According to a team of researchers, an animals' ability to perceivetime is linked to their pace of life. Our results lend support to the importance of time perception in animals where the ability tope 题目和参考答案——青夏教育精英家教网—

According to a team of researchers, an animals' ability to perceive(感知)time is linked to their pace of life.

"Our results lend support to the importance of time perception in animals where the ability to

perceive time in a very short time may be the difference between life and death for fast moving

creatures." commented lead author Kevin Healy from Trinity College Dublin.

The study was done with a variety of animals using a phenomenon based on the maximum speed of flashes of light an individual can see before the light source is seen as constant. Dogs, for example, have eyes with a refresh rate higher than humans.

One example of this phenomenon at work, the authors say, is the housefly and its ability to avoid being hit. The research showed flies "observe motion in a shorter time than our own eyes can achieve," which allows them to avoid being hit.

Professor Graeme Ruxton of the University of St Andrews in Scotland, who worked jointly(共同地) on the research project, said in a statement, "Having eyes that send updates to the brain at much higher frequencies than our eyes do is of no value if the brain cannot process that information equally quickly. Thus, this work highlights the impressive abilities of even the smallest animal brains. Flies might not be deep thinkers, but they can make good decisions very quickly."

In comparison the tiger beetle(虎甲虫)runs faster than its eyes can keep up, basically becoming blind, which requires it to stop periodically to re-evaluate its prey's(猎物)position.

Our results suggest that time perception offers an as yet unstudied dimension along which

animals can specialize and there is considerable range to study this system in more detail.

1.What is the research mentioned in the passage mainly about?

A. Pace of life of animals. B. Time perception of animals.

C. Lifetime of small animals. D. Impressive abilities of animals.

2.Why can houseflies avoid being hit?

A. They can think very deeply before they act.

B. They can fly much faster than their eyes can keep up.

C. They can process the information as quickly as they receive it.

D. They can send information to brain more quickly than to their eyes.

3.What will a tiger beetle have to do to catch a moving prey?

A. Try to run as fast as it can. B. Prevent itself from becoming blind.

C. Slow down to gain its time perception. D. Stop occasionally to spot the prey again.

练习册系列答案

年级	高中课程	年级	初中课程
高一	高一免费课程推荐！	初一	初一免费课程推荐！
高二	高二免费课程推荐！	初二	初二免费课程推荐！
高三	高三免费课程推荐！	初三	初三免费课程推荐！
更多初中、高中辅导课程推荐,点击进入>>

相关习题

科目：高中英语 来源：甘肃省2016-2017学年高一下学期期中考试英语试卷 题型：阅读理解

Camels are large animals living in dry areas. There are two species of camels; the Arabian camel with a single hump(驼背) from the dry desert areas of West Asia, and the Bactrian camel with two humps from Central and East Asia. Camels are over 7 feet tall and weigh over 1,600 pounds. They will live up to 40 to 50 years. Most camels are domesticated(驯化) and fed by people. Camels are plant-eaters．

Camels are very strong animals with wide, padded feet. They have thick leathery pads on their knees and chest. Camels have nostrils(鼻孔) that can open and close, protecting them from the desert environment. Bushy eyebrows and two rows of long eyelashes protect their eyes from sand. Their mouth is extremely tough, allowing camels to eat thorny(带刺的) desert plants. Their widened feet help them move without sinking into the sand. Their thick coats reflect sunlight, and also protect them from the intense heat from desert sand. Their long legs help by keeping them further from the hot ground.

Camels can go without food and water for 3 to 4 days. They do not store water in their humps as is commonly believed．The humps are actually a container of fat. Camels are incredibly well-adapted to their environment. When conditions heat up, camels can increase their own body temperature, which prevents sweating and therefore water loss. They may not sweat at all during the day.

Camels are sometimes called “ships of the desert” because people ride them around the hot, dry deserts of the world. However, the number of camels is becoming smaller for various reasons.

1.According to the passage, camels usually live in ________.

A. Asia B. Africa

C. America D. Australia

2.Paragraph 2 is mainly about ________.

A. camels are useful animals

B. camels are clever animals

C. camels’ body structure and function

D. camels’ characteristics and habits

3.The reason why camels lose little water in deserts is that they ________.

A. get water from green foods

B. can adjust their temperature

C. store enough water in the humps

D. can manage without water

4.What will the author probably talk about following the last paragraph?

A. Ways to protect camels.

B. Habitats of camels.

C. Reasons for raising camels.

D. Functions of camels.

查看答案和解析>>

科目：高中英语 来源：山东省济宁市2016-2017学年高一下学期第三学段考试英语试卷 题型：短文填空

One day, a young man asked Albert Einstein, a great 1. (science), what the secret of success was. The scientist told him that the secret of success is hard work. A few days 2. (late), the young man asked him 3. same question again. Einstein was not very 4. (unhappy). He didn’t say anything, 5. wrote a few words 6. a piece of paper and handed 7. to the young man. The young man looked at the paper. On it was 8. (write): A = X + Y + Z. “What does this mean?” asked the young man. “ A means success,” said the scientist. “ and X means hard work, Y means good 9. (method), and Z means 10. (little) talking and more work.”

查看答案和解析>>

科目：高中英语 来源：全国普通高等学校2017年招生统一考试.模拟调研卷（三）英语试卷 题型：短文填空

Holi is a spring festival also 1. (know)as the festival of colors or the festival of love.It is 2. ancient Hindu religious festival which has become popular with non-Hindus in many parts of South Asia.The Holi Festival 3. (take)place on the day after the full moon in March each year.At the Hindu-Festival people 4.(happy)celebrate the victory of the good over the bad and the beginning of the spring.

Holi celebrations start on the night before Holi where people gather,sing and dance.next morning is a free-for all carnival(狂欢）of colors, 5. participants play,chase and color each other with dry powder and colored water for 6. (they)water fight.Anyone and everyone is fair,frieng or stranger,rich or poor,man or woman,children and elders.The joy and fight with colors occurs in the open streets,open park and 7. (building),Groups carry drums and musical instruments,singing 8.dancing.In the evening,people dress up to visit friends and family.

Holi festival has other cultural 9.(significant)significance.It is the festive day to end and rid oneself of past errors,end conflicts by 10.(meet) others and repair broken relationships.

查看答案和解析>>

科目：高中英语 来源：辽宁省锦州市2017届高三第二次模拟考试英语试卷 题型：书面表达

假定你是李华,你的美国朋友David作为交换生曾在你家居住。近期你校要举办以“Foreigners Tell Chinese Stories”为主题的英语征文活动。请写一封邮件邀请他参加。要点如下:

1.截稿时间:2017年2月1日;

2.词数要求:500左右;

3.投稿邮箱:chinesestory2017@126.com。

注意:1.词数:100左右;

2.开头结尾已给出,不计入总词数。

Dear David,

____________________________________________________________________________________________

___________________________________________________________________

Yours,

Li Hua

查看答案和解析>>

科目：高中英语 来源：黑龙江省2016-2017学年高二4月月考英语试卷 题型：单词拼写

1.The boys d__________ wanted to leave the house on fire.

2.This is not t__________ of Chinese, but is a feature of the Thai language.

3.__________ (守时) is a necessary habit in all public affairs of a civilized society.

4.Teacher: Does the book enjoy __________ (受欢迎) among you students?

Student: Yes, many say that they can’t tear themselves from it.

5.When he told them what had happened, they were in total a__________ . “I don’t believe it!” one man said.

6.The magician produced __________ (束) of flowers out of his glove hands.

7.The man who was announced guilty at court claimed that he had evidence to prove his i________ .

8.He got a __________ (奖学金) to the Pratt Institute of Art.

9.Irish households are among the largest in Europe, with an a__________ of three people in each unit.

10.When he first arrived in the US, Yao was an __________ hit (爆红) among basketball fans nationwide.

查看答案和解析>>

科目：高中英语 来源：黑龙江省2016-2017学年高二4月月考英语试卷 题型：单项填空

__________ a part-time job at the weekend does not necessarily mean not working on weekdays.

A. To take B. To be taking

C. Taking D. Having taken

查看答案和解析>>

科目：高中英语 来源：2017年普通高等学校招生全国统一考试模拟（七）英语试卷 题型：短文改错

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下短文。短文中共有10处错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

When taking a test,you may feel shaky,sweaty,with your heart beat quickly.It means you get test anxiety.Actually,test anxiety is the type of performance anxiety.You feel worrying about how you can perform well and focus with some bad things that may happen.Test anxiety create more pressure on you,that may prevent you from doing your best.But test anxiety can overcome.The following method can help deal with test anxiety and let you to gain a perfect score.First,make full preparations for the test and think positive.Then,learn some breathing exercises to help calm yourself down.

查看答案和解析>>

科目：高中英语 来源：内蒙古2016-2017学年高二下学期第一次月考英语试卷 题型：书面表达

某中学生英文报正举办“The Season I Like Best”的征文活动。请用英文写一篇短文投稿，内容包括：

1. 你最喜欢的季节；

2. 你喜欢该季节的两条理由（如：气候、景色、活动、感受……）。

注意：1. 词数100左右；

2. 题目已为你写好；

3. 行文连贯，语篇完整；

4. 文中不得透露个人真实信息。

____________________________________________________________________________________________

___________________________________________________________________

查看答案和解析>>

同步练习册答案

练习册

高中

初中

小学