精英家教网 > 高中英语 > 题目详情

  Many people believe the glare(炫目的光)from snow causes snowblindness. Yet, with dark glasses or not, they find themselves suffering from headaches and watering eyes, and even snowblindness ,when exposed to several hours of“ snow light”.
  The United States army has now determined that glare from snow does not cause snowblindness in troops in a snow -covered country. Rather ,a man’s eyes frequently find nothing to focus on (聚集) in a broad space of snow- covered without- grass land. So his gaze continually moves and jumps back and forth over the entire landscape in search of something to look at. Finding something, hour after hour, the eyes never stop searching and the eyeballs become tired and the eye muscles ache. Nature makes up for this discomfort by producing more and more fluid (流 体) which covers the eyeball. The fluid covers the eyeball in increasing quantity until it makes eyes difficult to see dearly, and the result is total, even though for a short time, snowblindness.
  Experiments led the Army to a simple method of overcoming this problem. Scouts(侦察兵)ahead of the troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow - covered landscape. Even the scouts themselves throw lightweight, dark - colored objects ahead on which they can focus too. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching the snow -blanketed landscape. By focusing their attention on one object at a time. the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a continuous white land is overcome.


  72.To prevent snowblindness caused by the strong light from snow, wearing glasses or not ________.
  A. depends on whether the snow is white enough
  B. makes no difference
  C. makes much difference
  D. depends on whether the snow is thick
  73.When the eyes are tired, tears flow out ________.
  A. to clear the vision
  B. to make the eyes stop searching
  C. to make the vision unclear
  D. to produce more and more liquid
  74.Snowblindness can be avoided ________.
  A. by moving one’s gaze back and forth
  B. by walking ahead and keeping looking around
  C. by making up for the discomfort of one’s eyes
  D. by providing the eyes with something to focus on
  75.What is the probable meaning of the underlined part “Their gaze is arrested” (in paragraph 3 ) ?
  A. They get something to look at.
  B. They can only look at one spot.
  C. Their eyes are clear.
  D. They can’t see freely.

  72.B 第一段提到戴不戴眼镜都会产生“雪盲”的症状,如头疼,流泪甚至雪盲。
  73.C 第二段结尾部分说此时泪水流出来充满眼眶,眼睛看不清,导致雪盲。
  74.D 第三段提到的侦察兵的做法告诉我们,雪盲的产生是因为在雪地里眼睛找不到具体目标,由于寻找不到看的物体才产生雪盲。人们就将灌木上的雪去掉,扔一些深色物体,其目的是D。
  75.A 划线句子后面说“眼睛盯着灌木,找到东西可看”,因此选A。

练习册系列答案
相关习题

科目:高中英语 来源: 题型:阅读理解

Every people has its own way of saying things, its own special expressions. Many everyday American expressions are on colors.

Red is a hot color. Americans often use it to express heat. They may say they are red hot about something unfair. When they are red hot they are very angry about something. The small hot tasting peppers found in many Mexican foods are called red hots for their color and their fiery taste. Fast loud music is popular with many people. They may say the music is red hot, especially the kind called Dixieland jazz.

Pink is a lighter kind of red. People sometimes say they are in the pick when they are in good health. The expression was first used in America at the beginning of the twentieth century. It probably comes from the fact that many babies are born with a nice pink color that shows that they are in good health.

Blue is a cool color. The traditional blues music in the United States is the opposite of red hot music. Blues is slow, sad and soulful. Duke Ellington and his orchestra recorded a famous song – Mood Indigo – about the deep blue color, indigo. In the words of the song: “You ain’t been blue till you’ve had that Mood Indigo.” Someone who is blue is very sad.

The color green is natural for trees and grass. But it is an unnatural color for humans. A person who has a sick feeling stomach may say she feels a little green. A passenger on a boat who is feeling very sick from high waves may look very green.

Sometimes a person may be upset because he does not have something as nice as a friend has, like a fast new car. That person may say he is green with envy. Some people are green with envy because a friend has more dollars or greenbacks. Dollars are called greenbacks because that is the color of the back side of the paper money.

The color black is used often in expressions. People describe a day in which everything goes wrong as a black day. The date of a major tragedy is remembered as a black day. A blacklist is illegal now. But at one time, some businesses refused to employ people who were on a blacklist for belonging to unpopular organizations.

If you had your wallet stolen while doing some shopping, you may call it        .

A.a white day      B.a black day      C.a red day  D.a green day

Suppose a Mr. Brown says he is very happy because his three children are all in the pink, this means all his children are         .

A.lucky and wealthy   B.gentle and modest

C.fit and healthy         D.creative and energetic

When she got home and found nothing had been done by her husband, Jane was really      .

A.red hot     B.green C.blue  D.black

In the following paragraph, the writer might tell the reader something about         .

A.unpopular polarizations in the world

B.people’ response towards a black day

C.the influence of the traditional blues

D.more words about color, such as brown

查看答案和解析>>

科目:高中英语 来源: 题型:阅读理解

完形填空(共20小题;每小题1.5分,满分30分)

In the north of Scotland there is a lake called Loch Ness. It is the biggest   36   in Britain. It is over thirty kilometers 37 and in some places nearly 300 meters deep . It is cold and dark and not many people went there until after 1930. Then a road was made   38   the lake.

     Holiday makers began to use the road, and this was when the   39   began. Someone said that he had seen a monster(怪兽) in the lake. He said it was twelve meters long. It had a long   40  and a small head. Then someone else said he had seen  41  . Others said the same thing and in 1933 a London doctor took a  42  . It  43   like a monster with a long neck and a thick body but the photo was not too   44 . The newspapers printed the picture and   45   it the Loch Ness monster, or "Nessie".

     Then the argument(争论) began.   46 people, however, were certain there was something living in the lake. Others said there was   47  there.

     In 1961, a lot of people joined together to make a real  48   to see and photograph the monster to find   49  there was one! Several times people thought they saw something but after ten years there was  50   no real proof (证据).

     Later underwater television cameras were used, but   51   found any real proof. However, they   52  find something interesting: a huge underwater cave. It was big enough to be   53   of a monster, but of course, this was not a proof.

     In 1975, however, some American scientists  54  a search group. They used an underwater camera. It took pictures every seventy seconds. Some of the pictures seemed to show a red-brown creature. Its body was about four meters long  55   had a very ugly head on the end of a four -meter neck. Many people then began to believe in the monster. But even today we can't be certain.

A. river                  B. ocean                C. sea             D. lake

A. wide              B. tall               C. long               D. high

A. in                B. over                 C. around          D. above

A. accidents         B. meetings             C. sayings              D. stories

A. eye               B. ear               C. nose                D. neck

A. it                 B. one                  C. some                 D. all

A. photo               B. map             C. gun                  D. chance

A. sounded             B. looked            C. feel                D. would

A. clean             B. clear                C. taken            D. shown

A. called             B. believed             C. thought              D. regarded

A. Some                B. More                 C. All                  D. No

A. nothing           B. anything             C. monsters             D. everything

A. effort                 B. thing                C. interest             D. trip

A. so                 B. but                  C. as                   D. if

A. even              B. still                C. also            D. yet

A. someone            B. no one               C. anyone               D. we

A. did                B. really               C. were                 D. actually

A. room              B. house                C. home                 D. ground

A. found              B. formed(组成)       C. invited           D. get

A. but               B. or                C. and            D. however

查看答案和解析>>

科目:高中英语 来源: 题型:阅读理解

ARLANDA, Sweden (Reuters Life!)—Many people hate the idea of having to sleep on a plane. But Swedish entrepreneur Oscar Dios thinks they can be persuaded otherwise and he has created a new kind of hostel to prove it.

Dios says it is the world’s first jumbo (unusually large) jet hostel, an actual jet-plane at Sweden’s main airport outside Stockholm which has been changed into a 25- room guesthouse that sleeps as many as 72 people.

“I learned about this plane that was standing deserted at Arlanda airport and I’ve been trying the concept of hostels in many different houses and buildings,” he told Reuters. “I thought, ‘Why not a plane?’”

Jumbo Hostels opened for business on Thursday, giving customers the chance to check in and sleep in a room that can best be described as comfortable.”

“The most challenging part with this project is trying to build something inside a metal hull(壳) – it’s just really, really tight.”

The jet, which was originally produced for Singapore Airlines, was taken out of service in 2002. It is held on a concrete foundation with the landing gear secured in steel cradles.

One feature of the hostel is its price – a room starts at 350 Swedish crowns (about $ 41), which is a lot less than hotel rooms outside of major airports.

Another feature is that customers can get married on the wing of the plane and stay in the plane’s more luxurious honeymoon suite (套房).

Instead of walking down the aisle in the church, lovebirds can take what Jumbo Hostels calls the “wing walk,” where they can be joined in great happiness at the wing tip. The hostel has someone ready to perform the ceremony.

But in some respects this hostel remains a plane – most customers have to share the jet’s nine bathrooms and the staff only wear air host and hostess outfits. The only room that has its own bathroom is the honeymoon suite.

Which of the following is not true?

A. The jet plane was out of use for over eight years

B. The hostel provides ten bathrooms for customers

C. The rooms in the hotel are comfortable

D. The hostel lies at Arlanda airport in Stockholm

One of the features of the plane hostel is that         .

A. air hostesses can offer good service

B. a wedding ceremony can be held on the wing    

C. customers can sleep in comfortable rooms      

D. the staff can have a “wing walk”

Why does Oscar Dios make jet plane hotel?

A. Because he is fond of plane very much.

B. Because he is very curious

C. Because he wants to earn more money.

D. Because he likes trying the concept of hotel in many different things.

The writer mainly wants to          .

A. call on people to make use of the deserted things

B. describe a wonderful place for weddings

C. introduce a new kind of hostel    

D. prove people can sleep on a plane  

查看答案和解析>>

科目:高中英语 来源: 题型:

Many people have been ill from a strange disease these days,______we’ve never heard of before.

    A. one    B. that   C. it    D. this

查看答案和解析>>

科目:高中英语 来源: 题型:阅读理解

Thirty- two people watched Kitty Genovese being killed right below their windows. She was their neighbor. Yet none of the 32 helped her. Not one even called the police. Was this in gunman cruelty? Was it lack of feeling about one’s fellowman?

  “Not so,”say scientists John Barley and Bib Fatane. These men went beyond the headlines to research into the reasons why people didn’t act. They found that a person has to go through two steps before he can help. First he has to notice that is an emergency(紧急情况). Suppose you see a middle-aged man fall to the side - walk. Is he having a heart attack? Is he in a coma(昏迷) from a headache? Or is he about to sleep off a drunk? Is the smoke coming into the room from a leak(漏洞)in the air conditioning? Is it “steam pipes”? Or is it really smoke from a fire? It’s not always easy to tell if you are faced with a real emergency. Second, and more important, the person faced with an emergency must feel personally responsible(负责任的). He must feel that he must help, or the person won’t get the help he needs.

  The researchers found that a lot depends on how many people are around. They had college students in to be “tested.”Some came alone. Some came with one or two others. And some came in large groups. The researchers started them off on the “tests.”Then they went into the next room. A curtain divided the “testing room”and the room into which they went. Soon the students heard a scream, the noise of bookshelves falling and a cry for help. All of this had been prerecorded on a tape recorder.

  Eight out of ten of the students taking the test alone acted to help. Of the students in pairs, only two out of ten helped. Of the students in groups, none helped.

  In other words, in a group, Americans often fail to act. They feel that others will act. They, themselves, needn’t. They do not feel any direct responsibility.

  Are people bothered by situations where people are in trouble? Yes. Scientists found that the people were shocked, they sweated, and they had trembling hands. They felt the other person’s trouble. But they did not act. They were in a group. Their actions were shaped by the actions of those they were with.

60. The purpose of this passage is ________.

 A. to explain why people fail to act in emergencies

 B. to explain when people will act in emergencies

 C. to explain what people will do in emergencies

D. to explain how people feel in emergencies

61. Which of the following is NOT true?

  A. When a person tries to help others, he must be clear that there is a real emergency.

  B. When a person tries to help others, he should know whether they are worth his help.

  C. A person must take the full responsibility for the safety of those in emergencies if he wants to help.

  D. A person with a heart attack needs the most.

62. The main reason why people fail to act when they stay together is that ________.

  A. they are afraid of emergencies

  B. they are not willing to get themselves involved

  C. others will act if they themselves hesitate

D. they do not have any direct responsibility for those who need help

63. The author suggests that ________.

  A. we shouldn’t blame a person if he fails to act in emergencies

  B. a person must feel guilty if he fails to help

  C. people should be responsible for themselves in emergencies

D. when you are in trouble, people will help you anyway

查看答案和解析>>

同步练习册答案