step_by_step3000第三册unit1答案及原文(20)

severe weather in and around the Indian Ocean.

3. This news item is about a chess match between a world champion and the rest of the world on the Internet.

4. This news item is about the significance of the discovery of the structure of DNA.

5. This news item is about NEC's new robot that talks and under-stands orders.

A2

1. While silk threads may be soft, they can be used to produce a stronger yarn than copper threads.

2. American and Japanese researchers have discovered a strong connection between extreme weather and conditions in the ocean.

3. Visitors to the site have 24 hours to vote on their counter move helped by a team of young chess experts who will suggest strategies.

4. Understanding its code has helped to unlock the mechanics of inherited disease, as well as beneficial biological traits such as intelligence and body strength.

5. The robot from NEC can record and send video mail through the Internet and switch on TVs, VCRs and air conditioners.

Tapescript.

1. Thai silk is known for its beauty and elegance. But a research team has found 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 examined. The bullets were stuck in the first layer of fifteen pieces of silk. A member of the research team says while silk threads may be soft, they can be used to produce a stronger yarn than copper threads, the material used in regular bulletproof vests.

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