求问大牛 OG13 CR74 我逻辑链很不清晰啊！！

tiancaijudy

求问大牛 OG13 CR74 我逻辑链很不清晰啊！！

tiancaijudy

求解释～～～～

dorothyyy

同学 早就木有书啦 把题目贴上来呗...

tiancaijudy

Which of the following most logically completes the argument below?
Using broad-spectrum weed killers on weeds that are competing with crops for sunlight, water, and nutrients presents a difficulty: how to keep the crop from being killed along with the weeds. For at least some food crops, specially treated seed that produces plants resistant to weed killers is under development. This resistance wears off as the plants mature. Therefore, the special seed treatment will be especially useful for plants that________.
(A) produce their crop over an extended period of time, as summer squash does
(B) produce large seeds that are easy to treat individually, as corn and beans do
(C) provide, as they approach maturity, shade dense enough to keep weeds from growing
(D) are typically grown in large tracts devoted to a single crop
(E) are cultivated specifically for the seed they produce rather than for their leaves or roots

lycorisss

同问呀~想问下选项E
OG上的解释是：A plant harvested for roots,fruits ,ot leaves ,rather than for seeds ,would derive no less an advantage from resistance to weed killers in earlier stages of growth .
能不能解释下红色的部分呀？

ryon

我是这么做题的
A里面的summer squash和E里面的leaves or roots太突兀了，提干都没出现过，没办法用来做比较以支持原文，不选
B首先我觉得easy to treat individually中的individually很奇怪，其次as ... and beans do中的beans也很突兀，不选
D为什么要提single crop?
至于C，原文提到the resistance会随着plant mature而减弱，所以C里面的as they approach maturity，shade dense enough to keep weeds from growing是对的

杀G给猴看

同问OG的E选项解释：derive no less an advantage...什么意思TT

我做题时的排除方法是觉得 要cultivate植物的哪一部分无所谓，只管这种方法是否有效。

The explaination OG offers makes me confused...TT

yangrryq

A plant harvested for roots,fruits ,ot leaves ,rather than for seeds ,would derive no less an advantage from resistance to weed killers in earlier stages of growth .是说一种植物收获，为了根，果实，叶子而不是种子，在它们的早期生长中将依然从抵制weed killers会获得优势，这时候是说这个选项不合逻辑。不只是对plants that are cultivated specifically for the seed they produce rather than for their leaves or roots有用。

apaso

看了以上nn的回答，还是搞不懂啊，逻辑题实在做不出感觉。
题目说，杀杂草剂比较难用，因为它会把庄稼也给杀了。杂草之所以不好，是因为它会和庄稼抢养分，水和阳光。
现在有种专门处理过的庄稼种子，可以对杀草剂产生抗体，在庄稼生长的时候。一旦庄稼成熟了，这个抗体也消失了。
所以，这种专门处理种子法对哪个庄稼最特别有效。

也就是说，农民在庄稼成熟前，一直会喷杀草剂，防止杂草长出来，抢营养。
我看了答案知道是C，然后说因为C成熟后，他长得茂密有遮阴的功能----没了阳光杂草想长也长不大。农民这时候就不喷杂草剂了？
我的问题是，想等这些庄稼长大后，农民还每天喷杀杂草剂吗？他们只要喷，这些杂草不是还不会长大的嘛。只要喷，他abcde农作物效果都是一样的；如果不喷，那abde田里的杂草肯定长得比c要快点，c里的庄稼会好点。

MILKLUVNYC

yangrryq 发表于 2013-3-27 10:51
A plant harvested for roots,fruits ,ot leaves ,rather than for seeds ,would derive no less an advant ...

我想问一下 C选项应该怎么翻译啊 我选她是因为我觉得题中是讲 广谱除草剂对成长中的crop的影响 只有C提到成长阶段了 所以我选她了 但是我不知道C应该怎么翻译。。。求解答~谢谢啦！