I don't know when I s____last night.
关于溶酶体和液泡这两种细胞器的说法,不正确的是( )
如图,抛物线y=ax2+bx﹣5(a≠0)经过点A(4,﹣5),与x轴的负半轴交于点B,与y轴交于点C,且OC=5OB,抛物线的顶点为点D.
设复数z满足1-iz=2i,则z=( )