B正确的前提是other crops指modified seeds,否则大家都同意B是无关项。我反复读了题目,仍然认为改良后的棉花就成了另外一种农作物实在太牵强,所以仍然坚定E.
我同意上述观点,other crops应该指的就是其他种类的作物,怎么能把普通棉算一类,改造后的就算作另一类crops了呢!
但我仍坚持选B,原因如下:
B. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops (我想这里比较棉花杀虫剂和其他作物杀虫剂是为了说明那个slightly lower的意义,如果以前棉花杀虫剂价格非常高,那即使slightly也会大大降低总成本,否则,引进新的就没什么意义了。而不是解释说other crops包不包括新棉的问题,肯定不包括!我建议对这个选项的作用的理解要换个角度了)
C. Whether for most farmers who grow cotton it is their primary crop
D. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did (种粮多少与经济利益对比没有关系)
E. Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide. (条件1明确指出新旧棉花的杀虫剂使用量差异不大,对这个问题回答是或否都不会再有任何影响了)
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