精英家教网 > 高中英语 > 题目详情

阅读理解

  “A key chemical 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, ” the US researchers said.

  They said highly anxious rats which were kept had very low levels of a brain chemical called growth factor FGF2, compared with the rats that were more relaxed.But when they improved the anxious rats’ living conditions-giving them new toys to play with 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 of 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.

  Although 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 help find 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.

(1)

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

(2)

Which of the following is a way to increase the levels of FGF2?

[  ]

A.

Letting the anxious rats live alone.

B.

Improving the living conditions of the anxious rats.

C.

Injecting the relaxed rats with sedatives.

D.

Giving the anxious rats more enemies.

(3)

What's the main influence of the new discovery?

[  ]

A.

Doctors will cure anxiety without sedation.

B.

Doctors will find the real cause of anxiety.

C.

Doctors may find new medicine for anxiety.

D.

Doctors may treat anxiety with a new special medicine.

(4)

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 a key role in anxiety

答案:1.D;2.B;3.A;4.D;
解析:

(1)

考查细节理解。根据第二段最后一句中的“levels of this brain chemical increased and they became less anxious”可知,FGF2的减少会使老鼠变得更加焦虑。

(2)

考查推理判断,根据第二段中的“But when they improved the anxious rats’ living conditions-giving them new toys to play with and a bigger cage to live in”及倒数第二段的最后一句可推知,改善那些感到焦虑的老鼠的居住条件可以增加FGF2。

(3)

考查推理判断。根据最后一段中的“This discovery may help find 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”可推知医生不需要用药物镇静就可以治愈焦虑。

(4)

考查标题概括。通读全文可知,本文主要讲述了通过对老鼠进行试验研究人员发现大脑中的一种化学成分对焦虑起着重要的作用。故D项作为本文的标题最合适。


练习册系列答案
相关习题

科目:高中英语 来源:名师伴读高中英语二年级上 题型:050

阅读理解

  New York , May 25?   Millions of volunteers (志愿者)joined in a long chain spreading 4 125 miles across the world's richest nation Sunday and burst into songs , reaching the highest development in the Hands Across America road to raise 50 million for the nation's homeless and hungry.

  

  The chain began with a 6-year-old homeless girl named Amy in New York's Buttery Park. It spread across 16 states and Washington, D.C. where it crossed the White House   to the Queen Mary's port in California. The last people in the line were Bill and Mary Jones and their five small children, who lived in a family shelter (收容所) for the homeless in Venice, California.

  

  The chain was not unbroken some gaps were planned for safety, others opened where there were not enough people to cover the ground. But along most of the route, the healthy joined the sick, beautiful film stars , homeless beggars , wealthy artists , poor children and President and Mrs Regan all took places in the long line.

  

  

1.What is the main idea of the passage?

  

[  ]

     

A.Millions of volunteers support the poor.

     

B.The longest line is waiting for support.

     

C.The homeless and poor need help.

     

D.The richest nation faces the problem.        

2.The underlined word “raise” in the first paragraph means _______.

  

[  ]

                          
  

A.try to lift

  

B.manage to collect

  

C.bring up

  

D.join up

        

3.From the article, we know that the volunteers were made up of ________.

  

[  ]

        

A.both the homeless and the poor

  

B.the government officials, including President Regan

  

C.people in every field

  

D.people of 16 states except Amy

        

4.What do you think of the people in the chain spreading 4 125 miles?

  

[  ]

                          
  

A.They were hand in hand.

  

B.They were in good order.

  

C.They were troublesome.

  

D.They were planned for safety.

        

5.Although the United States is a developed country, ________.

  

[  ]

        

A.there is still a rebellion sometimes.

  

B.there is still many people waiting for jobs

  

C.there are still some family shelters

           

D.there are still many social problems to be solved.

查看答案和解析>>

科目:高中英语 来源: 题型:053

阅读理解

  New York , May 25?   Millions of volunteers (志愿者)joined in a long chain spreading 4 125 miles across the world's richest nation Sunday and burst into songs , reaching the highest development in the Hands Across America road to raise 50 million for the nation's homeless and hungry.

  

  The chain began with a 6-year-old homeless girl named Amy in New York's Buttery Park. It spread across 16 states and Washington, D.C. where it crossed the White House   to the Queen Mary's port in California. The last people in the line were Bill and Mary Jones and their five small children, who lived in a family shelter (收容所) for the homeless in Venice, California.

  

  The chain was not unbroken some gaps were planned for safety, others opened where there were not enough people to cover the ground. But along most of the route, the healthy joined the sick, beautiful film stars , homeless beggars , wealthy artists , poor children and President and Mrs Regan all took places in the long line.

  

  

1.What is the main idea of the passage?

  

[  ]

     

A.Millions of volunteers support the poor.

     

B.The longest line is waiting for support.

     

C.The homeless and poor need help.

     

D.The richest nation faces the problem.        

2.The underlined word “raise” in the first paragraph means _______.

  

[  ]

                          
  

A.try to lift

  

B.manage to collect

  

C.bring up

  

D.join up

        

3.From the article, we know that the volunteers were made up of ________.

  

[  ]

        

A.both the homeless and the poor

  

B.the government officials, including President Regan

  

C.people in every field

  

D.people of 16 states except Amy

        

4.What do you think of the people in the chain spreading 4 125 miles?

  

[  ]

                          
  

A.They were hand in hand.

  

B.They were in good order.

  

C.They were troublesome.

  

D.They were planned for safety.

        

5.Although the United States is a developed country, ________.

  

[  ]

        

A.there is still a rebellion sometimes.

  

B.there is still many people waiting for jobs

  

C.there are still some family shelters

           

D.there are still many social problems to be solved.

查看答案和解析>>

科目:高中英语 来源:福建省泉州五中2007-2008年高考模拟考试 英语试题 题型:050

阅读理解

ISC(HS)Reference No.S006864            New South Wales

Student Date of Birth:19/08/1988   Department of Education and Training

                     International Students Centre

Hong Xue              827-839 George Street PO Box 707

60 Waratah Street                Broadway NSW 21007

Croydon Park NSW 2133       Phone:(612)9217 4801 1300 302 456

                        Fax:(612)9212 6721

                 http://www.tafensw.edu.au/international/

WARNING LETTER

Dear Hong Xue,

  As you are aware, your student visa regulations set out a number of conditions applying to your visa.It has come to our attention that you are failing to meet the following conditions:You must maintain accommodation, support and general welfare arrangements that have been approved by your education provider if you:

  ●have not turned 18; and

  ●are not staying in Australia with:

  -a parent

  -a custodian(监护人); or

  -a relative who has been nominated(指定)by your parent or a custodian, is aged at least 21 and is of good character.

  Note:You must not change those arrangements without the written approval of your education provider.

  You must obey the following rules:

  1.During term time you must:

  a)remain in your homestay during the school term;

  b)come home every night; and

  c)inform your guardian at all times of your whereabouts.

  2.On weekends you must:

  a)have your guardian's permission to stay with friends; and

  b)inform your guardian of the name, address and phone numbers of people you are visiting.

  3.You must return your guardian's telephone calls.

  This will be your only warning.If you continue to breach(违反)your student visa regulations we will report you to the Department of Immigration and Multicultural and Indigenous Affairs.Such action may lead to the cancellation(取消)of your student visa.Please contact me on(612)9217 4801 or fax(612)9212 6721 if you have questions about your enrolment.

                   Yours sincerely

                   Tracey Carlon

                   Student Advisor

                   International Students Centre

NSW Department of Education and Training

(1)

What's the purpose of writing this letter?

[  ]

A.

To remind the recipient of the conditions for applying for a student visa.

B.

To warn the recipient not to do anything against his student visa regulations again.

C.

To tell the recipient how to contact his student advisor.

D.

To inform the recipient of the student visa regulations.

(2)

What can be learned about the recipient from this letter?

[  ]

A.

He is under 18 and studies in Australia with his parents.

B.

He is required to come home every night according to the rules.

C.

He can stay with his friends on weekends if permitted.

D.

His student Visa has been cancelled.

(3)

To which address should the recipient reply if he feels like answering the letter?

[  ]

A.

Hong Xue at 60 Waratah Street, Croydon Park NSW 2133.

B.

Tracey Carlon at the Department of Immigration and Multicultural and Indigenous Affairs.

C.

Hong Xue at NSW Department of Education and Training.

D.

Tracey Carlon at 827-839 George Street, PO Box 707, Broadway NSW 21007.

查看答案和解析>>

科目:高中英语 来源:广东省普宁市城东中学2010届高三第二次月考英语试题 题型:050

阅读理解

  So far, scientists have named about 1.8 million living species(物种), and that’s just a small part of what probably exists on Earth.With so many plants, animals, fungi, and other organisms covering the planet, it can be tough to figure out what type of spider is crawling up your leg or what kind of bird just flew by.

  A soon-to-be-launched Website might help.An international team of researchers has announced the creation of a Web-based Encyclopedia of Life(EOL).The project aims to catalogue every species on Earth in a single, easy-to-use reference guide.

  To get the encyclopedia started, the creators will use information from scientific databases that already exist.And eventually, in special sections of the site, nonscientists with specialized knowledge will join.Gardeners, for example, will be able to record the dates that their flowers first bloom each year.Bird-watchers will be able to input which birds they’ve seen and where.The technology for this kind of tool has only recently become available.

  As the EOL develops, you might find it useful for school projects.The site will have special pages for kids who are studying ecosystems in their neighborhoods.To make sure the encyclopedia is accurate, scientists will review much of the information added to it.People who visit the site will be able to choose to skip pages that haven’t been reviewed.

  Another convenient characteristic of the EOL is that you’ll be able to pick the level of detail you see to match your interests, age, and current knowledge.If you wanted to learn about polar bears for a science class report, for example, you could use the“novice”setting to get basic information about the animals.On the“expert”setting, on the other hand.you could get much more detailed information about the history, literature, and exploration of polar bears.

  It now takes years for scientists to collect all the data they need to describe and analyze species.The creators of the Encyclopedia of Life hope that their new tool will speed that process.

  Keep an eye on www.eol.org.Pages will begin to go up sometime next year, and you might find them useful for your school reports.The EOL team might have the basics for all 1.8 million entries online as early as 2017.Someday, you might add your own notes.

(1)

What is implied in the last sentence of Paragraph 1?

[  ]

A.

No one can become an expert on spiders and birds.

B.

So many spiders have crawled up your leg

C.

There are far more than 1.8 million living species.

D.

Scientists have named a lot of living species

(2)

Which of the following statements is TRUE?

[  ]

A.

You can find information of all living species online in 2017.

B.

Nonscientists will be able to add their own notes to the website.

C.

The kids preparing school reports can not have access to the informat’0 n’

D.

You are not free to choose the amount of detailed information.

(3)

What does the underlined word“novice”probably mean in Paragraph 5?

[  ]

A.

Beginner.

B.

Specialist.

C.

Scientist.

D.

Pupil.

(4)

Who are the intended readers of this passage?

[  ]

A.

Students.

B.

Researchers.

C.

Bird watchers or Gardeners.

D.

People in general

(5)

What is the best title for the passage?

[  ]

A.

Exploring Polar Bears

B.

Visit Our Website Now

C.

How to Do School Projects

D.

E-book of Life.

查看答案和解析>>

科目:高中英语 来源:浙江省嘉兴一中2010-2011学年高二10月月考英语试题 题型:054

阅读理解

  Once upon a time the colors of the world started to quarrel.Green said,“Clearly I am the most important.I am the sign of life and hope.I was chosen for grass, trees and leaves.Without me, all animals would   1  .”

  Blue interrupted,“You only think about the   2  , but consider the sky and the sea.  3   the water that is the basis of life and drawn up by the clouds from the deep sea.Without my peace, you would all be   4  .”

  Yellow chuckled(笑道),“You are all so serious.I bring laughter, fun, and   5   into the world.”

  Orange started next to blow her trumpet,“I am the color of health and strength.I may be   6  , but I am precious for I serve the needs of human life.When I fill the sky   7  , my beauty is so striking that no one gives another   8   to any of you.”

  Red could stand it   9   and he shouted out,“I am the ruler of all of you.I am the color of danger and of bravery.I am willing to   10   truth.I am also the color of passion and of love.”

  Then came Purple and Indigo(深蓝)….

  The colors went on boasting, each convinced of his or her own   11  .Their quarreling became louder and louder.Suddenly there was a startling flash of bright lightening thunder.Rain started to pour down   12  .The colors crouched(蜷缩)down   13  , drawing close to one another for comfort.

  In the midst of the clamor(叫嚷), rain began to speak,“You foolish colors, fighting   14  yourselves, each trying to dominate  15  .Don't you know that you were each made for a special purpose,   16  ?Join hands with   17   and come to me.”

  Doing as they were told, the colors   18   and joined hands.They formed a colorful rainbow.From then on, whenever a good rain   19   the world, a rainbow appears in the sky.They remember to   20   one another.

(1)

[  ]

A.

stay

B.

leave

C.

go out

D.

die

(2)

[  ]

A.

earth

B.

moon

C.

star

D.

sun

(3)

[  ]

A.

That is

B.

I am

C.

It is

D.

This is

(4)

[  ]

A.

anything

B.

nothing

C.

something

D.

everything

(5)

[  ]

A.

warmth

B.

sadness

C.

depression

D.

anxiety

(6)

[  ]

A.

usual

B.

normal

C.

common

D.

scarce

(7)

[  ]

A.

at midnight

B.

at noon or at night

C.

at sunrise or sunset

D.

during the day

(8)

[  ]

A.

gift

B.

honor

C.

thought

D.

respect

(9)

[  ]

A.

for more

B.

any more

C.

very much

D.

no longer

(10)

[  ]

A.

turn to

B.

fight for

C.

struggle with

D.

bend over

(11)

[  ]

A.

superiority

B.

disadvantages

C.

inferiority

D.

weakness

(12)

[  ]

A.

gently

B.

quietly

C.

violently

D.

peacefully

(13)

[  ]

A.

with care

B.

in fear

C.

by chance

D.

on purpose

(14)

[  ]

A.

amongst

B.

by

C.

for

D.

against

(15)

[  ]

A.

others

B.

themselves

C.

the other

D.

the rest

(16)

[  ]

A.

equal and simple

B.

ordinary and similar

C.

more or less

D.

unique and different

(17)

[  ]

A.

each other

B.

me

C.

one another

D.

them

(18)

[  ]

A.

combined

B.

separated

C.

united

D.

divided

(19)

[  ]

A.

cleans

B.

washes

C.

brightens

D.

dampens

(20)

[  ]

A.

appreciate

B.

quarrel with

C.

ignore

D.

praise

查看答案和解析>>

同步练习册答案