大学英语听力教程第三册答案主编张民伦

《英语听力教程3》答案与听力材料

呵呵....考试一路顺风......

UNIT 1

A.

B. Keys:Part I Getting ready

1: burning of the forests/tree removal (deforestation)/reduction of the world's rain forests

2: global warming/greenhouse effect/emissions of CO2

Part II The Earth at risk (I)

A. Keys:

1.

a. More people--------?more firewood----?fewer trees

b. More domestic animals------?more plants-----?fewer available plants

a, b--? More desert----?move south-----?desrtt expanding south----?no grass

2. Growing crops stabilize soil, without them the top soil just blows away. But if there isn't enough rain the crops don't grow.

3. People try to grow food to support themselves or to create ranches where cattle can be raised, or to get hardwood for export,

相关推荐
相关主题
热门推荐