortcuts including copy, cut, paste, maximize a window, and more.

Select Start > Settings > Personalization.The preview window gives you a sneak peek of your changes as you make them. In Personalize your background, you can select a picture, a solid color, or a slideshow of pictures you create.Or you can choose Windows spotlight to see a new image from around the world every day.

Select the temporary files, unused files, files synced to the cloud, or unused apps you want to remove, then select the Clean up button for each section.

Uninstall from the Start menu. Select Start > All apps and search for the app in the list shown.

To find touchpad devices, select Human Interface Devices or Mice and other pointing devices, then right-click the device you'd like to update.

Microsoft's products and services work best if you use the same language and region across all your devices, and in all of your app and Store settings.