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18.Pupils remember more and behave better when 3D images are used in lessons,research suggests.They are quicker to learn and absorb new concepts,and display higher levels of concentration.
Professor Anne Bamford,of the University of the Arts,London,studied the effectiveness of 3D content in 15schools across seven countries,including the UK.Pupils in 3D classes can remember more than those in the 2D classes after four weeks,improving test scores by an average of 1 7percent compared with eight percent for 2D lessons.They gave more detailed answer to the tasks and were more likely to think in 3D,using hand gestures and mime(模仿动作) to answer the test questions successfully.
The teachers commented that the pupils in the 3D groups had deeper understanding,increased attention span,more motivation and higher engagement in the lessons.
Children are used to 3D with the rise of computer games that use the technology-90percent of those in the study had seen a 3D film.Schools would need 3D-enabled projectors(投影仪),laptops with good picture capabilities,3D software and glasses for children to introduce animations(动作) into classrooms.
But Danny Nicholson,an educationist,said the technology would be impractical to use in
schools and could be costly.He said,"While I think the idea of 3D technology is very interesting,
I worry that 3D is a bit of an expensive gimmick(小玩意儿).There are a few cases where a true 3D image might help,but most of the time,good 2D models that can be moved would be just as effective."
In the US,one school district in Colorado is already in the process of having 1.000 3D projectors fixed in classrooms.And the University of Caledonia,which carries out scientific research into the Lake Tabon Basin  has used 3D presentations with Grade Six pupils.Those who watched the 3D presentations were more engrossed and reported a general increase in their interest in science compared with students who watched the 2D version.
25.What is the main idea of the first three paragraphs?B
A.There are slight differences between 3D and 2D images.
B.Pupils perform better when 3D images are used in classes.
C.Schools have difficulties in making full use of 3D technology.
D.3D technology is always more effective than 2D technology.
26.Danny Nicholson holds the view that 3DD.
A.is of no help in classes  
B.has a bright future in classes
C.is more practical than 2D models  
D.may not be affordable for schools
27.What can we learn from the last paragraph?D
A.3D technology will replace 2D models in the future.
B.Many pupils are now more Interested In science than before.
C.Teachers will use the 3D technology through specific training.
D.3D will soon be put into use in one school district in Colorado.
28.The underlined word"engrossed"in the last paragraph meansA.
A.absorbed     B.annoyed   C.relaxed      D. confused.

分析 本文讲述了3D影响在教学中的应用,虽然有人提出反对意见,但研究表明了3D用于教学的有效性,提高了教学效果:提高了学生的记忆效果、理解能力和接受能力,而且在美国的科罗拉多州的一个学校已经投入使用.

解答 25.B 细节理解题. 据第一段:当3D影像在课上使用时小学生们能够记得更多,表现更好,他们学的更快,接收新知识更快,更能集中精力.所以B正确.
26.D 细节理解题.根据第四段前两句But Danny Nicholson,an educationist,said the technology would be impractical to use in schools and could be too expensive.He said,"While I think the idea of 3D technology is very interesting,I worry that 3D is a bit of an expensive gimmick (小玩意儿)得出D正确.
27.D 细节判断题.根据最后一段第一句话In Colorado,the US,one school district is already in the process of having 1,000 3D projectors fixed in classrooms.得出D正确.
28.A词意猜测题.通过最后一段最后一句话"Those who watched the 3D presentations were more engrossed and reported a general increase in their interest in science compared with students who watched the 2D version."大家各抒己见观看3 d演示更全神贯注,增加了一般与学生相比,他们对科学的兴趣观看了2 d版.结合选项,可知.故选A.

点评 本文是一个新闻报类阅读理解,题目涉及多道细节理解题,做题时结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案,切忌胡乱猜测,一定要做到有理有据.

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