According to a prediction of the not-so-distant future published in 1940, electricity would revolutionize agriculture. Electrodes would be inserted into the soil, and the current between them would kill bugs and weeds and make crop plants stronger.

Which of the following, if true, most strongly indicates that the logic of the prediction above is flawed?

 A

In order for farmers to avoid electric shock while working in the fields, the current could be turned off at such times without diminishing the intended effects.

 B

If the proposed plan for using electricity were put into practice, farmers would save on chemicals now being added to the soil.

 C

It cannot be taken for granted that the use of electricity is always beneficial.

 D

Since weeds are plants, electricity would affect weeds in the same way as it would affect crop plants.

 E

Because a planting machine would need to avoid coming into contact with the electrodes, new parts for planting machines would need to be designed.

申友解析

题干：根据四十年代的预测，电力会给农业带来一场革命。埋在土壤里的电极可以用它们之间的电流杀死害虫和杂草。

题目：下面哪一个选项为真的话会在最大程度上证明题干逻辑是有漏洞的。

分析：引入他因型负向逻辑，需要找出在地里通电对农业生产的负面效应。选项A说为避免农民触电，当他们在地里作业时要断电。这个选项只是常规操作，并不涉及负面效应。B选项说的是地里通电的积极效果，逻辑方向同我们要找的答案相反。C选项扩大了逻辑范畴，说用电不一定总是有益的，但没有具体到我们地里通电对农业生产这个论点上。D选项说杂草跟作物一样也是植物，所以假如电流能杀死杂草的话一样也会杀死作物。这是最为具体最为有利的一个负向他因，是我们要找的答案。E选项讨论农业机器，跟论点无关。