基础英语2第八单元练习答案
2012-04-18 17:03阅读：
Unit 8 Focus on Global Warming
Text comprehension
I. A
II. 1. T;
2. T; 3. F; 4. F;
5. F.
III.
1. Paragraph 2. Because
global warming may be the
single largest threat to our
planet（the
earth）.
Low-lying nations could be awash in seawater, rain and drought
patterns across the world could change, hurricanes could become
more frequent, and El Ninos could become more intense.
2. Paragraph 3.
Our factories, power plants,
and cars burn coal and gasoline and spit out carbon
dioxide, produce methane by allowing our trash to
decompose in landfills and by breeding
large herds of methane-belching cattle, and release
nitrogen oxide by using nitrogen-based fertilizers.
3. Paragraph 4.
The increased
concentrations of greenhouse gases prevent additional
thermal radiation from leaving the Earth, so cause the
global warming.
4. Paragraph 7. A slight
increase in heat and rain in equatorial regions would
increase vector-borne带菌媒介引起的
diseases such as malaria; more
intense rains and hurricanes could cause more severe flooding and
more deaths in coastal regions and along riverbeds; even a
moderate rise in sea level could threaten the
low-lying islands; hotter summers could lead
to more cases of heatstroke, hospital admissions and deaths
among vulnerable people with heart problems or
respiratory problems.
5. Paragraph 8 and 10.
We can curb our
consumption of fossil fuels and use technologies
to reduce the emission of heat-trapping gases like
carbon二氧化碳 dioxide, methane, and nitrous oxides, and protect the
forests in the world, and we can also advocate
policies that will combat global warming over the long
term, things like clean cars, environmentally
responsible renewable energy technologies, and stopping the
clear-cutting of valuable forests.
IV.
1. Global warming will probably
be the most serious threat to our Earth, if we do not take into
account of some other possible disasters, such as another world
war, collision of our Earth with some small orbiting planet, or
spread of incurable diseases.
2. In terms of human health,
the people of the poorer countries will suffer most, because their
countries do not have money to protect them when climate
changes.
Structural
analysis
Sub-ideas in the second
part.
1) the causes of
the rising concentration of greenhouse gases in the
atmosphere (Paragraphs 3
and 4)
2) the effect of
such concentration on climate change (Paragraphs 5 and 6)
3) the potential
threat of global warming to human health and
survival (Paragraph
7)
Part one.
Vocabulary
1 Phrase
1. with the exception of:
except, apart from 除……之外，
不包括……在内
2. In essence = essentially,
basically 本质上，根本上
3. wherever possible:
whenever it is possible
只要可能
4. over the long term: over a
long period 从长远看
5. alternative = substitutable,
different, replaceable
II.
1. focus; 2. much the same; 3.
consciousness; 4. threat; 5. deserved; 6. decomposed; 7. revealed;
8. frequent.
III. Word derivation
Fill in the blanks with
the appropriate forms of the given words.
1. Her natural good sense was
improved by the perusal (peruse) of the best
books.
2. Efforts to reach the injured
men have been intensified (intense) because of a sudden
deterioration of weather conditions.
3. I knew he deserved to be
punished but making him stay in every night for a year is a little
excessive (excess).
4. Theories of the origin of
life are partly speculative (speculate), since there is so
little direct evidence available.
5. This is a book that contains
an abundance (abundant) of valuable
information.
6. The cost of the flights,
accommodation and car rental is two thousand dollars
inclusive (include).
7. When an iron object is
heated in a fire, it glows red and emits (emission)
radiation.
8. We hardly ever go into
London. Whatever we need we can buy locally
(local).
1.
peruse v.
熟读，精读
perusal
n. 熟读，精读；仔细研究
e.g.
他每天都要读各种报纸。
He perused the newspapers every
day.
2.
intense a.
强烈的，剧烈的，热烈的
intensify
v. 增强，强化；加剧
intensive n.
强烈的；密集的
intensification n. 增强，加强，强化
e.g.
我的工作非常紧张，以至于我没有时间休息。
My work is so intense that I
even have no time to take a rest.
我的初次失败更坚定了我成功的信念。
My first failure only
intensified my desire to succeed.
我们有十天的强化训练。
We have ten days of intensive
training.
3.
excess a.
过量的，额外的
excessive
a. 过多的，过分的
e.g.
这个胖男孩节制饮食以减轻过量的体重。
The fat boy went on a diet to
get rid of his excess weight.
4.
speculate v.
推测，好奇
speculation n. 沉思，推测；投机
speculative a. 推测的，推理的；投机的
speculator
n. 投机者，投机商人
e.g.
我猜想的全错了。
My speculations proved totally
wrong.
他是一个冷酷的投机者。
He is a ruthless
speculator.
5.
abundant a.
丰富的，充裕的
abundance
n
