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Monkeys seem to have a way with numbers.
A team of researchers trained three Rhesus monkeys to associate 26 clearly different symbols made up of numbers and selective letters with 0-25 drops of water or juice as a reward. The researchers then tested how the monkeys combined—or added—the symbols to get the reward.
Here's how Harvard Medical School scientist Margaret Livingstone, who led the team, described the experiment: In their cages the monkeys were provided with touch screens. On one part of the screen, a symbol would appear, and on the other side two symbols inside a circle were shown. For example, the number 7 would flash on one side of the screen and the other end would have 9 and 8. If the monkeys touched the left side of the screen they would be rewarded with seven drops of water or juice; if they went for the circle, they would be rewarded with the sum of the numbers—17 in this example.
After running hundreds of tests, the researchers noted that the monkeys would go for the higher values more than half the time, showing that they were performing a calculation(计算), not just remembering the value of each combination.
When the team studied the results of the experiment more closely, they noticed that the monkeys tended to underestimate(低估)a sum compared with a single symbol when the two were close in value—sometimes choosing, for example, a 13 over the sum of 8 and 6. The underestimation was systematic: When adding two numbers, the monkeys always paid attention to the larger of the two, and then added only a fraction(小部分)of the smaller number to it.
"This shows that there is a certain way number is represented in their brains, "Dr. Livingstone says. “But in this experiment what they're doing is paying more attention to the big number than the little one.”
1.What did the researchers do to the monkeys before testing them?
A.They fed them. B.They named them.
C.They trained them. D.They washed them.
2.How did the monkeys get their reward in the experiment?
A.By drawing a circle. B.By touching a screen.
C.By watching videos. D.By mixing two drinks.
3.What did Livingstone's team find about the monkeys?
A.They could perform basic addition. B.They could understand simple words.
C.They could remember numbers easily. D.They could hold their attention for long.
4.In which part of a newspaper may this text appear?
A.Science. B.Health. C.Education. D.Entertainment.
九年级英语阅读单选困难题查看答案及解析
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Monkeys seem to be naughty and lovely when they are given bananas. Which of the following is correct for the underlined word in the sentence?
九年级英语单项填空中等难度题查看答案及解析
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—lt seems that you are very busy with your subjects all the time, Sally.
—I have to. I have a lot of ______ from the society.
A. time B. culture C. pressure D. interest
九年级英语单项填空中等难度题查看答案及解析
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With a lot of students about too much homework, our teachers have tried some ways to solve this problem.
A.complain B.complaining C.complained D.to complain
九年级英语单选题中等难度题查看答案及解析
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--Would you like to go with us?
-- , but I have lots of homework to do.
A. No way B. No problem C. I'd love to D. I don't think so
九年级英语单选题简单题查看答案及解析
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When you have a different opinion with your friend, what should you do? One of the ways is to talk to your friend and tell him or her how you’re feeling. It’s always important to share your feelings with your friend.
Of course, sometimes friends do drift apart. As we grow older, our interests change and sometimes this means that a friendship may not be as close as it once was. This also means that you , too, may find a different group of friends to spend time with.
Then what should you do to keep friends? One helpful thing is to be sure you let others know you like them. Smile, talk to them, listen with interest and praise them for the things you like about them. People naturally like to make friends with the people who understand and enjoy them.
It’s also important to remember that you should always be yourself. Sometimes when you focus on “keeping friends”, you might begin to do things or act in some ways that aren’t normally part of your personality. Moreover, if your friend is unfriendly to you, that doesn’t mean you should become hurtful to other people. If keeping a friendship means you have to become someone who you aren’t, that friendship isn’t worth keeping.
1.When you have a different opinion with your friends, you should _____.
A. keep quiet and have a good rest
B. tell how you’re feeling to them
C. keep away from them for days
2.When the writer says “friends do drift apart” in the second paragraph, he wants to express _____.
A. people remain friends for a lifetime
B. the friendship is closer and closer
C. the friendship is not as close as before
3.Which of the following is good for keeping friends?
A. Praise and enjoy your friends.
B. Never understand the weakness of friends.
C. Say something that does harm to your friends.
4.The last paragraph tells us that ______.
A. it’s important to always agree with our friends
B. people shouldn’t lose themselves to keep friends
C. we are encouraged to be hurtful to unfriendly people
5.The passage is mainly about _____.
A. feelings B. education C. Friendship
九年级英语阅读理解中等难度题查看答案及解析
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I need to _________ with some ways of getting money, or I’ll have to stop.
A. pick up B. come up
C. take up D. set up
九年级英语单项填空中等难度题查看答案及解析
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I need to _________ with some ways of getting money or I’ll have to stop.
A. pick up B. come up C. take up D. set up
九年级英语单项填空中等难度题查看答案及解析
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Linda thinks working with a group is one of ________ best ways to review what we have learned.
A. a B. an C. the D. /
九年级英语单选题中等难度题查看答案及解析
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Why do some people seem to be naturally happier than others?
Researchers from the University of Edinburgh have known the answer according to their recent study. Nine hundred twins took part in the study and had their happiness levels measured. The result shows that our genes(基因), in fact, control half of the personality traits(特点) that make us happy. And the other half is linked with lifestyles, careers and relationships. That is to say, individual differences in happiness are based on genetic differences between people.
"All human beings naturally desire happiness. We have found that happiness is partly rooted in genes," said Dr Alexander Weiss, the leader of the research. "This study is both a milestone and a new beginning: A milestone because we are now sure that there is a genetic side of happiness and a new beginning because the happy genes have just been found."
However, the researchers warn that genes are not the whole story. The environment can also affect oar happiness levels. In fact, a great deal of our happiness is directly connected with whatever is happening in our lives. Thus finding the right matters affecting us is the correct thing.
To become truly happy, we need to understand our important needs perfectly for if we fail to satisfy our needs, then unhappiness might happen. Besides, doing simple things, such as keeping a journal and writing down three things that we are thankful for every day, can increase our long-term happiness. Will you try it tonight?
1.What plays the most important role in making us happy?
________________________________________________________
2.What tip will you give to the people who are easily unhappy?
_________________________________________________________
3.Some people think wealth seems to bring all happiness in life. Do you agree with this point of view? Why or why not?
________________________________________________________
九年级英语回答问题中等难度题查看答案及解析
