stepbystep3000第三冊unit6答案及原文

1、英語專業(yè)學(xué)生經(jīng)典的聽力材料Unit 6 Science and TechnologyPart I Warming upA1.1 This news item is abouta kind of new bulletproof vest made of silk.2. This news item is about research done by American and Japanese researchers to predict severe weather in and around the Indian Ocean.4. This news item is about the sig

2、nificanee of the discovery of the structure of DNA.5. This news item is aboutNEC's new robot that talks and under-stands orders.A21. While silk threads may be soft, they can be used to producea stronger yarn than copper threads.2. American and Japanese researchers have discovered a strong conn e

3、ction between extreme weather and conditions in the ocean.3. Visitors to the site have 24 hours tovote on their counter move helped by a team of young chess experts who will suggest strategies.4. Understanding its code has helped to unlockthe mechanics of iinherited disease,as well as beneficial bio

4、logical traitssuch as intelligence and body strength.Tapescript.1. Thai silk is known for its beauty and elegance. But a research team hasfound a new use for it. A bulletproof vest made of silk was put to the test at a shooting range in Thailand. After several rounds of gunfire, the vest was examine

5、d. The bullets were stuck in the first layer of fifteen pieces of silk. A member of the research team sayswhile silk threads may be soft,they can be used to produce a stronger yarn than copper threads,the material used in regular bulletproof vests.2. American and Japanese researchers say they are a

6、step closer to predicting severe weather in and around the Indian Ocean.Researchers have analyzed weather data from the region over the past 40 years and they've discovered a strong connection between extreme weather and conditions in the ocean. A BBC science correspondent says the findings coul

7、d make it easier to predict droughts or,indeed,periods of heavy rainfall.B.2. lightningpatronizingX rays EnthusiaticLaser BoredYeast Friendly / intimate Friction Loudly but neutral Recycling PatientlyTapescript:5 . they're all types of fungus. There are many different kinds of thembut the best k

8、nown are the ones used in cooking and brewing.When they're mixed with sugar they cause the sugar to ferment and two things happen:first carbon dioxide is given off and second alcohol is formed,but when the proportion reaches 12%, it's all killed off naturally.6 . in contact with each other,

9、there's a resistance to movement betweenthem. The main reason why we use ball bearings and lubricating oil is to counteract this; the main reason why rubber is used in tires and shoes is to increase the effect of it .7 No, its the process whereby materials are used again. Normally, it ischeaper

10、to do this because it's more energy-efficient. On the other hand,one material thafs hard to deal with in this way is plastic - there are so many types that it's very difficult to separate .Part IIA:1.identify, Catalog, map and analyze / 100,0002.A:a piece of DNA, the basic Molecule of lifeB:

11、on chromosomes in every cellsC:produce chemical instructions the cell needs in order to build and run the human bod y.Ill:Sign ificanceA:cure or preventB:C:the brain, consciousness and the mindD:a scientific descriptionIV controversyAbuse 2. warfare囊性纖維變性聽力原文：The goal of the human genome project ini

12、tiated in the early 1990s is to identify,catalog,map and analyze every one of the estimated 100,000genes in the human body. If the multi-billion-dollar project is successful,its effects may be as fundamental to the human future as the discovery of fire and seed agriculture once were.Part III Latest

13、breakthroughs in technologyA.1. What is the trend for electronics in the future?Integrated, smaller, faster, better2. What is the theme for electronics in the future?B.Tapescript:Suzanne Cantra is the "What's New?” editor at Popular Science magazine,a magazine that has been following advanc

14、es in technology for more than a hundred years.The most fan ciful dream of mankind is today a startling reality.HRember when television was considered a fad of the future? "It may not be long before our news events and current world happenings will be witnessed in thousands of homes.H Boy, were

15、 they wrong?And not only that,this sort of smart VCR learns which TV shows and characters you like to watch and records them for you.This device is only one of a hundred items, Cantra says, best represents the future. And while we couldn't show you all of them, here are a few that reflect some o

16、f the new trends.Like Ericsson*s R380.You can make calls, browse the web, check your calendar and send and receive email, all in this one device.”This cell phone actually shows us the future of integrated devices.nAnd I bet you can't guess what this is? Although it looks like a watch, in fact, i

17、t's a camera. That's right. A camera.”The P3wrist camerasort of talks to that whole concept of miniaturization and having devices in teg rated into things that you wouldn't think of.”And while the pictures are pretty good,only you can decide whether they're worthtwo grand.The PC weig

18、hs less than a pound and clips onto your belt. The monitor,about the size of a pen caprests an inch from your eye.But if you don't necessarily wanna work during your down time,something like the Panasonic portable DVD player might be the gadget for you.If you're more the adventurous type, then Casio's GPS watch is a must (to)have.nAfew years down the linejnstead of just having,you know,your coordinates, it can actually tell you where you are on a map and give you directions/1Over the past several years, we'v