A:x(x﹣1)+2<0
B:2(1﹣y)+y>2
C:2x<1
D:x﹣2y≥0
This camera is too expensive. I'd like a one.
物理学中引入“质点”概念,从科学方法来说,是属于( )
“黄袍加身”的典故与哪一位皇帝有关( )