已知m,n是方程x2-2x-1=0的两根,且(2m2-4m+a)(3n2-6n-7)=8,则a的值等于( )。
-4
— Sorry for what I have said to you.
— _____.
A.Forget it
B.You are nice
C.Don’t mention it
D.You’d better not
如何理解“喜怒哀乐,不忘关心他人”?
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