采用高强度轻材料，可提高汽车燃油经济性。
压缩比
在PowerPoint演示文稿中，设计“自定义动画”的作用是（）。 ["设置当前幻灯片的动画方式","设置当前幻灯片的切换方式","设置当前幻灯片的放映方式","设置当前幻灯片的动画预览方式"]
You can control instance recover performance by setting parameters to define targets for（） ["The size of the redo buffer in SGA. ","The instance that will perform recovery in Real Application Cluster database. ","The number of blocks to be read during instance recovery, or the time needed to complete instance recovery. ","The number of passes through the redo logs made by the recovery process to identify blocks needing recovery."]
什么叫采油速度？
条件发射
