题目

 -I'm out of breath. I can't go any further.    -_______! I'm sure you can make it.     A. No problem     B. What a pity    C. Not bad          D. Come on 答案:D若A(-4,y1),B(-1,y2),2),C(3,y3)为二次函数y=x2+4x-5的图象上的三点,则y1,y2,y3的大小关系是( )A.y1<y2<y3B.y2<yl<y3C.y3<yl<y2D.y1<y3<y2
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