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  3. The first paragraph uses several examples to convey the ideas that ______. By saying that the problems of mechanizing some area

The first paragraph uses several examples to convey the ideas that ______. By saying that the problems of mechanizing some area

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问题 The first paragraph uses several examples to convey the ideas that ______.
By saying that the problems of mechanizing some areas are not only cultural in nature, the author means ______.
选项 A、mechanization is not yet introduced in some areas for economic reasons
B、human and animal labour in some areas are less expensive
C、culture is not a factor in obstacling the introduction of mechanization
D、different kinds of mechanized farming tools are used in different cultures
答案A
解析 本题考查对作者意图的揣测能力。意为："某些地区未实现机械化是由于经济方面的原因"。最后一段指出，在某些地区实行机械化从本质上来看并不仅是个文化问题，例如：热带土壤的作物与温带(temperate areas)的明显不同，所以，为温带设计的农具不能用于热带，必须加以改造。但是，实现机械化最大的障碍是：落后国家的农民害怕被机械代替(displaced)，失去谋生手段。后者是经济原因。
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