摘要:D added 相当于once they are added-.

网址:http://m.1010jiajiao.com/timu3_id_2945566[举报]

  The television camera is rather like the human eye.Both the eye and the camera have a lens(镜头),and both produce a picture on a screen.In each case the picture is made up of millions of spots of light.

  Let us see how the eye works.When we look at an object a person, a house, or whatever it may be we do not see all the details of the object in one piece.We imagine what we do, but this is not the case.In fact, the eye builds up the picture for us in our brain, which controls our sight, in millions of separate parts, and, although we do not realize it, all these details are seen separately.

  This is what happens when we look at something.Beams of light of different degrees of intensity(强度), reflected from all parts of the object, strike the lens of the eye.The lens then gathers together the spots of light from these beams and focuses them on to a light sensitive plate the retina(视网膜)at the back of the eyeball.In this way an image of the object is produced on the retina in the form of a pattern of lights.

  The retina contains millions of minute light sensitive elements, each of which is separately connected to the brain by a tiny fibre in the optic(视力的)nerve.These nerve fibres, working independently, pick out minute details from the image on the retina and turn the small spots of light into nerve impulses(冲击)of different strengths.They then transmit these impulses to the brain.They do this all at the same time.

  All the details of the image are fed to the brain, and, as we have taught our brain to add them together correctly, we see a clear picture of the object as a whole.

  Television, which means vision at a distance, operates on a similar principle.A television picture is built up in thousands of separate parts.

  Beams of light reflected from the subject being televised strike the lens of the television camera, which corresponds to(相当于)the lens of the eye.The camera lens gathers together the spot of light from these beams and focuses an image of the subject on to a plate, the surface of which is coated with millions of photo electric elements sensitive to light.

(1)

In the first paragraph, we are told that the television camera is like the human eye in ________

[  ]

A.

one way

B.

two ways

C.

three ways

D.

a large number of ways

(2)

Which of the following is NOT true according to the writer?

[  ]

A.

The eye produces a picture on a screen.

B.

Our sight is controlled by our brain.

C.

We see all the details of an object in one piece.

D.

The picture is made up of millions of spots of light.

(3)

All the rays of light reflected from objects are ________

[  ]

A.

of the same intensity

B.

not at all intense

C.

to some degree intense

D.

of varying intensities

(4)

A camera lens focuses an image on to ________.

[  ]

A.

the subject

B.

a surface made up of millions of light sensitive elements

C.

a television set

D.

millions of photo electric beams of light

查看习题详情和答案>>

完形填空

The Brick

  

  About ten years ago, a young and very successful manager named Josh was travelling down a Chicago neighborhood street. He was going a bit fast in his 1 car.

  He was watching for kids rushing out from between parked cars. 2 his car passed, no child rushed out, but a brick did and WHUMP! It 3 his shiny black side door! Josh 4 out of his car, grabbed the kid and pushed him up 5 a parked car. He shouted at the kid,“ 6 was that all about and who are you? Just what are you doing?”He went on with 7 “That's my new Jaguar, that brick you threw is going to cost you a lot of money. Why did you throw it?”

  “Please, mister, please…I'm 8 ! I didn't know what else to do!” 9 the youngster.“I threw the brick 10 no one else would stop!”Tears were dripping down the boy's chin as he 11 around the parked car.“It's my brother, mister,”he said.“He rolled 12 the sidewalk and fell out of his wheelchair and I can't 13 him up.”Sobbing, the boy asked the manager,“Would you please help me get him 14 into his wheelchair? He's hurt and he's too heavy for me.”

15   beyond words, he lifted the young man back into the wheelchair and took out his handkerchief 16 wiped the cuts, checking to see that everything was going to be OK. He then 17 the younger brother push him down the sidewalk toward their home.

  

  It was a long and slow walk back to his expensive car. Josh 18 did fix the side door of his Jaguar. He kept the damage to 19 him not to go through life so fast that someone has to throw a brick at him to get his attention. Pay 20 to the bricks of life coming at to you.

  

(1) Aold

  
  

Bexpensive

  
  

Csecondhand

  
  

Dslow

  
  

(2) ASince

  
  

BAfter

  
  

CAs

  
  

DSo  long as

  
  

(3) Astruck

  
  

Bdestroyed

  
  

Cwiped

  
  

Dharmed

  
  

(4) Aclimbed

  
  

Bstepped

  
  

Cgot

  
  

Djumped

  
  

(5) Aagainst

  
  

Bon

  
  

Cwith

  
  

Dtoward

  
  

(6) AHow

  
  

BWhy

  
CWhen   

DWhat

  
  

(7) Aeagerness

  
  

Banger

  
Cpunishment  

Ddispleasure

  

(8) Adiscouraged

  
  

Bdisappointed

  
Csorry  

Dhopeless

  

(9) AExplained

  
  

BCried

  
CShouted  

DAdded

  

(10) Auntil

  
  

Bif

  
  

Cbefore

  
  

Dbecause

  
  

(11) Ahid

  
  

Bpointed

  
  

Cran

  
  

Dsearched

  
  

(12) Afar

  
  

Baway

  
  

Coff

  
  

Donto

  
  

(13) Alift

  
  

Braise

  
  

Chold

  
  

Dpick

  
  

(14) Aover

  
  

Bup

  
  

Cdown

  
 

Dback

  

(15AEncouraged

  
  

BMoved

  
CExcited  

DFrightened

  

(16) Aso

  
  

Bbut

  
  

Cand

  
  

Dor

  
  

(17) Awatched

  
  

Bnoticed

  
  

Csaw

  
  

Dobserved

  
  

(18) Aever

  
  

Bseldom

  
  

Chardly

  
  

Dnever

  
  

(19) Arequire

  
  

Bremind

  
  

Cwarn

  
  

Dkeep

  
  

(20) Alove

  
  

Bturn

  
  

Cattention

  
  

Drespect

  

 

查看习题详情和答案>>

D

 Stonehenge(巨石阵)may have been a prehistoric health center rather than a site for observing stars or a temple in honor of the dead, scientists said yesterday. New evidence unearthed at the World Heritage Site in more than 40 years suggests that the monument was a place where the diseased and injured went in groups, seeking cures.

After a two-week dig, scientists have concluded that Stonehenge was “the ancient healthcare centre of southern England” because of the existence of “bluestones”---the smaller columns of dolerite(辉绿岩)that formed an earlier stone structure.

By dating pieces of remains to around 7330BC, Tim Darvill, of Bournemouth University, and Goff Wainwright, of the Society of Amtiquaries have found that hunter-gatherers were at the site on Salisbury Plain 4,000 years earlier than thought. The first stage of Stonehenge, a round earthwork structure, was built around 3000BC. Professor Wainwright added: “I did not expect the degree of complexity we discovered. We’re able to say so much more about when Stonehenge was built and why---all of which changes our previous understanding of the monument.”

The research reveals the importance of the henge’s famous bluestones. Hundreds of bluestone chips gathered at the site have led the team to conclude that the bluestones were valued for their curing effects---the key reason that about 80 of them, each weighing up to 4 tons and a half, were dragged more than 150 miles from the Preseli Hills to Wiltshire. After years of research, Professors Darvill and Wainwright have concluded that, for thousands of years, the Preseli mountain range was home to magical health centers and holy wells.

Even today there are those who believe in the curing powers of the springs for coughs and heart disease, and people who use crystals and bluestones for self-curing. Radiocarbon tests have also revealed that the construction of the original bluestone circle took place around 2300BC, three centuries later than originally thought. Interestingly, on the same day died the “Amesbury Archer”---a sick traveler from the Swiss or German Alps who had an infected knee---whose remains were discovered about five miles from Stonehenge. The professors believe that he was a devoted religious person who was hoping to benefit from the curing powers of the monument.

63.Stonehenge is recently believed to be a place for people           .

A.to recover from poor health    B.to observe star movements

C.to hold religious ceremonies   D.to gather huge bluestones

64.What can be inferred about Stonehenge from the passage?

A.The springs could cure coughs and heart disease best.

B.The new discovery was the same as what had been expected.

C.Some huge bluestones were not produced at Stonehenge.

D.The original bluestone circle was thought to be constructed around 2000BC.

65.The sick traveler in the passage is supposed to be           .

A.a devoted religious person from Stonehenge

B.one of the earliest discoverers of Stonehenge

C.the first explorer to test the magical power of bluestones

D.a patient trying to cure his infection at Stonehenge

66.Which of the following might be the best title for the passage?

A.Stonehenge: A New Place of Interest     B.Stonehenge: Still Making News

C.Stonehenge: Heaven for Adventurers     D.Stonehenge: Still Curing Patients

 

查看习题详情和答案>>


D
 Stonehenge(巨石阵)may have been a prehistoric health center rather than a site for observing stars or a temple in honor of the dead, scientists said yesterday. New evidence unearthed at the World Heritage Site in more than 40 years suggests that the monument was a place where the diseased and injured went in groups, seeking cures.
After a two-week dig, scientists have concluded that Stonehenge was “the ancient healthcare centre of southern England” because of the existence of “bluestones”---the smaller columns of dolerite(辉绿岩)that formed an earlier stone structure.
By dating pieces of remains to around 7330BC, Tim Darvill, of Bournemouth University, and Goff Wainwright, of the Society of Amtiquaries have found that hunter-gatherers were at the site on Salisbury Plain 4,000 years earlier than thought. The first stage of Stonehenge, a round earthwork structure, was built around 3000BC. Professor Wainwright added: “I did not expect the degree of complexity we discovered. We’re able to say so much more about when Stonehenge was built and why---all of which changes our previous understanding of the monument.”
The research reveals the importance of the henge’s famous bluestones. Hundreds of bluestone chips gathered at the site have led the team to conclude that the bluestones were valued for their curing effects---the key reason that about 80 of them, each weighing up to 4 tons and a half, were dragged more than 150 miles from the Preseli Hills to Wiltshire. After years of research, Professors Darvill and Wainwright have concluded that, for thousands of years, the Preseli mountain range was home to magical health centers and holy wells.
Even today there are those who believe in the curing powers of the springs for coughs and heart disease, and people who use crystals and bluestones for self-curing. Radiocarbon tests have also revealed that the construction of the original bluestone circle took place around 2300BC, three centuries later than originally thought. Interestingly, on the same day died the “Amesbury Archer”---a sick traveler from the Swiss or German Alps who had an infected knee---whose remains were discovered about five miles from Stonehenge. The professors believe that he was a devoted religious person who was hoping to benefit from the curing powers of the monument.
63.Stonehenge is recently believed to be a place for people           .
A.to recover from poor health    B.to observe star movements
C.to hold religious ceremonies   D.to gather huge bluestones
64.What can be inferred about Stonehenge from the passage?
A.The springs could cure coughs and heart disease best.
B.The new discovery was the same as what had been expected.
C.Some huge bluestones were not produced at Stonehenge.
D.The original bluestone circle was thought to be constructed around 2000BC.
65.The sick traveler in the passage is supposed to be           .
A.a devoted religious person from Stonehenge
B.one of the earliest discoverers of Stonehenge
C.the first explorer to test the magical power of bluestones
D.a patient trying to cure his infection at Stonehenge
66.Which of the following might be the best title for the passage?
A.Stonehenge: A New Place of Interest     B.Stonehenge: Still Making News
C.Stonehenge: Heaven for Adventurers     D.Stonehenge: Still Curing Patients

查看习题详情和答案>>


D
  Beyond two or three days,the world’s best weather forecasts are doubtful, and beyond six or seven they are worthless.
  The Butterfly Effect is the reason. For small pieces of weather—to a global forecaster,small can mean thunder—storms and blizzards(暴风雪)—any prediction becomes worse rapidly. Errors and uncertainties increase,from dust devils and storms up to continent-size eddies(旋涡)that only satellites can see.
  The modern weather models work with net-like points sixty miles apart,and even so,some starting data have to be guessed,since ground stations and satellites cannot see everywhere. But suppose the earth could be covered with sensors placed one foot apart,rising at one-foot intervals all the way to the top of the atmosphere. Suppose every sensor gives perfectly accurate readings of temperature,pressure,humidity(温度), and any other data a weatherman would want. Exactly at noon a powerful computer takes all the data and calculates what will happen at each point at 12.01, then 12.02,then 12.03…the computer will still be unable to predict whether Princeton will have sun or rain one month away. At noon the spaces between the sensors will hide fluctuations(波动)that the computer will not know about. By 12.01,those fluctuations will already have created small errors one foot away. Soon the errors will have added to the ten-foot scale,and so on up to the size of the globe.
63.A weather forecast ____________ in the world.
A.is reliable within one or two days
B.is doubtful beyond 24 hours
C.becomes useless beyond two or three days
D.is still worthwhile in seven days
64.Usually there is a weather sub-station____________.
A.in every city           B.every 60 miles
C.between two cities         D.every one foot
65.Which of the following statements is true?
A.People have not placed sensors one foot apart in the atmosphere.
B.Scientists have already put sensors one foot apart in the world.
C.Every sensor gives perfectly accurate data a weatherman wants.
D.Ground weather stations and satellites can see every place on earth.
66.Our computer will not be able to know about fluctuations because ____________.
A.the sensors are not good enough
B.they are hidden by the spaces between the sensors
C.they are too far away
D.they move very fast

查看习题详情和答案>>

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网