[多选] 下列哪些方法可以将一幅彩色图像转变为灰度效果？（并不要求一定是灰度颜色模式）（） 

直接分销渠道与间接分销渠道各自的优缺点是什么？ 异食癖 You are creating a custom control. The UI of the control must contain several text boxes and two buttons. The control must be available in the global assembly cache for reuse across multiple Web applications. You need to achieve this functionality by using the minimum amount of code. What should you do? （） Create a control that derives from System.Web.UI.Control.。 Create a control that derives from System.Web.UI.WebControls.CompositeControl.。 Create a control that derives from System.Web.UI.WebControls.WebControl.。 Create a control that derives from System.Web.UI.UserControl.。 You are designing a Windows Azure web application.  All users authenticate by using their Active Directory Domain Services （AD DS） credentials.  You need to recommend an approach for enabling single sign-on for domain-authenticated users.   Which two actions should you recommend？（）  Use Forms authenticationto generate claims.。  Use Active Directory Federation Services （AD FS） to generate claims.。  Use SqlMembershipProvider in the web application.。  Use Windows Identity Foundation in the web application.。 You need to design a patch management strategy for Southbridge Video. Your solution must meet business requirements. What should you do？（） Configure all client computers to use Automatic Updates to obtain security patches from the Windows Update Web site. Test and install all patches。 Configure a batch file to download security patches daily. Distribute the security patches by using a.zap file and the Default Domain Policy Group Policy object （GPO）。 Deploy a Software Update Services （SUS） server. Test all security patches and then approve them. Configure all client computers to automatically obtain updates from the server。 Configure a batch file to download security patches daily. Manually install the security patches on all computer。 下列哪些方法可以将一幅彩色图像转变为灰度效果？（并不要求一定是灰度颜色模式）（）