若将C盘某文件夹下的一批文件复制到D盘某文件夹下，在Windows资源管理器中将鼠标指针指向所选定的文件，拖动鼠标将其移动到目的文件夹上并（）。 ["同时按住Alt键","同时按住Shift键","同时按住Tab键","不要按任何键"]
如何清除分解设备的结疤？
Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?（） ["To prevent internal damage form local overheating","To ensure the fuel nozzles are flushed clean","To clear the smoke stack","To let the waste heat boiler reduce its rate of steam generatio"]
The period of a lighted aid to navigation refers to the（）. ["date of construction or establishment","length of time between flashes of the light","time required for the longest flash of each cycle","time required for the light to complete each cycle"]
一般燃气行业客服中心排班表在施行后，在不影响业务情况下，可以申请临时（）。 ["休班","串班","旷工","修改排班表"]
分解槽结疤是怎么形成的？
