Your company has an Active Directory forest that contains client computers that run Windows Vista and Microsoft Windows XP. You need to ensure that users are able to install approved application updates on their computers. Which two actions should you perform（） ["Set up Automatic Updates through Control Panel on the client computers","Create a GPO and link it to the Domain Controllers organizational unit. Configure the GPO to automatically search for updates on the Microsoft Update site.","Create a GPO and link it to the domain. Configure the GPO to direct the client computers to the Microsoft WSUS server for approved updates.","Install the Microsoft WSUS application on a server in the environment. Configure the server to search for new updates on the Internet. Approve all required updates."]
引起导体和电器发热的原因是什么？
（）被视为继报纸、广播和电视之后的“第四媒介”。
在民族关系中，忽视民族特点和民族差异，是（）。 ["违背民族发展规律的一种错误倾向","消除民族隔阂的有效措施","防止民族分离主义蔓延的必要手段","增加各民族之间共同性的基本途径"]
结构变动模型对于领会经济发展过程有什么意义？为什么说发展中国家经济发展过程中经常会受到结构性矛盾的困扰？请举例说明。
种间关系是第二类影响种群动态的因素。种间关系主要包括（）、（）和（）。
