关于CSS样式滤镜中（）是设置透明度的。
基础研究
你有一台运行Win 7的计算机，你运行配置备份向导，如图所示：你要确认你可以备份计算机到一个本地磁盘驱动器上。在运行配置备份向导之前你应该做什么？（） ["连接到一个可移动磁盘","以管理员登录","启用卷影副本服务","将你的用户账户加入到Backup Operators组中"]
在用工业管道定期检验类别包括（）两种。 ["耐压试验","日常检查","在线检验和全面检验","无损探伤"]
Your network contains a Windows Server Update Services (WSUS) server.You have an organizational unit (OU) named Sales. The Sales OU contains all of the computer objects for the sales department. You enable client-side targeting for the Sales OU and set the target group name to Sales-Computers.You restart a sales computer.You discover that the computer is not added to the Sales-Computer computer group in WSUS.You need to ensure that all sales computers are added to the Sales-Computers group. Which options should you configure?（） [" Automatic Approvals"," Computers"," Personalization"," Products and Classificatio"]
活性酸度
