gwd-1-33

Q33:

A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color.  The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype?

1. There is a considerable degree of variation in shade of color between weeds of different species.


2. The shade of color of some plants tends to change appreciably over the course of their growing season.


3. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.


4. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.


5. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.

Here, why E is wrong? I think probably farm labors who carry out other duties because of new machine will indeed reduce the labor costs.

Dizzy now, could any NN help me?

Thank you, Les!

But there seems no the reply I need...

usdream，不太明白你的问题。

原文是说公司想发展一种割草机，这种割草机是通过感光器和微处理器区别杂草和庄家的。同时发明者说这将大大减少劳动成本，因为它根本不再需要人工除草了。

问题问下面哪一条支持了公司发展这种机器。

D选项实际上是说了一个条件使得这种割草器具有实用价值。

E is out of scope.

The conclusion of the premises is about "weeding machine", and the subject of choice E is "farm labors".

我认为选E

题干问的是a consideration in favor of 。。。是说以下哪个选项也反映了一种赞同支持该计划的考虑。E选项认为除了题目中的降低劳动成本之外，还可以把人力时间花在别的事情上，所以支持。

D选项是说有某种技术可以使颜色差别看起来比较大从而技术可行。但我认为文中根本没有说颜色差别大小是很严重的问题，同时题目没有让大家质疑或是补充条件，而是假设文章讲的都是对的，所以我们无需考虑颜色差别大不大这个问题严重不严重之类的。该选项作为无关项排除。

我认为选E.

这题是﹙D﹚还是﹙E﹚，有NN或版主可以给定论吗?