将紫色洋葱表皮细胞放在0.3g/mL的蔗糖溶液中,显微镜下不可能观察到的现象是( )
A:液泡缩小
B:细胞壁与原生质层分离
C:液泡颜色变浅
D:细胞核位于原生质层内
People ______ drive after drinking wine or beer according to the new laws.