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  3. What is the main idea of paragraph 1? What is the author’s opinion about the so-called Green Revolution?

What is the main idea of paragraph 1? What is the author’s opinion about the so-called Green Revolution?

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问题 What is the main idea of paragraph 1?
What is the author’s opinion about the so-called Green Revolution?
选项 A、It makes it possible to grow more crops.
B、It is useful but sometimes causes problems.
C、It can solve the food shortage problem.
D、It costs a lot but worth the effort.
答案B
解析 由题干中的Revolution可以定位到原文第四段开头部分。[精析] 题干问的是作者对所谓的“绿色革命”的看法。在原文第四段讲到施行绿色革命的地区有an initial rise in production，但增长却很快被高投资抵消“soon offset by the increasing costs”，同时还给当地人民带来很大的经济负担，故B)It is useful but sometimes causes problems含义与之相符，为正确答案。[排除干扰] 文中指出“绿色革命”有利也有弊，并未提及A)“可能种植更多的作物”、C)“能解决粮食紧缺问题”、D)“回报多但投入也大”三项具体结果，故排除。
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大学英语四级

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