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设栈S和队列Q的初始状态为空，元素e1、e2、e3、e4、s5和e6依次通过栈S，一个元素出栈后即进入队列Q，若6个元素出队的顺序是e2、e4、e3、e6、e5、e1则栈S的容量至少应是【３】。

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Questions 11 ～ 13 are based on the following conversation between a patient and a doctor. You now have 15 seconds to read Questions 11 ～ 13. How does the man feel

A. Sick.
B. Dizzy.
C. Exhausted and weak.
D. Painful.

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Questions 14～16 are based on the talk. You now have 15 seconds to read Questions 14～16. What is the most common type of computer network used in companies

A. The databases of information.
B. The public access networks.
C. The super computer networks.
D. Intranets.

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下面程序的运行结果为【９】。 x＝-2．3 y=125 z=Len(Str$(x)＋Str$(y)) Print Z

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Questions 14～16 are based on the talk. You now have 15 seconds to read Questions 14～16. Which of the following is true about the Internet according to the talk

A. The Internet is different from television in which it’s more convenient.
B. The Internet may greatly affect the ways of college education and business.
C. The Internet is the cheapest way of communication with other people.
D. The Internet is composed of many computers.

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