6 Hansen cautioned.although the role of soot in altering global climate is substantial,it does not alter the fact that greenhouse gases are the primary cause of climate warming during the past century.Such gases are expected to be the largest climate forcing f10r也e rest of this century.
7 The researchers found that observed warming in the Northern Hemisphere was 1arge in the winter and spring at middle and high latitudes.These observations were consistent with the researchers’ climate model simulations,which showed some of the largest warming effects occurred when there were heavy snow cover and sufficient sunlight.
词汇 :
soot n.煤烟,煤灰
emission n.释放,散发,排放
simulation v.模拟
latitude n.纬度
glacier n.冰川,冰河
albedo n.反照率
permafrost n.永冻层
forcing n.温室作用
dioxide n.二氧化物
magnitude n.量,大小
练习:
1.Paragraph 3____________
2.Paragraph 4____________
3.Paragraph 6____________
4.Paragraph 7____________
A Soot’s Role in Changes in the Climate and the Atmosphere
B Observations of Warming in the Northern Hemisphere
C Explanation of Increased Warming Effect Caused by Soot
D Effort to Reduce Snow Albedo
E Ways to Reduce Soot Emission
F Greenhouse Gases as the Main Factor of G10bal Warming
5.In the twentieth century,soot____________
6.Hansen cautioned that greenhouse gases____________
7. Black soot covered snow and ice____________
8.A soot forcing is unusually effective,which____________
A produces much more global warming than a carbon?dioxide forcing of the same magnitude
B contributed to 25 percent of observed global warming
C can produce greenhouse gases
D absorb more of sun’s energy and warmth than white background
E still surpass soot in warming the world’s climate during the last century
F can be seen mostly in the Northern Hemisphere
第四部分:阅读理解(每题3分,共45分)
下面有3篇短文,每篇短文后有5道题,每道题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题,从4个选项中选择1个最佳答案涂在答题卡相应的位置上。
第1篇
Goal of American Education
Education is all enormous and expensive part of American life. Its size is matched by its variety.
Differences in American schools compared with those found in the majority of other
countries lie in the fact that education here has long been intended for everyone—not just