Tomovevisualtechnologyintothefuture,sometimesithelps...

問題詳情：

    To move visual technology into the future, sometimes it helps to make a little noise. Researchers have used sound waves to produce floating 3-D images, create a sense of touch and even supply a soundtrack.

Since the 1940s, scientists have toyed with the concept of acoustic levitation(聲懸浮), the use of soundwave vibrations to trap tiny things in midair. The technology has gained greater capabilities in the past decade. Some researchers believe this improvement could lead to applications such as contributing to novel 3-D printing methods, or creating displays that would be visible from any angle without requiring a screen.

Other researchers have also worked on visual displays that use acoustic levitation. In addition to visuals, the system can also produce audible noise to give the display a soundtrack. And the ultrasound speakers can also concentrate vibrations in one spot so that a finger might feel a sense pushing back—a little like the object shown by the floating image is really there. Soundwaves create a 3-D display!

Display without a screen is remarkably useful. It means that everybody in the room can see the image—any angle, location—and that’s extremely helpful. As a communications system, such a display might one day allow users to chat with a 3-D projection(投影) of a person who can turn his or her head to follow as they move around a room.

The display will require a lot more work before you can install it in your living room, however. So far, this has been done in the research laboratory. We need to push it a little bit harder. We need to do more analysis to see if it would make sense to create a real display that people would have at home. The current system can only show simple graphics, such as a smiley face or figure eight, in real time.

Still, we are optimistic about the potential for this type of technology. If the system had only one speaker-covered surface instead of two, it could generate images that are bigger than the device itself. We can’t make a TV image that’s bigger than the TV—even a projector has to have a projection screen that’s bigger than the image itself. But with a volumetric(容積的) display, a small, portable device might produce a much larger picture. We can imagine, in the future, having volumetric displays in watches, for example, that create large images that just project out of your watch.

80．From the first two paragraphs soundwave vibrations can be used to _________.

A．catch very small objects in midair

B．develop 3-D printer’s capabilities

C．replace a creative display screen

D．compose soundtracks by making no noise

81．What do we know about display without a screen?

A．It has resulted in visual technology.

B．It is possible to see the image from any direction.

C．It is already ripe to create a real one at home.

D．It has yet to be tested in the research laboratory.

82．What does the last paragraph mainly talk about?

A．Outlooks for the new technology.

B．Situations of the modern technology.

C．Praise for the cutting-edge technology.

D．Room for the technical improvement.

83．What can be a suitable title for the passage?

A．Hearing Is Seeing—Sound Waves Create a 3-D Display

B．Seeing is Believing—3-D Printing Methods Arrive

C．Advancing Sense of Touch—3-D Images Float in the Air

D．Promoting TV Technology—Chat with 3-D Projections

【回答】

80．A

81．B

82．A

83．A

【分析】

這是一篇說明文。主要說明了研究人員利用聲波產生漂浮的3-D影象，創造觸覺，甚至提供背景音樂。使用聲懸浮的視覺顯示器可以讓人們從任何方向看到影象。但是實現這一技術在家裡安裝仍然需要很多工作，儘管如此，人們仍然對這種技術的潛力持樂觀態度。

80．細節理解題。根據第二段第一句Since the 1940s, scientists have toyed with the concept of acoustic levitation, the use of soundwave vibrations to trap tiny things in midair.(自20世紀40年代以來，科學家們一直在玩弄聲懸浮的概念，即利用聲波振動將微小物體困在半空中)以及前面兩段的內容可知，聲波振動可以用來捕捉空中的非常小的物體。故選A。

81．細節理解題。根據第四段中It means that everybody in the room can see the image—any angle, location—and that’s extremely helpful.(這意味著房間裡的每個人都能看到影象——任何角度、位置——這非常有幫助)可知，沒有螢幕的顯示可以從任何方向看到影象。故選B。

82．主旨大意題。根據最後一段中We can imagine, in the future, having volumetric displays in watches, for example, that create large images that just project out of your watch.(我們可以想象，在未來，在手錶上有容量顯示器，例如，可以建立大的影象，從你的手錶裡投影出來)以及首句Still, we are optimistic about the potential for this type of technology.(儘管如此，我們仍然對這類技術的潛力持樂觀態度)可知，段落主要內容為討論未來新技術的可能*，可知最後一段主要討論了對新技術的展望。故選A。

83．主旨大意題。根據第一段中Researchers have used sound waves to produce floating 3-D images, create a sense of touch and even supply a soundtrack.(研究人員利用聲波產生漂浮的3-D影象，創造觸覺，甚至提供背景音樂)以及文章主要內容為說明使用聲懸浮視覺顯示器，可以讓人們從任何方向看到影象。故A選項“聽覺就是視覺——聲波產生三維顯示”概括文章大意，是最佳標題。故選A。

【點睛】

概括主旨的方法是：先看首尾或各段開頭再看全文找主題句，若無明顯主題句，就通過關鍵詞句來概括(如議論文中尋找表達作者觀點態度的詞句，記敘文尋找概括情節和中心的動詞或反映人物特點的形容詞)。文中出現兩種或兩種以上的不同觀點時，務必牢記作者的觀點才是體現全文中心的。如第四小題，根據第一段中Researchers have used sound waves to produce floating 3-D images, create a sense of touch and even supply a soundtrack.（研究人員利用聲波產生漂浮的3-D影象，創造觸覺，甚至提供背景音樂）以及文章主要內容為說明使用聲懸浮視覺顯示器，可以讓人們從任何方向看到影象。故A選項“聽覺就是視覺——聲波產生三維顯示”概括文章大意，是最佳標題。故選A。

知識點：興趣與愛好

題型：閱讀理解