Howlonghas3Dtechnologybeenarou

更新 2022-09-03
科目英语
题型阅读理解
难度中等
浏览 2078

How long has 3-D technology been around? Most of us might think of crowds of teenagers in a 1950’s movie house watching Bwana Devil in 3-D. But 3-D technology made its first appearance on the scene in 1838 with the first stereoscope(体视镜). And the first actual 3-D movie was a 1903 film called Le Ariveed’un Train.
Although it has such a long history, the technology has still remained based on one simple principle-----to make 3-D effects you must find a way to project two slightly different pictures to each eye. Modern 3-D technology works by rapidly flickering(闪动) two versions of the movie and projecting them onto each eye. The brain does the rest of the work, combining the two pictures together into one and giving the show the appearance of depth, the third dimension.
But does this exposure, especially long exposures, cause harm to the child’s developing brain and visual system? Unfortunately, long-term studies on new flicker digital 3-D technology and children aren’t yet available. We do not know if regular or daily 3-D viewing over years affects the developing visual system, although older 3-D methods basically do the same thing and are not considered harmful.
The question of possible harm in modern 3-D use in TV is really based on two facts: the amount of time children will now be watching 3-D TV each day and the sensitivity some children show in reaction to 3-D viewing. It is difficult to make actual lab studies of longer term 3-D viewing in children because of the possible harm of the experiment. Researchers will have to wait until 3-D TV technology is already in the marketplace for a number of years, then check heavy 3-D TV watchers and compare them with non-watchers.
With a 3-D television technology in the home, we will soon be able to answer the question of whether or not longer and more frequent periods of 3-D exposure cause more changes in the visual system. We may find that the bigger problem is the introduction of a new technology that leads to even more time spent on TV rather than playing outdoors.
According to the text, 3-D technology ______

A．was refused by people when it first appeared.

B．will soon change the way we watch TV.

C．does no good to our visual system.

D．has a history of nearly 200 years.

Paragraph 2 is mainly about________

A．how 3-D technology works.

B．why 3-D movies are popular

C．the history of 3-D technology.

D．the influence of 3-D technology.

What’s the method suggested in paragraph 4?

A．To wait and see	B．To carry out lab studies
C．To stop making 3-D movies	D．To improve 3-D technology

The author’s purpose in writing the text is to _______

A．ask children not to watch 3-D movies

B．discuss if 3-D viewing is harmful to children.

C．introduce the advantages of 3-D technology.

D．predict the development of 3-D technology.

登录免费查看答案和解析

相关试题

         I have a friend who lives by a three-word philosophy: seize the moment. Just possibly, she may be the wisest woman on this planet. Too many people put off something that brings them joy just because they haven’t thought about it, don’t have it on their schedule, didn’t know it was coming or are too strict to depart from their routine.
I can’t count the times I called my sister and said, “How about going to lunch in half an hour?” She would gasp and stammer (结结巴巴地说), “ I can’t . I have clothes on the line. My hair is dirty. I wish I had known yesterday. I had a late breakfast. It looks like rain.” And my personal favorite response: “It’s just Monday.” She died a few years ago. We never did have lunch together. From then on, I’ve tried to be a little more flexible.
Life has a way of going faster as we get older. The days get shorter, and the list of promises made to ourselves gets longer. One morning, we awake, and all have to show for our lives is repetition of “I’m going to”, “I plan on” and “someday”, when things are settled down bit.
When anyone calls my “seize the moment” friend, she is open to adventure and available for trips. She keeps an open mind on new ideas. Her enthusiasm for life is contagious. You talk with her for five minutes, and you’re ready to trade your bad feet for a pair of Rollerblades and skip an elevator for a bungle cord.
My lips have not touched ice cream in 10 years. I love ice cream. The other day, I stopped the car and bought a triple-decker. If my car had hit an iceberg on the way home, I would have died happy.
Now…go on and have a nice day. Do something you WANT to…not something on your SHOULD DO list.
72. The example of the writer’s sister serves as ____.
A. an argument        B. an introduction    C. a support              D. a conclusion
73. The writer thinks that the underlined excuse “It’s just Monday.” is acceptable, because ____.
A.it is still likely that they can have lunch together some time later
B.it sounds most reasonable of all the excuses
C.it shows respect for the writer’s suggestion
D.it indicates the time when they can have lunch together
74. The underlined word “contagious” in the fourth paragraph means “______”.
A. appropriate          B. influential                       C. practical                D. evident
75. What did the purpose of the writer by writing this passage?
A. To suggest how time flies.                  B. To persuade busy people to relax.
C. to advise people to keep their promise.
D. To convince readers to be flexible on their schedule for practical joy.

题型：未知
难度：未知

收藏答案/解析

Board, But Not Boring
Roll the Dice and Take a Chance on Something New…
Are you vacationed-out, tired of video-gaming, waterlogged by too many trips to the pool and ready to scream if you see one more “SpongeBob” rerun?
In other words, are you bored with summer?
We’ve got a suggestion: Kill that boredom with some great board boredom games. We went to game expert Lizzy Palmer of Barston’s Child’s Play in the District and ask for suggestions. All the games you see on this page are a ton of fun, she said, and there are sure to be at least one or two that you don’t already have.
Maptangle
Borderline Games
Ages 7 and older, 4 to 6 players, $24.95
This clever take on the classic game of Twister challenges your gymnastic and geographic skills at the same time. A huge floor map of the world serves as the game board. There are lots of geographic elements: countries, oceans, rivers, deserts, even man-made landmarks. A deck of cards tells you where to put one foot, then the other. The round is over when someone falls.
Jungle Speed
Ages 7 and older, 2 to 8
players, $25.99
This is a fast-paced shape-recognition game. A wooden totem (图腾柱) sits in the middle. Players flip (翻) over cards one at a time. When your card matches another, be the first to grab the totem so that you can give your card to the loser. But be careful: Some cards look the same but aren’t!
Enchanted Forest
Ravensburger Ages 6 and older, 2 to 6 players,
$24.99
A classic memory game. Take a winding path through the forest and check under the trees for
fairy-tale treasure. Remember what you saw so that when you need a particular treasure you can
go back to that tree to get it. Cool rule: You can split your dice (骰子) roll—for example, move five spaces in one direction and two in the other to land at the right tree.
Go fish for Wildlife Birdcage Press All ages, $9.95
Birdcage has several decks (副) of cards that are more like trading cards. You fish for sea creatures, reptiles, wild animals. Each deck has instructions for several card games, and each card has great photos and fun facts. Great for a trip.
HedBanz Funrise Ages 6 and older, 2 to 6
players, $13.99
Put on a headband and slip in a card that shows an animal or thing. Everyone else can see it but you.Ask questions until you guess what it is—but do it before time runs out!
68. What’s the purpose of writing the article?
A. To advertise several board games to attract potential consumers.
B. To introduce several board games for readers to pass the summer.
C. To try to persuade readers to give up video games and choose board games.
D. To make some suggestions on how to spend the long summer.
69. Suppose Doris, a mother with a six-year old boy, wants to buy some board games for her child. How many kinds of board games can she choose?
A. 2                     B. 3                              C. 4                              D. 5
70. Which of the following games will be the best choice for Mr Smith who wants to find an indoor game that can benefit both his daughter’s mind as well as her body?
A. Go Fish for Wildlife                                           B. Jungle Speed
C. Maptangle Borderline Games                       D. Hedbanz
71. Which of the following can match the games with their benefits to players?
(1) Enchanted Forest                                    a. to practice your quick response
(2) Maptangle Borderline Games    b. to practice your memory
(3) Jungle Speed                                            c. to practice your geographic knowledge
(4) Go fish for Wildlife                         d. to increase the knowledge about animals
A. bacd                                 B. bcad                       C. cbad                       D. cdab

题型：未知
难度：未知

收藏答案/解析

Some people look at a hole and see empty space. Others see opportunity. That’s what Sheri Schmelzer spotted a few years ago when everyone—including her three children—started wearing Crocs, the colorful shoes dotted with holes.
“My kids and I were clowning around, and my eldest daughter, Lexie, got the sewing kit out. I brought one of the Crocs, pulled some buttons, rhinestones, and fabric out of the kit, and stuck them in the holes. Lexie said, ‘Mom, I love that!’”
Sheri and Lexie, then seven, spent the rest of the day filling holes in the family’s 12 pairs of Crocs. Every look-alike shoe was suddenly unique. When her husband, Rich, experienced in setting up businesses, came home later that day, says Sheri, “I could see the light bulb go on over his head,” Crocs had sold millions of pairs of shoes; the couple figured they could create a business simply by riding the wave. Rich refused to let a decorated Croc leave their Boulder, Colorado, house until he’d filed a patent.
But first they needed a name. “Rich and I had seen a movie where Meg Ryan says to Tom Hanks, ‘I’m such a flibbertigibbet!’ That became my nickname, so I called the business Jibbitz.” While Sheri designed, Rich strategized. They decided to sell the charms through a website, Jibbitz.com<http://www/jibbitz.com.>
Six months later, in February 2006, Sheri was doing so well that Rich left his business to work with her full-time. She was making hundreds of Jibbitz to order, by hand, by herself, in their basement. And filling those holes wasn’t as easy as it looked. The bigger the shoe, the bigger the holes; it took six models before Sheri figured out how to make her charms one-size-fits-all. Later Rich found a way to get plastic Jibbitz manufactured in China.
Someone at Crocs was sure going to notice the charms—after all, the company was headquartered (总部设在) just ten miles down the road. Duke Hanson, one of Crocs’ founders, spotted Lexie and her Jibbitz at the local pool, handed her his business card, and said, “Have your mom call me.”
Sheri and Rich met with Crocs executives, but no one suggested buying the company. Sheri was actually relieved because she wanted to see if she, not Crocs, could make it big. And she did. In December 2006, Crocs bought Jibbitz for $20 million, with the Schmelzers staying on board.
64. The passage is mainly about ____.
A. how the Schmelzers found opportunities out of nothing.
B. how the Schmelzers found opportunities and developed their business
C. how creativity matters to a successful business
D. how the business of Crocs became successful.
65. When Sheri said, “I could see the light bulb go on over his head”, she meant that ____.
A. Rich was really excited               B. Rich liked their shoe charms
C. saw this as a business opportunity
D. Rich wasn’t satisfied with the decorations
66. From Paragraph 5, we can learn that ____.
A. the Schmelzers kept improving to make their business successful
B. Sheri does not trust others when it comes to designing Jibbitz
C. making the products unique is key to business success
D. Rich made a lot of sacrifices for their family business
67. Which of the following is arranged in the right order according to the text?
a. the Schmelzers applied for a patent   b. Crocs’ shoes sold well
c. the Schmelzers set up their website
d. by making their products in China, the Schmelzers spread their business.
A. acdb                       B.bacd                        C. bcad                       D. adcb

题型：未知
难度：未知

收藏答案/解析

Children are being indirectly affected by the impact of the recession (经济衰退) on their parents, the Children’s society warns.
The chief executive of the Children’s Society, Bob Reitemeier, said that children were “on the front of recession”. He said the recession made it even more important to try to end child poverty.
The answers suggest children from poorer backgrounds are more likely to be affected, but over a third of children across all backgrounds said they were aware that the recession was worrying their parents.
Fifteen-year-old Patricia said her family felt the impact of the recession on their everyday budget. “We have to save up our money and do not spend it so much on unnecessary things,” she said.
Those questioned appeared to have great awareness of the economic crisis, which, unsurprisingly, was higher among the older children. But around 15% said they hadn’t been affected by it.
Recent figures showed that in 2007 there were 850,000 young people with no particular occupation. An official from the government said it was so “disappointing” that some young people were concerned about the economy.
Parents are clearly best placed to talk to their children about their worries, but schools also play an important role in teaching young people the skills they need to become healthy, happy and confident individuals.
60.Which of the following is true?
A. It is more important to try to end child poverty in the recession.
B. Children from poorer areas are less likely to be affected.
C. All the children questioned are worried about the economy.
D. That some young people are worrying about the economy is “good news”.
61.What does the underlined word “it” refer to in Paragraph 5?
A. The poorer background. B. The impact of the recession.
C. Everyday budget. D. The government.
62. What’s the main idea of the passage?
A. Many children are concerned about the recession.
B. Children are being directly affected by the recession.
C. The recession influenced children indirectly.
D. Schools play an important role in teaching young people how to become healthy, happy and confident individuals.
63. Which of the following can be inferred from the passage ?
A. The writer is very disappointed that so many people are out of job.
B. families and teachers should teach children the value of budgeting
C. Children are not supposed to know too much about the impact of the recession
D. Children with good personalities deal with the impact of recession better.

题型：未知
难度：未知

收藏答案/解析

It is midnight on September 22, 2012. The sky above Manhattan，New York is filled with a curtain of colorful light. New Yorkers are fascinated by the beautiful aurora (极光). However, their fascination is short-lived.
Within a few seconds, electric bulbs dim and flicker (闪烁), then become unusually bright for a few seconds. Then all the lights go out. Within 90 seconds, the entire eastern half of the US is without power.
Besides the US, Europe, Japan and China are also hit by the same terrible event. It is a violent solar flare (太阳耀斑) ,150 million kilometers away on the surface of the sun.
Science fiction? No. A report funded by NASA and issued by the US National Academy of Sciences in January this year says it could happen.
A massive solar flare is most likely on a spring or autumn night in 2012, according to the report.
Solar flares are huge explosions on the surface of the sun. In a matter of just a few minutes they heat material to many millions of degrees and release as much energy as a billion megatons (百万吨) of TNT explosives. Solar flares release a stream of charged high-energy particles (粒子). They are called “solar winds”.
If one solar “wind” should hit the Earth’s magnetic shield (磁场), the result could be terrible for humans.
But there’s no need to run for cover from solar winds. They do not harm life on Earth, they only affect the way we live, especially since we depend so much on modern technology. They can pump extra electricity into power lines and pipelines, causing blackouts and fuel leaks. Solar winds are also known to affect mobile phone operations and may disrupt wireless Internet services.
Moreover, solar winds can prevent normal satellite operations, and disrupt radio communications and navigation systems such as the Global Positioning System.
Auroras are powered by solar wind. This wind blows past the Earth at about 400-700 km per second and creates storms in the Earth’s magnetic environment. In the polar regions these explode into southern or northern polar lights.
The most serious solar storm that hit Earth in history happened in 1859. It caused the failure of telegraph systems in Europe and North America.
So, for humans, the sun is a double-edged sword. Without the sun, there would be no life on Earth. Without the sun, Earth would be a frozen dark ball floating in space. However, on the other hand, the sun can disorder our lives from time to time.
56. What is the main idea of the passage?
A. It introduces to readers the advantages and disadvantages of the sun.
B. It describes a science fiction set in Manhattan on 22 September 2012.
C. It shows readers the way in which solar winds form inside the sun.
D. It explains what solar flares are and their effects on human life.
57. The first two paragraphs are written ____.
A. to show a beautiful scene in a true story
B. to describe the beautiful scenery of Manhattan
C. to describe the power problem around the world
D. to introduce the topic of this passage
58. What can we conclude from the passage?
A. Solar flares will do great harm to those who are using the Internet.
B. Solar flares cannot reach as far as the polar regions.
C. Solar flares are huge explosions that happen inside the sun.
D. But for our reliance on technology, solar flares wouldn’t
affect us so much.
59. Solar winds will likely affect us in the following ways EXCEPT that ____.
A. normal satellite operations will be stopped
B. the lights in the areas affected will go out at the same time
C. people on the streets will be struck to death
D. some navigation systems will be out of order

题型：未知
难度：未知

收藏答案/解析

推荐套卷

热门套卷