銆婅嫳璇惉鍔涙暀绋?/p>
3
銆嬬瓟妗堜笌鍚姏鏉愭枡
鍛靛懙
....
鑰冭瘯涓�璺『椋?/p>
......
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,