大学英语视听阅读3--home-listening答案

IV. 1. Caring for these creatures has become an enormously entertainining and educational hobby.

2. Tarantulas are not aggressive unless threatened by an abrupt motion. 3. During the process, the spider’s soft inner body is temporarily exposed and it can easily be injured or killed.

4. It is essential not to distureb the spider during this process. 5. A screen cover is fine as long as it can be secured. Unit 2 I. DFBECA

II. Expressive, displaced, priority, transmitters, coincidence

III. 1. In the early 1900s, a demand for coats made from the fur of koalas threatened to destroy the entire species.

2. In the 1930s the Australian government passed legislation to protect koalas.

3. The information showed which koalas were perment residents and which were visitors.

4. Since koalas have favorite paths between food trees, all fences were raised to allow them to pass easily underneath. 5. This bonus has increased homeowners’ excitement over this outstanding wildlife-feiendly community more than expected. Unit 3 I. BCDA

II. Benefits, galleries, abandoned, attract, atmosphere, rel eatate, restore, base

III. 1. I advocate a radical proposal to turn things around.

2. Let’s declare the four block area to the north of Main Street a pedestrian-only zone.

3. Instead of going to anther city for entertainment, people may start making downtown Albion their free-time destination. 4. New pulbic transportation options could encourage people to leave their cars at home and provide the city with additional income.

5. When they brought in their pedestrian-only zone in 2003, the changes were dramatic. Unit 4 I. BDAC II. TFFTF Unit 5

I. A-3 B-2 C-1 II. FTTTFFF

III. 1. There are seveal differing theories about what happened to the dinosaurs.

2. It caused enormous clouds of dirt and dust to cover the sky, blocking out the sun and causing the temperature on Earth to fall greatly. 3. Other scientists have somewhat different interpretations.

4. He theorizes that thses changes contributes to the global extinctin of plant and animal species.

5. Other scientists hold very different theories and it will probably be many years before the debate is resolved completely. Unit 6 I. BACD II. FTFFT

III. 1. He became particularly interested in wild animals, such as snakes and reptiles.

2. Since then, Martin has continued to do important research in the field of herpetology.

3. Meanwhile, he continues to develop the academic side of his career. 4. He does this primarily through camps and other educational programs. 5. They learn how to identify various snakes and even get an opportunity to learn safe handling techniques. Unit 7

I. Zion National Park: 370, climbing, mountain and canyond, narrow, deep Copper Canyon: Mexico, 560, climbing and hiking possibilities, horse or donkey, small, isolated The Blue Mountains: an hour, accessible and fascinating, walk, hike, swim, magnificent, amazing II. 1. Participants begin at the heart of a canyon and follow it to a number of unpredictable adventures along the way.

2. If you like excitement and you are felling strong and fit, let canyoneering take you to another sporting dimension!

3. Zion offers a wide variety of climbing opportunities for everyone from the five-year-old beginner to the conditioned expert. 4. About 2.5 million people visit the park annually and leave with memories that will last a lifetime.

5. Few places in the world offer such beauty and variety of scenery in such a brief tour. Unit 8

I. 1-B 2-C 3-A

II. Commercial, economic, investment, prospective III. 1. During the Apollo 8 space exploration flight, astronauts sent back space images that were then shown on television.

2. He was able to buy himself a visit to the International Space Station for seven days, travelling aboard a Russian spacecraft.

3. Although both the airlines and potential passengers have remained committed to the idea, private sector development has been very slow. 4. The final issue remains: is space flight really a safe undertaking for relatively untrained people? 5. Passenters will be required to have physical tests and go on a three-day training program before launch. Unit 9 I. CDAB II. FTTF Unit 10 I. CBDA II. TFTFT

III. 1. One quarter of the medicines are derived from plants, and there are lots of possiblities ot discover useful plant-based drugs.

2. So, researchers are searching for rain forest plants that could be potential sources of new drugs.

3. Only recently have scientists begun to realize how helpful the traditional practices may be to their research.

4. Modern medicine has made good use of this drug..

5. It was originally found only on a small island off the coast of Africa.