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问题:
[多选] 关于图层蒙板,以下说法正确的是()
A . 蒙板相当于一个8位灰阶的Alpha通道
B . 在蒙板中,黑色表示全部遮住,白色表示全部显示
C . 在蒙板中,白色表示全部遮住,黑色表示全部显示
D . 蒙板中只有黑白二色来表示选区遮挡关系,没有其它灰度颜色
. You have a server that runs Windows Server 2003 Service Pack 2 (SP2). You back up the files on the server by using the following schedule: ·Full backup every Sunday ·Differential backup at 01:00 every Monday to Friday You want to restore the version of a file stored on the server at the start of the business day on Wednesday. You are unsure when the file was last modified. You need to restore the appropriate version of the file by using the minimum number of tapes. Which backup jobs should you review to locate the correct version of the file? () the differential backup from Tuesday。 the differential backup from Wednesday and then the full backup from Sunday。 the full backup from Sunday。 the full backup from Sunday and then all other backu。
在测算人、料、机消耗量时,若为编制招标控制价则一般参照的定额为() 消耗量定额。 施工定额。 企业定额。 预算定额。
成功与失败相互依存相互对立而存在的,在一定条件下可以相互转化。
You work as a Web Developer at Certkiller.com. Certkiller.com makes use of Microsoft ASP.NET3.5. You use this application to create a Web site. The following code exists in a file in the App_Code folder: namespaceCertkiller.Providers { public class SessionSiteMapProvider : SiteMapProvider { // Members omitted for brevity } } You want to make sure that the SiteMapDataSource controls use the SessionSiteMapProviderclass by default. You decide to make changes to the Web.config file. Which configuration sectionshould you use?() A。 B。 C。 D。
某公司的投资组合中有五种股票,所占比例分别为30%、20%、20%、15%、15%;其β系数分别为0.8、1、1.4、1.5、1.7;平均风险股票的必要收益率为15%,无风险收益率为6%。试求该投资组合的综合β系数和预计收益率。
关于图层蒙板,以下说法正确的是()