5.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 1838with the first stereoscope(體視鏡).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(閃動) 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.
8.According to the text,3-D technologyD
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.
9.Paragraph 2is mainly aboutA
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.
10.What's the method suggested in paragraph 4?A
A.To wait and see
B.To carry out lab studies
C.To stop making 3-D movies
D.To improve 3-D technology
11.The author's purpose in writing the text is toB
A.a(chǎn)sk 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.
分析 本文介紹了3-D技術(shù)有很長的歷史,不僅給我們帶來了視覺上的享受同時也給孩子們帶來了一些負(fù)面影響,孩子們看電視的時間要比戶外運動時間長.
解答 8.D.細(xì)節(jié)理解題.由文中的"3-D technology made its first appearance on the scene in 1838 with the first stereoscope(體視鏡)."可知,3-D技術(shù)大概有200年的歷史了,故選D.
9.A.段落大意題.文章第二段.But 3-D technology made its first appearance on the scene in 1838 with the first stereoscope主要介紹的是如何形成3-D影像的,故選A.
10.A.細(xì)節(jié)理解題.由該段最后一句話"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."可知,辦法就是等待,然后觀察,故選A.
11.B.寫作意圖題.根據(jù)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可知作者寫本文的意圖是為了討論觀看3-D影片是否對孩子有害.答案為B.
點評 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力,做細(xì)節(jié)理解題時一定要找到文章中的原句,和題干進(jìn)行比較,再做出正確的選擇.在做推理判斷題不要以個人的主觀想象代替文章的事實,要根據(jù)文章事實進(jìn)行合乎邏輯的推理判斷.