新一代大学英语(发展篇)视听说教程1unit2答案

2-1

①ABBBAB

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

5.decreasing in numbers

6.poor countries

7.whole ecosystem

2-2

①1. 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 k, cheese, yoghurt / yogurt / milk, cheese, and yoghurt / yogurt

2.marine algae

3.fish oil supplements

4.eat meat 2-4

①1.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

②1.Bad 2.good 3.plastic 4.cells

municate 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、