如图,一次函数y=kx+b(k≠0)的图象与反比例函数y= mx (m≠0)的图象相交于A、B两点.
A: were you five years ago? B: I was in Beijing.
观察在0.3 g/mL蔗糖溶液中的洋葱表皮细胞,发现中央液泡逐渐变小,说明 ( )