有两个调整压力分别为3MPa和5MPa的顺序阀串联在液压泵的出口，泵的出口压力为（） 2MPa。 3MPa。 5MPa。 8MPa。
根据楞次定律判断，当线圈中的磁通减小时，感应电流的磁通与原磁通的方向（）。 相反。 相同。 垂直。 平行。
You are decommissioning domain controllers that hold all forest-wide operations master roles. You need to transfer all forest-wide operations master roles to another domain controller. Which two roles should you transfer（） RID master。 PDC emulator。 Schema master。 Infrastructure master。 Domain naming master。
简述局域网的主要特点。
乡镇安监站工作人员有哪些特殊要求？
You design a SQL Server 2008 Reporting Services （SSRS） solution. You create a report by using Microsoft Visual Studio .NET 2008. The report contains the following components： A dataset named Customer that lists all active customers and their details. The dataset accepts no parameters. A dataset named SalesHistory that lists all sales transactions for a specified time period and accepts year and month as parameters. You need to ensure that a summary of sales transactions is displayed for each customer after the customer details. Which component should you add to the report？ （）
