Which Coherence caching pattern matches the sequence of events ？（） 1. Data is requested from cache 2. The requested data does not exist in the cache （cache miss） 3. The Coherence cache store is used to red data from the back-end persistent data source， and placed in ther cache 4. Data requested from the cache is returned to the caller [" read through"," write through"," refresh ahead"," write behind"]
电压互感器二次回路三相失压，必须停用（）。 ["高频保护","距离保护","低压闭锁过电流保护"]
下列变速箱，有超速档变速箱的是（） ["HW20716","HW19712","HW15710","HW19710","HW13710"]
Which three statements describe the functionality of the DO_KEY built-in?（） ["It accepts both a built-in and a key name as argument. ","If no key trigger is defined, the specified built-in executes. ","Its parameter must be specified in upper case, enclosed in single quotation marks. ","It performs the same task as if you pressed the function key associated with the specified argument. ","It executes the key trigger that corresponds to the built-in specified as its parameter.&e"]
浇筑混凝土前主要检查（）。 ["钢筋的规格、数量","钢筋合格证和试验报告","钢筋位臵、接头是否正确","检查隐蔽记录"]
你如何理解OpenDialog（打开文件对话框）和SaveDialog（保存文件对话框）这两个组件的基本功能？它们负责文件的打开和保存吗？
