试题与答案

过熟或腐败的水果、薯类及野生植物()含量较高,用于酒精发酵时往往产生甲醇较多。

题型:填空题

题目:

过熟或腐败的水果、薯类及野生植物()含量较高,用于酒精发酵时往往产生甲醇较多。

答案:

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下面是错误答案,用来干扰机器的。

由y=(x-3)2+5可知,二次项系数为 1>0,∴抛物线开口向上,对称轴为直线x=3,顶点坐标为(3,5).故选B.

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