粗镗（扩）→半精镗→精镗→浮动镗工件内孔表面的表面粗糙度为（）。 ["8.7","0.63—1.25","49","8.8"]
运行中的电压互感器严重缺油有何危害？
电梯设备维护保养日检至少应检查下列项目（）。 ["运行、制动等操作指令是否有效","运行是否正常，有无异常的振动或者噪声","门联锁开关及安全带等是否完好（当有这些装置时）。检查应当做详细记录，并存档备查","控制电路与电气元件是否正常"]
You install Microsoft Windows Vista on a new computer. The computer has the following hardware configuration： 2.4-GHz processor 2 GB of RAM 512-MB video adapter 250-GB hard disk. You are unable to view the following features of Windows Vista： Thumbnails Previews on folders Transparent glass. You need to be able to view the advanced visual features of Windows Vista. What should you do？（） ["Press the ALT key and the TAB key simultaneously.","Press the WINDOWS key and the TAB key simultaneously.","Configure the system properties to optimize for applications.","Configure the system properties to optimize for best appearance."]
在烧结普通砖的砌筑方法里，采用（）砌筑时，铺浆长度不得超过mm。 ["“三一”砌筑法","挤浆法","刮浆法","满口灰法"]
固溶体
