开口向下的抛物线y=(m2﹣2)x2+2mx+1的对称轴经过点(﹣1,3),则m=( )
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大米蛋白的营养品质体现在哪里?
I don’t understand _________ that everything’s fine when it’s not.
A.how can he say
B.can he say how
C.he can say how
D.how he can say