新一代大学英语(发展篇)视听说教程1unit2答案

2-1

①ABBBAB

② 1.safer 2. tighter controls 3. Vegetables 4. extinct

5. decreasing in numbers 6. poor countries

7. whole ecosystem

2-2

① 1. organic 2. less than 3. at least 4.95% 5.100%

6. the outdoors 7. natural diet

8. being kept in small cages 9. being raised

2-3

① 1.ACE 2.AC 3.AE 4.A

② 1. milk, cheese, yoghurt / yogurt / milk, cheese, and yoghurt / yogurt

2. marine algae 3. fish oil supplements 4. eat meat

2-4

① 1. their natural state 2. man-made ingredients

3. shelf life 4. hydrogen 5. up to a half gram

6. the same as 7. look old

② 1. Bad 2.good 3. plastic 4. cells

5. communicate or talk 6. cancer 7. packaged foods

8. baked 9. fat 10. desire more

11. high blood pressure

2-5

① 1. chemical fertilizers 2. kill weeds and bugs

3. the supermarkets 4. local farmers

5. more expensive 6. it really comes from

② 1. grow the same crop 2. rains 3. our waterways

4. an organic farmer

5. genetically modified seeds

6. make a difference

2-7

1、BCC

2、