急求： GWD31 02-Q27

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

1. consider that there might be minor, quick-growing crops that do
        mature in 45 days or less
2. identify any alternative
        method of weed control that could be used instead of the method it rejects
3. distinguish among the various
        kinds of synthetic herbicides
4. allow for the possibility of
        combining the two weed-control methods it mentions
5. allow for the possibility
        that plants other than rye, handled the same way, might have the same
        effect

  
Answer:

答案本来就是D啊

要还是不放心，可以搜索一下老帖子，前两天还刚有人讨论过。