方程(x-1)(x-2)=0的两根为x1,x2,且x1>x2,则x1-2x2=( )。
0
- Are they soccer with the school team on Wednesday?
- No, they have to go to a party.
A.played
B.playing
C.play
D.to play
“单单一致”的纵审时,以( )为中心。
A.保险单 B.商业发票 C.海运提单 D.装箱单