例1:The highlighted sentence: He refused to develop projection technology, reasoning that if he made and sold projectors, then exhibitors would purchase only one machinea projectorfrom him instead of several.
Which of the sentences below best expresses the essential information in the highlighted sentence from the passage? Incorrect choices change the meaning in important ways or leave out essential information.
A. Edison was more interested in developing a variety of machines than in developing a technology based on only one.
B. Edison refused to work on projection technology because he did not think exhibitors would replace their projectors with newer machines.
C. Edison did not want to develop projection technology because it limited the number of machines he could sell.
D. Edison would not develop projection technology unless exhibitors agree to purchase more than one projector from him.
解析:由原句中的reasoning和if可知,本句包含两种逻辑关系因果关系和条件关系。但是由于if引导的条件从句是附属于reasoning引出的表示原因的从句中,因而本题原句的主逻辑关系是因果关系。所以,考生应首先考虑选择包含因果关系的选项B与C。由于单靠逻辑关系还判断不出正确选项,考生需进一步对比选项主句与原句主句,看两者的意思是否一致。原句中He refused to develop projection technology的谓语动词是refused;选项B主句的谓语动词也是refused;选项 C主句的谓语动词是did not want to,与原句的refused属于同义词范畴。也就是说,选项B与C的主句意思与原句的主句意思一致,因而考生还是不能找出答案。这时,考生便需要再进一步对比选项从句与原句从句的意思是否一致。从原句中的 would purchase only one machine instead of several可知,原句主要讨论的是数量问题,对比选项B与选项C,只有选项C中的the number与数量有关,因而正确答案是选项C。
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