蒙版是用来保护图像的，所以在蒙版上不能执行绘画、滤镜、渐变填充等操作。
斯塔夫里阿诺斯《全球通史》：“事实上，20世纪80年代戈尔巴乔夫的改革可以说与20世纪30年代罗斯福总统的新政很相似。”俄罗斯有关组织民调显示，认为戈尔巴乔夫改革与苏联解体有密切关系的2011年为42%，2013年为31%。这说明（）。 阶级立场影响对历史的评判。 全球史观能客观公正评价历史。 史学家专著更接近历史真实。 认识角度会影响对历史的评判。
You are a network administrator for Litware， Inc. The company’s main office is located in Lima， and branch offices are located in five other cities. The network consists of a single DNS domain named litwareinc.com. The network configuration is shown in the exhibit. （Click the Exhibit button.） All network servers run Windows Server 2003. All client computer IP addresses are assigned by using a DHCP server that is located in each office. Client computers are reimaged often and are assigned new names each time they are reimaged. All client computers are configured to reference their local DNS server as the preferred DNS server and to reference the central DNS server as the alternate DNS server.A primary zone for litwareinc.com is configured on a server in the Lima office. Secondary zones are configured on a server in each branch office. The retry interval， the refresh interval， the expiration interval， and the default minimum Time to Live （TTL） interval are configured with the default settings.Network bandwidth utilization averages 40 percent. The network connection between the Lima office and the Bogota office fails an average of twice per day.Users in the Bogota office occasionally receive incorrect responses to queries against the local DNS server when the network connection is interrupted during a zone transfer. You need to change the configuration of the start of authority （SOA） resource record for litwareinc.com. In addition， you need to reduce the possibility that users can query local DNS zones before successful zone transfers occur. What should you do？（） Change the retry interval to 12 hours.。 Change the default minimum Time to Live(TTL) to 2 days.。 Change the refresh interval to 2 days.。 Change the expiration interval to 12 hours.。
All servers on your companys network run Windows Server 2008 R2. All client computers run Windows Vista. The company is planning to virtualize an application that runs only on Windows 2000 Professional. You need to recommend a virtualization solution that enables users to run the virtualized application while their computers are disconnected from the corporate network. Which technology should you recommend？（） Remote Desktop Services （RDS）。 Microsoft Application Virtualization （App-V）。 Microsoft Virtual Desktop Infrastructure （VDI）。 Microsoft Enterprise Desktop Virtualization （MED-V）。
简述色彩3个基本属性之间的基本关系。
变速器验收时各密封部位不得漏油，润滑油温度不得越过室温（）℃。
