题目内容
17.A.A careful analysis biologicallyB.What's globle warming?
C.Solution to the terrifying result
D.Greater danger of extinction
E.Many shocking things found F.A shocking report
76.B
The earth is getting warmer.People burn coal,oil and gas and this produces carbon dioxide,methane and nitrous oxide.These gases,called"greenhouse gases",prevent the heat of the sun from leaving the earth's upper atmosphere and this makes the earth warmer.
77.F
A few weeks ago a group of scientists produced a report about global warming and the natural world.They wanted to find out if global warming was dangerous for plants and animals.According to what they found,the scientists say that during the next 50years about 25% of land animals and plants will become extinct.More than a million plant and animal species will be extinct by 2050.
78.C
More than 10% of all plants and animals will become extinct.It is too late to save many plants and animals because of the greenhouse gases that are already in the atmosphere.But the scientists say if we control greenhouse gases now,we could save many more plants and animals from extinction.
79.A
The scientists studied some regions of the world with a very rich biology.These regions were Europe,Australia,Central and South America,and South Africa.Their studies showed that species living in mountainous areas had a better chance of survival because they could move uphill,to get cooler.In flat areas,such as deserts,plants and animals would have to move a very long distance to get cooler,so they are in greater danger of extinction.
80.E
The scientists found that half of the 24 species of butterflies they studied in Australia would soon become extinct.60% of the species in the Kruger National Park in South Africa would also die out,and more than 100% of the 300 South Africa plant species they studied would also become extinct.One of the plants in danger of extinction is the national flower of South Africa,the King Protea.They studied 163 tree species in the Cerrado region of Brazil and found that 70 would become extinct.Many of the plants and trees that live in this region live nowhere else in the world.In Mexico,they studied 1,870 species and found that more than 30% of these were in danger of extinction.
分析 本文主要写了全球变暖的原因,变暖给整个地球的物种造成的巨大危害,人类应该控制温室气体来挽救地球物种.
解答 76.B 主旨大意题.根据句子These gases,called"greenhouse gases",prevent the heat of the sun from leaving the earth's upper atmosphere and this makes the earth warmer.
这些被称为"温室气体"的气体,阻止太阳的热量离开地球的上层大气,使地球变暖.可见这是对全球气温变暖进行的解释.所以B选项什么是全球变暖符合段意.
77.F 主旨大意题.从这段的内容和第一句话A few weeks ago a group of scientists produced a report about global warming and the natural world.More than a million plant and animal species will be extinct by 2050. 报告的结果是超过一百万种动植物将在2050之前灭绝.可知是关于一个令人吃惊的报告.所以选F.
78.C 主旨大意题.根据句子 But the scientists say if we control greenhouse gases now,we could save many more plants and animals from extinction.如果控制的温室气体就能挽救更多的动植物,可知这段是对可怕结果的解决办法.选C
79.A 主旨大意题.从这段的第一句话:The scientists studied some regions of the world with a very rich biology.可知是从生物角度的仔细分析.选A
80.E 信息提取题.这段里面出现了很多数据,例如The scientists found that half of the 24 species of butterflies they studied in Australia would soon become extinct科学家们发现,在澳大利亚研究的24种蝴蝶中,有一半很快就会灭绝.以下列举的数据的发现都是让人震惊的事情.选E很多令人震惊的发现符合段意.
点评 本文主题是全球气温变暖的情况和一些惊人的事实,主要是找出适当的段落主题,要学生有很强的归纳能力.