CHAPTER 4 Stacks and Queues SI The stack adt 1. ADT A stack is a Last-In-First-Out(LIFO)list, that is. an ordered list in which insertions and deletions are made at the top only Objects: A finite ordered list with zero or more elements
Unit siⅸ Text A I. Pre-Reading Task 1. What makes human beings different from animals? A. The ability to use tools. B. The learning and sharing of behavior . The use of language. 2. Do you think animals have a culture? If yes, give an example
NEW WORDS AND PHRASES personalize[pa: sanal a iz]v.使个人化 convenient[kan'vi: n an t]a.便利的,方便的 rapidity[ra' p i d i t i]n.快,迅速 severe[si'via]a.严格的,严重的 estrict[ris' trik t]v.限制,约束 vary[' v Ear I]v.改变,变化,不同