AWA: AA: 这个貌似以前的太太乐没有 Food for Thought是一家locally owned bookstore which focus on selling cooking books. FT的经营一直不错,除了销售美食书籍,它提供in-store cooking demonstration by local chef. 为了进一步促进FT的销售,FTshould employ the strategy used by major chains of bookstore and internet book-sellers. The strategy is to provide no-profit discount on FT’s best-seller, thus more customers would know FT and FT’s sale would increase. 而且为了弥补best-seller的折扣带来的损失,FT应该取消in-store cooking demonstration来减少开支。
AI: In order to preserve national security, the government could keep in secret any information as they wish.
数学:碰到的稍有难度一点的题CD基本都有了,补两个我印象比较清晰的吧: 1. 副作用和疗效的题:at least 10% of people have side effect, and 60% of people who have improvement have side effect. Are there more people who have side effect than people have improvement
90% people who have side effect also have improvement. 不记得了 2.题目的图见帖子图片附件。两个圆,互相相切并都与坐标轴相切。绿色的半径长为4,粉色的半径长为6,求两个圆心的连线的斜率。