既使有向无环图的拓扑序列唯一，也不能唯一确定该图。
查看答案
AOV网的含义是以边表示活动的网。
A. 对
B. 错
当改变网上某一关键路径上任一关键活动后，必将产生不同的关键路径。
A. 对
B. 错
下列哪句话是分裂句?
A. It is a piece of good news.
B. It is important for you to communicate with your child.
C. It is Tom who saved the girl.
D. It is a little girl.
- What did Tom give Mary as a Christmas gift? -
A. He gave a book to her.
B. He gave her a book.
C. Tom gave a book.
D. Tom gave a book to Mary.
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