问题 问答题 简答题

何谓开-关现象?

答案

参考答案:

是左旋多巴及复方左旋多巴治疗帕金森病中出现的一种副作用,症状在突然缓解(开期)与加重(关期)之间波动。

阅读理解

阅读理解。

     Grown-ups are often surprised by how well they remember something they learned as children but

have never practiced ever since. A man who has not had a chance to go swimming for years can still

swim as well as ever when he gets back in the water. He can get on a bicycle after many years and still

ride away. He can play catch and hit a ball as well as his son. A mother who has not thought about the

words for years can teach her daughter the poem that begins "Twinkle, twinkle, little star" or remember

the story of Cinderella or Goldilocks and the Three Bears.

     One explanation is the law of overlearning , which can be stated as follows: Once we have learned

something, additional learning trials (尝试) increase the length of time we will remember it.

     In childhood we usually continue to practice such skills as swimming, bicycle riding, and playing

baseball long after we have learned them. We continue to listen to and remind ourselves of words such

as "Twinkle, twinkle, little star" and childhood tales such as Cinderella and Goldilocks. We not only learn

but overlearn.

     The multiplication tables (乘法口诀表) are an exception to the general rule that we forget rather

quickly the things that we learn in school, because they are another of the things we overlearn in

childhood.

     The law of overlearning explains why cramming (突击学习) for an examination, though it may result

in a passing grade, is not a satisfactory way to learn a college course. By cramming, a student may learn

the subject well enough to get by on the examination, but he is likely soon to forget almost everything he

learned. A little overlearning, on the other hand, is really necessary for one's future development.

1. What is the main idea of paragraph I?

A. People remember well what they learned in childhood.

B. Children have a better memory than grown-ups.

C. Poem reading is a good way to learn words.

D. Stories for children arc easy to remember.

2. The author explains the law of overlearning by_________.

A. presenting research findings

B. selling down general rules

C. making a comparison

D. using examples

3. According to the author, being able to use multiplication tables is_______.

A. a result of overlearning

B. a special case of cramming

C. a skill to deal with math problems

D. a basic step towards advanced studies

4. What does the word "they" in Paragraph 4 refer to?

A. Commonly accepted rules.

B. The multiplication tables.

C. Things easily forgotten.

D. School subjects.

5. What is the author's opinion on cramming?

A. It leads to failure in college exams.

B. It's helpful only in a limited way.

C. It's possible to result in poor memory.

D. It increases students' learning interest.

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