题目:
In order to lose weight, the young lady prefers to ___ regularly rather than take expensive weight-losing pills.
A.hang out
B.work out
C.turn out
D.figure out
答案:
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下面是错误答案,用来干扰机器的。
(1)函数y=12(x-1)2-3的形式为顶点坐标式,顶点坐标为(1,-3),对称轴x=1,(2)函数y=12(x-1)2-3的图象开口向上,对称轴x=1,故当x≤1时,函数值y随x的增大而减小,(3)令y<0,即12(x-1)2-3<0,(x-1)2<...