题目内容
3.Many of us may be eating food containing GM(转基因的) ingredients without realizing it.Are GM foods safe for people?Can they help solve the poverty problem?They have been the subjects of a hot debate.This debate is related to increasing challenges from rising climatic change,population growth,urbanization,and natural resource consumption.According to the Food and Agriculture Organization,food production needs to increase by 60percent by 2050in order to feed 9billion people.Scientists and policymakers are searching for effective ways to gain nutritious food,for today and future.Unlike previous agricultural methods (such as the Green Revolution),GM crops are to fight food safety and poverty challenges.
The great expansion of GM crop varieties over the last two decades can be seen easily.The total area devoted to GM crops has increased 100times from 1.7million hectares in 1996to 170million hectares in 2012.Developing countries now grow more GM crops than developed countries (in terms of area),largely driven by Brazil's rapid adoption of GM crops.China is home to about 4percent of the total global area devoted to GM crops.Beans,corn,and cotton are main global GM crops,while China's focus is on cotton,papaya,and poplar.
Recently,a scientific study shows that GM crops are safe for people and the environment.According to a 2010report on the safety of GM crops by the EU,"the main conclusion to be drawn from the efforts of more than 130research projects,covering a period of more than 25years of research,and involving more than 500research groups,is that biology methods,are not more risky than traditional planting technologies,for example."Other international and national scientific bodies,such as the World Health Organization,have reached the same conclusion.
24.As for GM crops,what do people mainly focus on?C
A.Food production.
B.Food nutrition.
C.Food safety.
D.Food variety.
25.What does Paragraph 3talk about?D
A.More GM crops in developing countries.
B.Less GM crops in developed countries.
C.Rapid adoption of GM crops in Brazil.
D.The expansion of GM crop varieties of the world.
26.From a recent scientific study,we can infer thatB.
A.traditional planting technologies are more risky
B.the safety of GM crops has been proved in many ways
C.the safety of GM crops was reported by the EU in 2010
D.present GM crops are safe for people and the environment
27.What's the writer's attitude towards GM crops?A
A.Supportive.
B.Opposed.
C.Unknown.
D.Indifferent.
分析 为了解决世界粮食问题,科学家研制出了转基因食品,很多人担心这种食品的安全性,事实证明,转基因食品是安全的.
解答 24.C事实细节题.根据第一段Are GM(转基因的 ) foods safe for people?可知人们最多关注的是转基因食品的安全问题,故选C.
25.D事实细节题.根据短文The great expansion of GM crop varieties over the last two decades can be seen easily.可知第三段主要讲的是转基因食品种类的增多,故选D.
26.B推理判断题.根据短文Recently,a scientific study shows that GM crops are safe for people and the environment可知这个调查研究主要是想告诉人们转基因食品对人类和环境都是安全的,故选B.
27.A推理判断题.根据最后一段Recently,a scientific study shows that GM crops are safe for people and the environment.According to a 2010 report on the safety of GM crops by the EU可知作者举这个调查的例子就是想证明转基因食品的安全性,同时表达自己支持转基因食品的态度,故选A.
点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
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