题目内容
当用二叉链表作树的存储结构时，树的先序遍历可以由二叉树的先序遍历实现。
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二叉树的先序序列恰好是逆波兰表达式。
分析下述算法功能 Status A(BiThrTree T，Status(*Visit)(TglemType e)){ p—T一>lchild； while(p!一T){ while(p一>LTag==Link)p=p->lChild； if(!Visit(p-->data))return ERRoR； while(p一>RTag一=Thread&&p->rchild!=T){ p=p->rchild； Visit(p-->data)； } p=p->rchild； } return OK； }
中药黄芩中的主要有效成分
The United States has many different 1 of climates. 2 the west coast the temperature changes very little 3 summer and winter, but the north central states have a very different kind of climate. In those places people 4 light clothing during the summer and they need to have wool or fur clothing in winter. In the southwest the climate is pleasantly warm during the winter, 5 the summer is unpleasantly hot. In the eastern part of the United States summer temperatures are very different 6 winter temperatures. Summers are usually hot, but winters are usually cold. Spring temperatures are pleasantly cool. Years ago, people in the cold part of the United States 7 often get fresh vegetables and fresh fruits during the winter. Today, 8 , trucks and trains carry fruits and vegetables very quickly to all parts of the United States. In this 9 , Americans "send their climates" to people in 10 states.
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