题目内容
12.There is a serious problem to our earth.That's global warming.No doubt the tons of carbon dioxide being thrown up into the air are dangerously warming the earth.It is clear that average temperature has risen during the last century.Not everyone can believe that carbon dioxide is responsible.A new study shows us it is not all the fault of carbon dioxide.Some scientists studied the sun and found that when the sun becomes more active,the earth warms up.When the sun quiets,as it did in the 1950s and 1960s,temperature takes a dip (下降).So some scientists said the sun's changeable moods may be more important than carbon dioxide in warming the earth.You might think that"global warming"means nothing more than a rise in the world's temperature.But rising sea levels caused by it have affected our environment and living standard in many ways.
We can't change the sun's moods.So in order not to make the earth warming up,what we can do is to control the amount of giving off carbon dioxide.Studies have shown that humanrelated emissions (排放物) of carbon into the atmosphere is causing,and will in the future cause seriously global warming.Many countries have already made some laws to stop sending carbon dioxide into the air directly.As an ordinary person,we use fewer cars when we go out.We can ride a bike or walk.It is not only good for environment,but also good for our health.
Are you ready?It is the time that we do something for the global warming.Let us go for it.
21.What makes the earth become warmer and warmer?D
A.Carbon dioxide
B.The sun
C.The air
D.A and B
22.The scientists also said that the sun's changeable moods may beCthan carbon dioxide in warming the earth.
A.more serious
B.more difficult
C.more important
D.more terrible
23.What should we do in order not to make the global warming?A
A.We should control sending carbon dioxide into the air directly.
B.We should try to change the sun's changeable moods.
C.We should make some laws to prevent people from driving.
D.We should make the sun become more active.
分析 人们都知道引起温室气体的因素是二氧化碳,可是科学家发现太阳的活跃也会加重温室效应,这种影响比二氧化碳甚至更明显.
解答 21.D.细节理解题.根据第一段No doubt the tons of carbon dioxide being thrown up into the air are dangerously warming the earth和第二段Some scientists studied the sun and found that when the sun becomes more active,the earth warms up可知,二氧化碳增多和太阳变得更加活跃使地球变得越来越暖.故选D.
22.C.细节理解题.根据第二段中"the sun's changeable moods may be more important than carbon dioxide in warming the earth"可知,太阳的变化会比二氧化碳更严重,故选C.
23.A.细节理解题.根据第三段So in order not to make the earth warming up,what we can do is to control the amount of giving off carbon dioxide可知,为了不使地球变暖,我们能做的就是控制二氧化碳的排放量.故选A.
点评 本篇文章都是细节推理题,答题的已给选项也一般不会和短文相关词语完全相同,需要考生自己理解句子,延伸推理出题目答案,比一般细节理解题偏难.
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