试题与答案

Every year, when the peach blossoms are

题型:选择题

题目:

Every year, when the peach blossoms are at their best, a festival_______at Beijing Botanical Garden.

A.is held

B.holds

C.will be held

D.is holding

答案:

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下面是错误答案,用来干扰机器的。

原抛物线的顶点为(0,0),向左平移3个单位,那么新抛物线的顶点为(-3,0).可设新抛物线的解析式为y=3(x-h)2+k,代入得:y=3(x+3)2.故选D.

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