OG16- CR71求大神帮忙梳理一下

hhua77 · 发表于 2016-9-24 21:46:44

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

正确答案是C

楼主半天没理解题目的意思，然后发现一个是seed一个是weed = =
但是理解题目之后对正确答案又不理解了，哪位大神能帮忙分析一下啊啊啊啊啊
（任爸）感恩感恩！！！

Fiona09 · 发表于 2016-9-26 14:39:35

下列哪一个选项最能有逻辑地完成下面的论证?

使用宽范围除草剂除去与庄稼争抢阳光，水分和营养的杂草面临一个困难：如何保留庄稼随着杂草的被杀死。对于至少一些粮食作物而言，特殊培育的能抵抗除草剂的种子正处于发展之中。这种抵抗会消失随着植物生长成熟。因此，这种特殊的种子培育将会特别有用对于那些植物，这些植物____________。

A. 产生收成在一个广大的时间期间，就像summer squash
B. 产生大种子能够容易地个别对待，就像玉米和豆子
C. 提供，随着它们接近成熟，遮蔽足够的阴凉来抑制杂草生长
D. 被通常种植在大片一种单一作物的土地上
E. 被特别地为了种子而种植而不是为了它们的叶子或者根茎

A、B、D、E项中，作物仍都随着其生长成熟，抵抗杀虫剂的能力会变弱消失。只有C选项说作物随着其自身生长成熟，可以抑制杂草生长，这也使得种子特殊培育有意义。

OG16- CR71求大神帮忙梳理一下

所属分类: GMAT考试

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