∴a=±8,b=±6,
∵|a﹣b|=b﹣a,
∴a﹣b≤0,
∴a≤b,
∴a=﹣8,b=﹣6,则a+b=﹣14,
a=﹣8,b=6,a+b=﹣2
将一物块放置在固定的斜面上,物块恰能沿斜面匀速下滑,则下滑过程中物块的机械能将____(“减小”或“增加”),物块的内能将____.
— Where does your aunt work?
— She works a farm.