问题 单项选择题

下列关于数字签名的描述中,错误的是 (10)

A.签名必须能被第三方证实

B.签名时必须能对内容进行鉴别

C.必须能证实收发双方的签名

D.必须能证实签名的日期和时间

答案

参考答案:C

解析:[要点解析] 数字签名是笔迹签名的模拟,它必须具有的性质是:①必须能证实作者签名及签名的日期和时间;②在签名时必须能对内容进行鉴别;③签名必须能被第三方证实以解决争端。数字签名并不具有证实接收方信息是否真实的功能。

单项选择题
阅读理解

Anyone who cares about what schools and colleges teach and how their students learn will be interested in the memoir(回忆录)of Ralph W. Tyler who is one of the most famous men in American education.

Born in Chicago in 1902, brought up and schooled in Nebraska, the 19-year-old college graduate Ralph Tyler became hooked on teaching while teaching as a science teacher in South Dakota and changed his major from medicine to education.

Graduate work at the University of Chicago found him connected with honorable educators Charles Judd and W. W. Charters, whose ideas of teaching and testing had an effect on his later work. In 1927, he became a teacher of Ohio State University where he further developed a new method of testing.

Tyler became well-known nationality in 1938, when he carried his work with the Eight-Year Study from Ohio State University to the University of Chicago at the invitation of Robert Hutchins.

Tyler was the first director of the Center for Advanced Study in the Behavioral Sciences at Stanford, a position he held for fourteen years. There, he firmly believed that researchers should be free to seek an independent spirit in their work.

Although Tyler officially retired in 1967, he never actually retired. He served on a long list of educational organizations in the United States and abroad. Even in his 80s he traveled across the country to advise teachers and management people on how to set objectives(目标) that develop the best teaching and learning within their schools.

6. Who are most probably interested in Ralph W. Tyler’s memoir?

A. Top managers.   B. Language learners.

C. Serious educators.   D. Science organizations.

7. The words “hooked oh teaching” underlined in Paragraph 2 probably mean ________.

A. attracted to teaching                            B. tired of teaching

C. satisfied with teaching                    D. unhappy about teaching

8. Where did Tyler work as the leader of a research center for over 10 years?

A. The University of Chicago.                B. Stanford University.

C. Ohio State University.                    D. Nebraska University.

9. Tyler is said to have never actually retired because ________.

A. he developed a new method of testing    

B. he called for free spirit in research

C. he was still active in giving advice      

D. he still led the Eight-Year Study

10. What cannot we learn about Ralph W. Tyler in this article?

A. When and where he was born.

B. Where he studied and worked.

C. His devotion to American education.

D. His life with his family.