红皮OG CR P501/52Rye sown in the fall and plowed into the soil in early spring leaves a residue that is highly effective at controlling broad-leaved weeds,but unfortunately for about forty-five days.No major agricultural corp matures form seed in as little as forty-five days.Synthetic herbicides,on the other hand,although not any longer-lasting,can be reapplied as the crop grows.Clearly,therefore,for major agricultural crops,plowing rye into the soil can play no part in effective weed control. The argument is most vulnerable to the objection that it fails to (A)consider that there might be minor,quick-growing crops that do mature in forty-five days or less (B)identify any alternative method of weed control that could be used instead of the method it rejects (C)distinguish among the various kinds of synthetic herbicides (D)allow for the possibility of combining the two weed-control methods it mentions (E)allow for the possibility that plants other than rye,handled the same way,might have the same effect 求解A选项~~ 3Q啦啦 -- by 会员 roxyblack (2012/9/12 20:10:43)
a选项是绝对错误的~文章结论是：
Clearly,therefore,for major agricultural crops,plowing rye into the soil can play no part in effective weed control.
而a选项是针对minor,quick-growing crops ，这样的答案是毫无意义的，有点答非所问，因为它根本就忽略了结论的前提。你所要削弱的是针对主要农作物而言的结论。不知道解释清楚了没有？ | 
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发表于 2012-9-12 20:10:43
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