The author gave his uncles example to______.A．show the fact that education in poor areas i
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The author gave his uncles example to______.
A．show the fact that education in poor areas is unexpectedly difficult
B．demonstrate that teacher is not the only factor affecting students" performances
C．prove that he has deep understanding in the education matter
D．illustrate that teachers should be located where they could best perform
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
推理题。根据题干关键词hisuncle"sexample定位到第一至四段。由此可知，作者的叔叔在芝加哥一所公立学校任教时，班级里的学生家庭出身不好，对学习无人问津，故叔叔虽竭尽所能，教学效果仍不显著；后来调职到另一所学校任教，教的是中产阶级家庭的孩子，这些学生及其家长对教育的重视使叔叔的教育成效显著。由此可知，作者欲以此例证明学生成绩不好，老师不是唯一的原因，故[B]正确，这一点在第五段全段得到具体阐释，也是全文论述的主要观点。依照这四段的逻辑关系，[A]、[C]和[D]的内容并非这几段所要强调的重点，故均可排除。