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 install Authenticator on your iOS device. Scan the QR code. or download and install Authenticator from the Apple app store. Get the app

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Tip: If you don't see the SharePoint app under All apps, use the Search box near the top of the window to search for SharePoint. For more information, see Where to sign in to Microsoft 365 . Note: Images in this Quick Start depict the Modern experience unless otherwise indicated.

如果这是你第一次安装 Microsoft 365，则可能需要先执行一些设置步骤。展开下面的 “了解详细信息”部分。 但是如果是重新安装 Microsoft 365，且已兑换了产品密钥并拥有与 Microsoft 365 相关联的帐户，请转到“登录并安装 Office”的部分。

Check the Xbox services, games, and apps for any service outages.

In the search box on the taskbar, type device manager, then select Device Manager from the menu.

Note: The best and safest way to get driver updates in Windows is always through Windows Update.If you are having problems with Windows Update, you might see if any of the links at Update Windows can help you out first.

Um Unterstützung in Outlook.com zu erhalten, klicken Sie hier, oder wählen Sie in der Menüleiste Hilfe- aus, und geben Sie Ihre Abfrage ein. Wenn ihr Problem durch die Selbsthilfe nicht behoben werden kann, scrollen Sie nach unten zu Benötigen Sie weitere Hilfe? und wählen Sie Ja aus.. Um uns in Outlook.com zu kontaktieren, müssen Sie sich anmelden.

Microsoft Rewards points don’t have any cash value. It usually takes about 5,000 points to redeem something worth $5. Learn more about redeeming Microsoft Rewards points. Microsoft Rewards points will expire if there are no earning activities within 18 months.