E
Research on the human brain has been attracting more and more scientists in recent years, just like the booming 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 transplant a chip into a human brain. This idea may make everyone’s dream come true. If we compare a human brain to a hard disc（硬盘）, what the scientists are doing is to enlarge the capacity of the hard disc. For the time being, there are some difficulties in such transplant experiments, but scientists never give up.
Experiments have 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 available, deep and detailed images were made of the memory area in Ted’s brain containing information about swimming by the scientists. They obtained a series of useful information, the signals transferred by the nervous system. Such information was saved into a button-sized chip, which was then transplanted into the action memory area in Tallin’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 Nerve 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 making a transfer 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 and sensible. It could follow every gesture and any command given by its master. But “Genius” gave no response to its master, and in fact did not recognize him at all.
57. The purpose of the experiment is _____.
A. to combine the computer and the human brain    
B. to enlarge the capacity of human brain
C. to make some stupid dog turn clever          D. to make bear swim
58. Which of the following statements is TRUE?
A. The scientists transferred a button-sized chip with useful information in Tallin’s brain.
B. The first 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
59. What does the underlined word “success” refer to?
A. The two dogs woke up.
B. They were both good at memorizing.
C. The Idiot grasped all the abilities of Genius.
D. The Genius grasped all the abilities of Idiot.
60. 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 related useful information
C. a dog can become clever after entire transplant of the memory area
D. it is really good for animals to have been involved in the transplant experiment

    根据短文内容，从短文后的选项中选出能填入空白的最佳选项。选项中有两项为多余选

项。

Brain Transplants

Research on the human brain has been attracting more and more scientists in recent years.   71   If we compare a human brain to a hard disc, what the scientists are doing is to make better use of the hard disc.

The idea that a human brain could be transplanted (移植) may come from Frankenstein. In 1999, an experiment turned a bear into a dolphin (海豚).   72   They were made of the memory area in the dolphin’s brain containing information about swimming. They had a series of useful information, which was saved into a button – sized chip (芯片). Later the information was transplanted into the action memory area in the bear’s brain.   73   It proved to be a highly successful experiment and a bear was turned into a dolphin.

Recently, another memory transplant was performed at the Motor Nerve Rescarch Instance of the University of California. The experiment bad an entire transplant of the memory area.   74   The transplant was performed from a dog named Cenius to a dog named idiot. Cenius could follow up to 100 gestures and orders made by its master. It was a real genius in memorizing. However, Idiot had no contact with people since its birth. It because an animal with nothing in its brain, without any memory.

  75   When the two dogs woke up, Idiot had grasped all the abilities Cenius possessed; it was good at memorizing and sensible. It could follow every gesture and any command given by its master. But Cenius gave no response to its master, and did not recognize him at all.

       A．The experiment was a complete success.

       B．It included actions, moods, logic, words, images, etc.

       C．Then it was released (释放) by means of electric power.

       D．Different images have different meanings in the memory area.

       E．Using the most advanced technology, detailed images were produced.

       F．Discoveries show that messages are carried by the central nervous system in the brain.

       G．One of the latest topics is how to change the human brain or combine it with the computer.

One of the most difficult questions to answer is how much a job is worth. We naturally expect that a doctor’s salary will be higher than a bus conductor’s wages. But the question becomes much more difficult to answer when we compare a miner with an engineer, or an unskilled man working on an oil-rig（钻探平台）with a teacher in a secondary school. What the doctor, the engineer and the teacher have in common is that they have devoted several years to studying in order to obtain the necessary qualifications for their professions. We feel instinctively that these skills and these years should be rewarded. At the same time we recognize that the work of the miner and the oil-rig laborer is both hard and dangerous, and that they must be highly paid for the risks they take.

　　Another aspect we must take into consideration is how socially useful a man’s work is. Most people would agree that looking after the sick or teaching children is more important than, say, selling second-hand cars. Yet it is almost certain that the used-car salesman earns more than the nurse and the schoolteacher.

　　Indeed, this whole question of just rewards can be turned on its head. You can argue that a man who does a job which brings him personal satisfaction is already receiving part of his reward in the form of a so-called “psychic（精神的）wage”, and that it is the man with the boring, repetitive job who needs more money to make up for the soul-destroying repetitiveness of his work. It is significant that the jobs like nursing and teaching continue to be poorly paid, while others, such as those in the world of sport or entertainment, carry financial rewards out of all proportion to their social worth.

Although the amount of money that people earn is largely determined by market forces, this should not prevent us from seeking some way to decide what is the right pay for the job. A starting point would be to try to decide the ratio（比率）which ought to exist between the highest and the lowest paid. The picture is made more complicated by two factors: firstly by the welfare benefits which every citizen receives, and secondly by the taxation system which is often used as an instrument of social justice by taxing high incomes at a very high rate indeed. Most countries now regard a ratio of 7:1 as socially acceptable. If it is less, the highly-qualified people carrying heavy responsibilities will become disappointed, and might even end up by leaving for another country. If it is more, the difference between rich and poor will be so great that it will lead to social unrest.

1.Why do people naturally expect that doctors should be well-paid?

A．Their work requires greater intelligence.

B．They are under constant pressure at work.

C．They work harder than most other people.

D．They have studied for years to get qualified.

2.In Paragraph 2 and 3, the author indicates that __________.

A．the talented should do more important work

B．unskilled jobs have less social responsibility

C．those with more socially useful jobs earn less

D．people want to pay more to important services

3.Which of the following statements would the author agree?

A．It’s difficult to define the social value of a job.

B．The market will decide what the right pay is for a job.

C．People should find a proper ratio between high and low pay.

D．Those receiving high salary should carry heavy responsibilities.

The Mystery of the Flashing Fireflies

During summer nights fireflies flash in the darkness. They look like bright spots of light dancing on the breeze. Catching them in a jar for a few minutes can be fun. Fireflies are not really flies, though. They are winged beetles. Scientists are using these special beetles to learn more about our world.

The reason a firefly flashed its light is to find a mate. There are around two thousand species, or kinds, of fireflies. Fireflies mate only with their own species. Each kind of firefly has its own flash pattern. It is important that fireflies recognize this pattern. That way they can find bugs of their own kind. The male firefly flies around in the sky while the female firefly stays close to the ground.

For many years, how a firefly flashes its light was a mystery. Scientists now know that a firefly’s light is a cold light. It gives off all of its power as light. It does not produce heat. A normal light bulb gives off only ten percent of its power as light. The rest of the power is wasted as heat. That is why a light bulb that has been on for a while is very hot. The firefly’s light does not feel hot like a light bulb.

Scientists have also learned that fireflies have a small built-in lantern. This special lantern is located inside a firefly’s body. To create light, a gas flows through tiny tubes. This causes the firefly to light up. A firefly can also turn its light on and off quickly. This puzzled scientists. They learned that short bursts of this gas make the firefly glow. When the gas fades, the light goes out. This process happens very quickly.

Scientists know that what they learn from fireflies will be important. Medical studies using fireflies are helping scientists fight illnesses in human beings. They have made new medicines from the chemicals used by fireflies to make light. Fireflies have also helped with new discoveries. New flashlights and flares have been made based on fireflies. These new flashlights and flares produce a cold light like a firefly. This way all the power makes the light shine. This little bug may be a pleasure to watch, but it is also an important part of our lives.

Why did the author most likely include Paragraph 4?

A. To explain how fireflies make light.        B. To describe different kinds of fireflies.

C. To show how much power fireflies use.     D. To describe why fireflies make light.

Which of these is the best choice for a heading for Paragraph 5?

A. The Cool Light of Fireflies               B. Watching Fireflies Flash

C. Understanding the Patterns               D. Learning from Fireflies

According to the passage, a firefly’s light is different from a light bulb’s light because the firefly’s light _______.

A. shines brighter  B. does not fade   C. lasts longer  D. is not hot

A reader asks this question about the passage: “ How many different kinds of fireflies are there?” Which paragraph from the passage answers the question?

A. Paragraph 2   B. Paragraph 3     C. Paragraph 4   D. Paragraph 5

The author most likely wrote this passage in order to __.

A. tell why fireflies light up                B. give facts about fireflies

C. show how fireflies help doctors           D. compare a firefly to a light bulb

The Mystery of the Flashing Fireflies

During summer nights fireflies flash in the darkness. They look like bright spots of light dancing on the breeze. Catching them in a jar for a few minutes can be fun. Fireflies are not really flies, though. They are winged beetles. Scientists are using these special beetles to learn more about our world.

The reason a firefly flashed its light is to find a mate. There are around two thousand species, or kinds, of fireflies. Fireflies mate only with their own species. Each kind of firefly has its own flash pattern. It is important that fireflies recognize this pattern. That way they can find bugs of their own kind. The male firefly flies around in the sky while the female firefly stays close to the ground.

For many years, how a firefly flashes its light was a mystery. Scientists now know that a firefly’s light is a cold light. It gives off all of its power as light. It does not produce heat. A normal light bulb gives off only ten percent of its power as light. The rest of the power is wasted as heat. That is why a light bulb that has been on for a while is very hot. The firefly’s light does not feel hot like a light bulb.

Scientists have also learned that fireflies have a small built-in lantern. This special lantern is located inside a firefly’s body. To create light, a gas flows through tiny tubes. This causes the firefly to light up. A firefly can also turn its light on and off quickly. This puzzled scientists. They learned that short bursts of this gas make the firefly glow. When the gas fades, the light goes out. This process happens very quickly.

Scientists know that what they learn from fireflies will be important. Medical studies using fireflies are helping scientists fight illnesses in human beings. They have made new medicines from the chemicals used by fireflies to make light. Fireflies have also helped with new discoveries. New flashlights and flares have been made based on fireflies. These new flashlights and flares produce a cold light like a firefly. This way all the power makes the light shine. This little bug may be a pleasure to watch, but it is also an important part of our lives.

1.Why did the author most likely include Paragraph 4?

2.Which of these is the best choice for a heading for Paragraph 5?

3.According to the passage, a firefly’s light is different from a light bulb’s light because the firefly’s light _______.

4.A reader asks this question about the passage: “ How many different kinds of fireflies are there?” Which paragraph from the passage answers the question?

5.The author most likely wrote this passage in order to __.