电子显微镜使用的电子源有两类：
Given： What is the result？（） ["Mr. John Doe","An exception is thrown at runtime.","Compilation fails because of an error in line 12.","Compilation fails because of an error in line 15.","Compilation fails because of an error in line 20."]
以沥青混凝土、钢筋混凝土或其他人工材料为防渗体的坝称为（）。 ["A、均质坝 ","B、土质防渗体坝 ","C、非土料防渗体坝 ","D、黏土心墙坝"]
藻类营养繁殖的基本形式。
You are planning a Windows 7 deployment infrastructure. You have the following requirements： Enable network deployments of WIM images or VHDs. Support multicast with the use of multiple stream transfer functionality. Allow drivers to be stored centrally，and use dynamic driver provisioning. You need to design an infrastructure that meets the requirements. Which deployment method should you recommend？（） ["Microsoft Deployment Toolkit （MDT） 2008","Microsoft Deployment Toolkit （MDT） 2010","Deployment Image Servicing and Management （DISM）","Windows Deployment Services in Windows Server 2008 R2"]
事件驱动程序主要包含事件、对象和（）三个要素。
