一道逻辑题 。gwd 2 没有讨论过

pengfei1102

Q27:

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 45 days.  No major agricultural crop matures from seed in as little as 45 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 45 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

这题 好像没搞懂关系。 为什么 选d，不选 E

hawkinsxie

文中，仅仅因为rye时效短，就认为它毫无用处。显然漏洞在于忽视了多多少少还有用处的可能性。

E说rye以外的东西，没有针对漏洞。

pengfei1102

那为什么选 d

kallyli

play no part in effective weed control
最后一句正好是D的取非
没有任何作用取非是at least有些作用，也就是有部分作用，那就是与另一种方式结合可以产生作用D

pengfei1102

谢谢明白了。

pengfei1102

谢谢明白了。

fiaoyaya

恩~~应该选D,E说other crops,无关.