问题 单项选择题

将实验犬的肾切除,并给输入或饲喂氨基酸,血中尿素含量明显升高;若将实验犬的肝切除,则血中氨及氨基酸含量明显升高;若将该犬的肝、肾同时切除,则血中尿素的含量可维持在较低水平,而血氨浓度明显增高。这些实验证明合成尿素的最主要器官是

A.肾

B.脑

C.肠道

D.肝

E.肌肉

答案

参考答案:D

阅读理解

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 19yearold 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 wellknown nationality in 1938, when he carried his work with the EightYear 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.

1. Who are most probably interested in Ralph W. Tyler's memoir?

A. Top managers.      

B. Language learners.

C. Serious educators.

D. Science organizations.

2. The words "hooked on teaching" underlined in Paragraph 2 probably mean ________.

A. attracted to teaching  

B. tired of teaching

C. satisfied with teaching

D. unhappy about teaching

3. 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.

4. 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 EightYear Study

5. What can NOT 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.

单项选择题