LEFT, LEFTB functions - Microsoft Support
Syntax. LEFT (text, [num_chars]) LEFTB (text, [num_bytes]) The function syntax has the following arguments: Text Required. The text string that contains the characters you want to extract. Num_chars Optional. Specifies the number of characters you want LEFT to extract. Num_chars must be greater than or equal to zero.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
下载 Microsoft Authenticator - Microsoft 支持
在 Android 设备上安装 Authenticator. Google Play 商店在中国不可用，因此只能从以下商店下载 Microsoft Authenticator：. 注意: 我们会尽量使所有应用商店版本保持最新状态，但 Microsoft 不对其他站点上提供的版本负责。.
Keyboard shortcuts in Excel - Microsoft Support
To do this. Press. Move to the Tell me or Search field on the ribbon and type a search term for assistance or Help content.. Alt+Q, then enter the search term. Open the File menu.. Alt+F. Open the Home tab and format text and numbers and use the Find tool.. Alt+H. Open the Insert tab and insert PivotTables, charts, add-ins, Sparklines, pictures, shapes, headers, or text boxes.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016, Excel for iPad, Excel for iPhone, Excel for Android tablets, Excel for Android phones, Excel Mobile
使用系统文件检查器工具修复丢失或损坏的系统文件 - Microsoft 支持
如果运行的是 Windows 10、Windows 8.1 或 Windows 8，请先运行收件箱部署映像服务和管理 (DISM) 工具，然后再运行系统文件检查器。. (如果运行的是 Windows 7 或 Windows Vista，请跳到步骤 3.) 键入以下命令，然后按 Enter： 完成命令操作可能需要几分钟时间。. DISM.exe /Online ...
在電腦上啟用 TPM 2.0 - Microsoft 支援服務
如果您能夠啟用 TPM，請完成下一個步驟以確認它是 TPM 2.0。. 如果您在 [ 安全處理器] 底下看到 安全處理器詳細資料 的選項，請選取該選項，並確認您的 規格版本 是 2.0。. 如果小於 2.0，表示您的裝置不符合Windows 11需求。. 選項 2：使用 Microsoft Management Console. 按 ...
How to sign in to or out of Outlook.com - Microsoft Support
To sign out, go to Outlook.com. Select your account initials or account picture at the top corner of your Inbox. Select Sign out. Tips: If you don't see your picture at the top of screen, check to see if ad blocking is turned on. Sometimes this prevents the picture from showing. If you don't see see Profile or Account options, you can access ...
Applies To:
Outlook.com
SUMPRODUCT 函数 - Microsoft 支持
此处的公式为：=SUMPRODUCT ( (B2：B9=B12) * (C2：C9=C12) *D2：D9) 。 它首先将 East 的出现次数乘以匹配的樱桃出现次数。 最后，它会对 Sales 列中相应行的值求和。 若要查看 Excel 如何计算此公式，请选择公式单元格，然后转到 公式 > 计算公式 > 计算。 需要更多帮助吗？
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
Fonction SI – Utiliser des formules imbriquées et éviter les pièges
Plusieurs fonctions SI peuvent être imbriquées pour utiliser plusieurs critères. L’instruction de la fonction Excel SI permet d’effectuer une comparaison logique entre une valeur et une hypothèse en testant une condition et en renvoyant un résultat Vrai ou Faux.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016, Excel Web App, Excel for Windows Phone 10
Download Microsoft Authenticator - Microsoft Support
To install Authenticator on your Android device. Scan the QR code. or download and install Authenticator from the Google Play store. Get the app.
Save or forget passwords in Microsoft Edge - Microsoft Support
Turn password saving on or off. Select Settings and more > Settings . Select Profiles > Passwords > Settings . Under Passwords, set Offer to save passwords to On or Off as desired. Note: Turning off password saving doesn't delete previously saved passwords.