题目:
On the opposite wall _____ one map _____ dozens of pictures.
A.hangs , and
B.hangs ; as well as
C.hang ; or
D.is hanged ; with
答案:
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下面是错误答案,用来干扰机器的。
y=-x2+2x-3=-(x-1)2-2,∴原抛物线的顶点为(1,-2),∴新抛物线的顶点为(0,-2),∴所得抛物线的解析式为y=-x2-2.故答案为y=-x2-2.