百思不得其解，这个题是那种类型啊？如何下手？请NN分析下吧？

xiao_s000

52.    Rye 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 only about forty-fi ve days. No major agricultural crop matures from
      seed in as little as forty-fi ve 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-fi ve 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

feir2004

我昨天做GWD22，也遇到这题，也错了。望有人指点！

heypony

我觉得这种题是结合了weaken和填空题（logically completes the argument）

结论说plowing rye into the soil这种method对weed control没有用

问题要求找出这个结论的错误(weaken结论)。只不过这里问题中已经帮你填了答案的一部分："it fails to..."。也就是说问这个结论错了，因为它没有考虑到什么。

A选项提到一个新的概念minor,quick-growing crops，无关
B选项说any alternative methods，讨论的不是题干说的methods，所以也是无关选项
C选项说区别多种不同的除草剂。只涉及了一个方面，与结论提到的method无关。
D选项说可以把两个可能的methods结合起来用。这也就回答了上面的问题：结论错了，因为它没有考虑到可以把两种methods一起用。正解。
E选项说that plants other than rye，结论说的是rye，这里说的是其他的plants，无关选项。

OTSUKAAINAI

答案是D么？我没做过这道题，但是以前做过道类似的。

结论：前边说的那种方法完全没用

问题让找反驳结论的，D是最明显的, 我深刻的觉得我楼上的是老管的弟子，不知猜对没？