阅读下面短文，从各题A、B、C、D四个选项中，选出最佳选项。Your brain isn’t a muscle, but you can treat it li
题型：不详难度：来源：
Your brain isn’t a muscle, but you can treat it like one
Many people focus on physical fitness, but few know that brain fitness is also something you can work on. In fact, you can exercise your brain as often as you do to your arms or legs —and the results can be positive and empowering.
To improve your brain, you can’t simply repeat the same exercises over and over. Just as lifting a two—pound weight will stop challenging you, so will repetitive exercises such as crosswords or Sudoku. Once you master easy exercises, you must move on to harder ones in order to push your brain —like your muscles —to a new level.
The science behind brain training
Scientists once believed that your mental abilities were fixed in adulthood. Since studies have shown just the opposite, millions of people around the world have adopted the new practice of brain training. The most popular of these brain training products is made by the San Francisco—based Lumosity. Lumosity"s scientists with an experienced team of game designers have developed a fun，effective online brain training program that measures，tracks，and adapts to your progress，so you"ll always be challenged.
Promising studies on the effects of brain training
In a 2013 Stanford study，a treatment group of 21 breast cancer survivors used 12 weeks of Lumosity training to work on processing speed，mental flexibility，and working memory tasks. On average，those who trained improved on tests of these abilities，compared to a group that did not train with Lumosity.
There is even some evidence suggesting that Lumosity may be beneficial to normal，healthy adults. In a 2011 study by Lumosity and San Francisco State University researchers. 13 people who trained over 5 weeks improved working memory scores by 10％and attention scores by 20％.
Brain training is designed to meet real-life needs
The design of brain training is targeted at real-life benefits instead of improving game scores. Better attention，for example，can mean greater focus in the classroom or at an important business meeting. With improved processing speed，you might react and adapt faster to the demands of a busy life. And a better memory could mean stronger，longer relationships with the people closest to you.
小题1:We can learn from the passage that _________.
| A．brain training speeds up the recovery of breast cancer |
| B．your brain is like a muscle because it gives you power |
| C．people"s mental abilities can"t develop after they grow up |
| D．Lumosity can measure，track and suit your level as you improve |
| A．Better attention. | B．A better memory. |
| C．Better writing skills. | D．Higher processing speed. |
| A．People should care more about physical health instead of mental health. |
| B．Brain training has been proved effective through scientific researches. |
| C．A bad memory is the only reason for weak relationships with people. |
| D．Playing online games is the best way of brain training. |
| A．Brain Training Makes a Difference | B．Train Your Brain like a Muscle |
| C．Lumosity，Your Best Choice | D．How to Train Your Brain |
答案
小题1:D
小题2:C
小题3:B
小题4:A
解析
试题分析：和锻炼身体一样，我们也可以锻炼我们的大脑，这篇文章讲的是我们可以训练大脑，以及如何训练大脑。
小题1:细节题：从第三段的句子：Lumosity"s scientists with an experienced team of game designers have developed a fun，effective online brain training program that measures，tracks，and adapts to your progress，so you"ll always be challenged.可知随着你的进步 Lumosity可以测量，记录和适应你的水平。选D。
小题2:细节题：从文章最后一段的内容：可知大脑的训练可以提高注意力，记忆力，处理的速度，没有说可以提高写作技能，选C
小题3:推理题：从第五段的句子：There is even some evidence suggesting that Lumosity may be beneficial to normal，healthy adults.可知通过科学研究大脑训练已经被证明是有效的，选B
小题4:标题确定题：从第一段的句子：Many people focus on physical fitness, but few know that brain fitness is also something you can work on. In fact, you can exercise your brain as often as you do to your arms or legs —and the results can be positive and empowering. 可知这篇文章讲的是我们可以训练大脑，以及如何训练大脑。所以选A。
举一反三
I trained hard every day. Since I wanted to be the best I could be, I knew I would have to set some clear goals for myself. A couple of my goals were: run a 135-mile ultra-marathon(超级马拉松) across Death Valley, win the Badwater Ultra-Marathon, and run a marathon to the South Pole.
I had no idea how I was going to achieve these goals, but they certainly encouraged me to work hard. Today, I am really grateful to say that I have achieved all of them. Shortly after completing these goals, I set another goal: to run fifty marathons, in fifty states, in fifty days. Nobody had done anything like this before. To be honest, I was not quite sure if I could. But there was only one way to find out…so I just started training and preparing to give it my best try.
I completed that goal one year ago, and it felt great! But for me, life is not all about achieving goals. Sure, it feels good to succeed, but the greatest reward for me was learning more about myself and what I was able to do.
Only by stepping out into the unknown and stretching(使倾注全力) ourselves can we really discover what our true potential(潜能) is。
小题1:Which played an important role in the author’s success?
| A．Setting goals | B．Learning from others. |
| C．Being honest | D．Keeping on reading . |
| A．very grateful | B．not quite confident |
| C．quite afraid | D．not very satisfied |
| A．Win the Badwater Ultra-Marathon. |
| B．Run a marathon to the South Pole. |
| C．Run fifty marathons, in fifty states, in fifty days. |
| D．Run a 135-mile ultra-marathon across Death Valley. |
| A．life means achieving goals |
| B．success is the greatest reward |
| C．sports help develop our potential |
| D．everyone may have great potential. |
Our nature includes not just humans but plants and animals as well. Everything in our environment is connected in a complex cycle. If you have a better understanding of how animals would behave and work with us, then you would value nature better.
Some animals are actually misunderstood by people like sharks and snakes. These creatures are thought of as human killers, and this is mainly because we don’t understand why they behave that way. In zoology you would be able to learn natural behavior as well as their homes so you would completely understand why they would behave in a defensive(防御的) manner when they seem to be threatened. Studying zoology would help people achieve clearness over the common myths we have on different wild animals.
Studying zoology would help people know the real facts about animals. One of the negative facts is the decreasing numbers of some species of animals. It makes people realize that there is a need for nature to be always balanced. We need animals to keep the balance in our environment and for humans to survive as well. It would help us learn the needs that animals lack and we can respond by thinking of solutions we can give to the endangered species of animals.
Modern progress is needed for a country to grow in terms of its economy; however, it should not force us to destroy our rainforests and oceans. People should realize that our modern lives should include the lives of the animals that live with us. They should not be contained in zoos but in their natural homes as well. We will learn that every living creature on the earth has the right to own a home and we need to fight for them to have permanent(永久的) homes.
小题1:According to the text, nature should be .
| A．left alone | B．treated seriously |
| C．taken for granted | D．taken lightly |
| A．making our world beautiful | B．protecting species of plants |
| C．providing food for humans | D．keeping nature in balance |
| A．caretakers | B．killers | C．competitors | D．trainers |
| A．The Ways of Protecting Animals |
| B．The Importance of Studying Zoology |
| C．The Introduction to Zoology |
| D．The Advantages of Learning Zoology |
There are different forms of color blindness. In some cases a man may not be able to see deep red. He may think that red, orange and yellow are all shades of green. Sometimes a person can’t tell the differences between blue and green. In rare cases an unlucky man sees everything in shades of green--- a strange world in deed.
Color blindness in human beings is a strange thing to explain. In a single eye there are millions very small things called “cones”. These help us see in a bright day and tell the differences between colors. There are also millions of “rods”, but these are used for seeing when it is nearly dark. They show us shapes(形状) but not color. Some insects have favorite colors. Mosquitoes like blue but do not like yellow. A red light will not attract insects but a blue lamp will. In similar way human being also have favorite colors. Yet we are lucky. With the aid of cones in our eyes we can see many beautiful colors by day and with the aid of the rods we can see shapes at night. One day we may even learn more about the invisible colors around us.
小题1:The passage is mainly about ______.
| A．color and its surprising effects on drivers |
| B．women being luckier than man in that fewer of them are color blind |
| C．danger caused by color blindness |
| D．color blindness and how our eyes tell different colors and shapes |
| A．tell different colors | B．see in weak light |
| C．tell different shapes | D．tell orange from yellow |
| A．Women are more careful. |
| B．There are fewer color blind women. |
| C．Women are fonder of driving than men. |
| D．Women are weaker but quicker in thinking. |
| A．Not all of them have the same problem in recognizing colors. |
| B．None of them can see deep red but all can tell blue from green. |
| C．None of them can tell blue from green but all can see deep red. |
| D．All of them are lucky enough to see everything in shades of green. |
Now, scientists in California say they have come up with a way to turn a living cell into a memory device.
It can store only one tiny bit of information, but it’s a start. In the future, a cell-based gadget might travel through the body and record measurements. The benefit to human health could be big: the right tool, for example, might record the earliest signs of disease.
Doctors, scientists and other curious people want to know what is happening inside the body, even at levels that can’t be seen by the naked eye. So far, there is no device small enough to travel through the bloodstream.
If normal machines won’t do the trick, perhaps biology will. Scientists who work in the field of synthetic (合成的) biology are trying to find ways to turn living things into human tools. In the case of the new memory device, bioengineers from Stanford University used the genetic material inside living cells to record information.
This genetic material consists of DNA. Found in nearly every cell, DNA carries all of the information that keeps a living thing alive.
In the new experiment, the researchers turned DNA from bacteria(细菌) into a switch. They “flip (翻转)” a small section of DNA. Then, using the same procedure (过程) , the scientists flip the section again—returning it into its normal structure.
Using these DNA switches, “We can write and erase DNA in a living cell,” bioengineer, Jerome Bonnet, explained to Science News.
It might take years before his team or others identity whether a DNA-based memory device might be practical. Right now, it takes one hour to complete a flip. That is far too long to be useful. Plus, a flipped section has a very small little memory—less than what a computer uses to remember a single letter.
“This was an important proof that it was doable,” Bonnet told Science News. “Now we want to build a more complex system, something that other people can use.”
小题1:What is the aim of listing the electronic things in the first paragraph?
| A．To make the passage more fashionable. |
| B．To show how electronic things have memory. |
| C．To discuss things in detail. |
| D．To make the subject of the text more understandable. |
| A．To detect disease at the earliest point. |
| B．To help improve the memory. |
| C．To help people build a body. |
| D．To replace many electronic gadgets. |
A. The cells of bacteria.
B. The DNA of bacteria.
C. A section of bacteria.
C. The nucleus of bacteria.
小题4:What do we know about a flipped section of DNA?
| A．It has a very small memory. |
| B．It can function as a computer. |
| C．It has one letter in it. |
| D．It takes a day to complete it. |
“There is a between the studies chosen by young Danes and their background. Even for the young people who have very good grades in their A-level exams, and who could successfully admission to a large variety of studies, the parents’ of education and social class play an important role in their choice,” says Education Sociologist Jens Peter Thomsen, who is one of the researchers behind the study.
The study “The Educational Strategies of Danish University Students from Professional and Working-Class Backgrounds” is 60 interviews with Danish students from six different university level study programmes: Medicine, architecture, sociology, economy, pharmacy and business studies.
The young people bring with them the they get from their families. If you grow up in a home with parents who are doctors or architects with a strong professional , it is an obvious choice to follow the path as your parents when you grow up.
“For young people whose parents are university educated, such as fame and mastery of expert knowledge are important. They are by an educational culture in which you are a diligent student, and where leisure activities are to the identity that lies within your studies. These young people have also grown up with discussions around the dinner table which also prepare them for their lives as students,” says Jens Peter Thomsen.
He also added, “Young people who come from a working class background, and have good grades have to the full range of opportunities they have. But the effort to reach this goal must start early”.
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