bottom在1.5的题目里老师讲因为使用历史数据“cost of goods sold to decline 0.5 annually"所以又bottom up.
令我不理解的是111页1.3在判断B是否是韩游bottom up 成分里,题干里说“ B sales will grow at the same rate as nominal as GDP ,BUT CHROME will have a 2 percentage point decline in market share".如果按照1.5题目历史数据也是bottom,那么1.3 CHORME(B)用了历史数据,B应该有bottom 的用法。
这个bottom 让我听不理解的