题目

如果每盒圆珠笔有12枝,售价18元,那么圆珠笔的销售额y(元)与圆珠笔的销售枝数x之间的函数关系式是( ) A . y= x B . y= x C . y=12x D . y= x 答案:A3.What does the man want to buy?A.Some new pens.B.Some new books.C.Some New Year's cards.
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