题目

阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。 Last year, I was invited to participate in acarnival for Tuesday's Child, an organization that helps children with AIDS. All the children that hadgathered at one particular room could 1 a squareon a piece of cloth. Later the squares would be sewn(缝) together to2a quilt. The quilt would be 3 to a man who had 4 hislife to the 5 and would soon be retiring. The kids were given paintsin bright colors and asked to paint something6would make the quilt 7.As I looked around at 某售报亭每天以每份0.6元的价格从报社购进若干份报纸，然后以每份1元的价格出售，如果当天卖不完，剩下的报纸以每份0.1元的价格卖给废品收购站．（1）若售报亭一天购进280份报纸，求当天的利润y（单位：元）关于当天需求量x的函数关系解析式；（2）售报亭记录了100天报纸的日需求量，整理得下表：日需求量x240250260270280290300频数10201616151310①假设售报亭在这100天内每天都购进280份报纸，求这100天的日平均利润；②若售报亭一天购进280份报纸，以100天记录的各需求量的频率作为各销售发生的概率，求当天的利润不超过100元的概率．