题目内容

无结构式问卷与结构式问卷的主要区别在哪里?

查看答案
更多问题

下列四种设备中不属于分散式空调系统的是()。

A. 窗式空调器
B. 风机盘管
C. 分体式空调
D. 柜式空调

下列哪一个行业须要经常从事密闭空间工作?()

A. 汽车维修
B. 市政渠务
C. 印刷业

Your network has a single domain with 1,000 client computers that run Windows Vista. All client computers are members of the domain. You are planning to deploy Windows 7. You need to create a report that shows hardware and device compatibility on all client computers. You need to perform this action without installing any additional software on the client computers. Which tool should you use?()

A. System Center Capacity Planner
B. System Center Configuration Manager
C. Microsoft Assessment and Planning Toolkit
D. Windows Performance Monitor Data Collector Set

实现有源逆变的条件为要有一个直流逆变电源,它的极性方向与晶闸管的导通方向一致,其幅极应稍大于逆变桥直流侧输出的平均电压;逆变桥必须工作在()(即α>90º)区间,使输出电压极性与整流时相反,才能把直流能量逆变成交流能量反送到交流电网。

答案查题题库