方程x2-3x=0的解是______.
原式为x2-3x=0,x(x-3)=0,x=0或x-3=0,x1=0,x2=3.
∴方程x2-3x=0的解是x1=0,x2=3.
When I returned to the hotel, I was too excited to go to sleep. I lay awake and thought about New York.
唐代否定了按门第选官的九品中正制及等额推荐的察举制,实行分科考试、差额录取的科举制,这反映出唐代()
A.官员特权受到否定
B.君主集权得到强化
C.选才注重知识水平
D.选官重视思想品德