题目内容

Research on the human brain has been attracting more and more scientists in recent years., just like the booming(昌盛的)hi-tech industry. One of the latest research topics is how to change the human brain or combine the Computer and the human brain, i. e, to transport a chip into human brain. This innovation(改革) may take everyone’s dream come true .If we compare a human brain to a hard disc, what the scientists are doing is to enlarge the applicable capacity of the hard disc. For the time being, there are some difficulties in such transport experiments, but scientist never give up.

Experiments were started on animals .In 1996 , a transplant experiment performed at the Defense and Military Physiology Research institute in the U.S. turned a bear into a dolphin.

The dolphin was named Ted, and the bear was named Tallin. Using the most advanced technology, deep and detailed were made of the swimming action memory area in Ted’s brain by the scientists. They obtained a series of useful information, the signals transferred by the nerve system. Such information was saved into a button—sized chip, which was then transplanted into the action memory area in Tallinn’s brain. The information saved on the chip was released by means of electric power.

Recently, another comprehensive memory transplant was performed at the Motor Never Research Institute of the University of California. The comprehensive memory transplanted in the experiment included actions, moods, logic ,words, images, etc. The experiment involved an entire transplant of the memory area. This was the largest such experiment done so far.

The transplant was performed from a dog named “Genius” to a dog named “idiot”. “genius” could understand and follow up to 100 gestures and orders made by its master. It was a real genius in memorizing .”Idiot” was the younger brother of “Genius”. It had no contact with people at all since its birth. It became an animal with nothing in its brain, without any memory.

The operation was a complete success. When the two dogs woke up .”Idiot” had grasped all the abilities “Genius” possessed; it was good at memorizing , sensible. It could follow every gesture and other given but its master. But :genius” gave no response to its master, and in fact did not recognize him at all.

1.The purpose of the experiment is _______.

A. to combine the computer and the human brain

B. to make bear swim

C. to make some stupid dog turn clever

D. to enlarge the applicable capacity of human brain

2.Which of the following statement is true ?

A .The scientists transferred a button—sized chip with useful information in Tallin’s brain.

B. The comprehensive memory transplant was performed at the Motor Nerve Research University.

C. The second experiment wasn’t an entire transplant of the memory area.

D. The idiot was an animal with memory before brain experiment.

3.What dose the underlined word “success” refer to ?

A. The two dogs woke up.

B. They were both good at at memorizing .

C. The idiot grasped all the abilities .

D. The Genius grasped all the abilities.

4.According to the text, we can infer ______.

A.    a person can know more after the experiment

B. a bear can swim after being transferred a chip with relevant useful information

C. a dog can become clever after entire transplant of the memory area

D. it is really good for animals to have transplant experiment

 

1. 答案D。该题属于主旨大意题。第一段说科学家并没有放弃移植实验,第二段第一句又说实验是从动物开始的,由此可见,实验的目的最终还是针对人。

2. 答案A。该题属于事实细节题。选项B中地点应是Motor Never Research Institute of University of California ;文中明确指出这次实验是一次记忆区域的完全移植,故选项C错误;选项中的“idiot”指的是狗“Genius”。

3. 答案C。该题属于词句释义题。由最后臆断可知,第二个实验的目的是让小狗 “idiot”被植入芯片或变聪明。故正确答案是C。

4. 答案B。该题属于判断推理题。由文中的实验得知,当有用的信息芯片被完全移植到某一动物脑中时,可使动物具备与相关信息有用的功能。因此,B为正确答案。

 

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College libraries are designed primarily for research and study.To explain its use, let us choose a research topic and follow the step-by-step procedure of looking up the material for the paper.

       Suppose your assignment is to write a paper on a novel called “The Sun Also Rises” by American writer Hemingway.The first step is to go to the main catalog.Many small drawers on the large wooden cabinets are lined up in alphabetical(字母的) order.Each of the drawers contains hundreds of alphabetical ordered cards.These cards are printed references to all material available in the library.Title cards are cataloged (为…编目录 ) by the first word of the book title, leaving out the articles like “a”, “an” and “the”.And then you get the cards for the books you need.On the upper left corner of each card is the call number.This is the numerical code that shows where the book is located in the library.The library has open and closed stacks.If your book is on the open stacks, you can go to the open-stack room, and according to the call number find it out by yourself.There are only about 30,000 books on open stacks, while most of the 800,000 books in our library are kept in closed stacks, which are accessible only to teachers and graduate students.

       For undergraduates like you, borrowing books from the closed stacks have to be done with the help of our librarian.In that case, you must fill out a call slip(纸条) for the book, showing the call number, author and title.You can get call slips on tables near the catalog cabinets.You show your call slip together with your library card to a librarian at the information desk.He or she will help you find the book out in the closed stacks.

What is the main purpose of this text?

       A.To present readers a brief introduction to a college library.

       B.To guide readers how to find books needed in a college library.

       C.To tell readers how to fill out a call slip in a college library.

       D.To show readers where to find books in a college library.

What letter you should look for on the title card for the book “The Old Man and the Sea” by the Hemingway?

       A.The letter “t”.       B.The letter “h”.      C.The letter “s”.       D.The letter “o”.

How are books arranged and shelved in the library?

       A.By call numbers.   B.By call slips of authors’ names.

       C.In alphabetical order.    D.By the first word of book title.

Suppose you are an undergraduate and you want to borrow a book from the closed stacks, which is the correct order to do it?

a.go to the main catalog             b.show your call slip and library card

c.find out the call number   d.fill out a call slip

e.get the cards for the books

       A.a-b-e-d-c         B.a-e-c-d-b

       C.b-a-c-d-e         D.b-c-a-e-d

A chemical important of brain development may play a role in explaining why some people are genetically (由基因决定地) likely to suffer from anxiety and could lead to new treatments, U.S. researchers said.

They said highly anxious rats which were kept had very low levels of a brain chemical called fibroblast growth factor 2 or FGF2, compared with rats that were more relaxed. But when they improved the anxious rats' living conditions—giving them new toys to explore and a bigger cage to live in—levels of this brain chemical increased and they became less anxious.

“The levels of this brain chemical increased in response to the experiences that the rats were exposed to. It also decreased their anxiety.”Javier Perez of the University o f Michigan said in a telephone interview. “It made them behave the same way as the rats that were relaxed,”he said.

In a former study of people who were severely depressed before they died, the team found the gene that makes FGF2 was producing very low levels of the growth factor, which is known primarily for organizing the brain during development and repairing it after injury.

Perez thinks the brain chemical may be a marker for genetic vulnerability (脆弱性) to anxiety and depression. But it can also respond to changes in the environment in a positive way, possibly by preserving new brain cells.

While both the calm and anxious rats produced the same number of new brain cells, these cells were less likely to survive in the high-anxiety rats, the team found. Giving the rats better living conditions or injecting them with FGF2 helped improve cell survival.

“This discovery may pave the way for new, more specific treatments for anxiety that will not be based on sedation(药物镇静), but will instead fight the real cause of the disease,” Dr. Pier Vincenzo Piazza from France said in a statement.

6. We know from the passage that with the levels of FGF2 decreasing, the rats will ________.

A. die of anxiety soon          B. suffer from a headache

C. become more relaxed        D. become more anxious

7. What's the better way to increase the levels of FGF2?

A. Introducing more companions to the anxious rats.

B. Improving the living conditions of the anxious rats.

C. Injecting the anxious rats with some special medicine.

D. Giving the anxious rats more time to relax.

8. The underlined word “it” in Paragraph 4 refers to ________.

A. the team                 B. the gene

C. the growth factor          D. the brain

9. What's the main influence of the new discovery?

A. Doctors won't use any medicine to cure anxiety.

B. Doctors may treat anxiety more efficiently.

C. Doctors will find the real cause of anxiety.

D. Doctors may find new medicine for anxiety.

10. Which of the following would be the most suitable title for the passage?

A. Anxious rats and relaxed rats

B. Anxiety—a serious mental disease

C. Scientific research into the brain is important

D. Brain chemical may play key role in anxiety

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