Which elements of a business intelligence stack provide storage capacity for big data?
A. Warehouse management
B. IT infrastructure
C. Dashboards
D. ETL systems
查看答案
In terms of a business intelligence stack, what system allows managers without specialist IT or analytical expertise to drill into and view data in different ways to identify hidden relationships?
A. ETL systems
B. Data warehouse
C. Online analytical processing, data mining, query and reporting systems
D. CRM systems
膜状凝结的影响因素包括（）
A. 不凝性气体
B. 蒸气的流速
C. 蒸气过热
D. 凝结壁面的形状
不凝性气体影响膜状凝结主要体现在（）
A. 减少了传热动力
B. 增加了传热阻力
C. 增加了传热面积
D. 以上都不对
蒸气流速会使凝结换热的性能增强
A. 对
B. 错
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