1.夏季炎热，更多的人喜欢吃冰淇淋，春秋冬三季相对而言，吃的人较少。儿童爱吃冰淇淋，但是家长可能不会让吃太多，所以青年群体吃冰淇淋较多，年纪越大，吃的越少。早晚温度较低，吃冰淇淋的人较少，中午到下午一段时间，温度高天气炎热，吃冰淇淋的人更多，达到峰值。
第二次上课后的作业：W5L2-产品生命周期2.文章主旨Product Life Cycle Stages Explained.The product life cycle has 4 very clearly defined stages, each with its own characteristics that mean different things for business that are trying to manage the life cycle of their particular products.
关键词：life cycle,Introduction Stage,Growth Stage,Maturity Stage, Decline Stage