求助OG VERBAL-51

ran2010zx

X51. Acompany plans to develop a prototype weeding machine that usescutting blades with optical sensors and microprocessors that distinguish weedsfrom crop plants by differences in shade of color. The inventor of the machine claimsthat it will reduce labor costs by virtually eliminating the need formanual weeding.[c1]
Whichof the following is a consideration in favor of the company's implementing itsplan to develop the prototype?

(A)[c2] There is a considerabledegree of variation in shade of color between weeds of different species.
(8)The shade ofcolor[c3] of some plants tends to changeappreciably over the course of their
growingseason.
(C)[c4] When crops are weededmanually, overall size and leaf shape are taken into account in distinguishingcrop plants from weeds.
(Dl [c5] Selection and geneticmanipulation allow plants of virtually any species to be economically bred tohave a distinctive shade of color without altering their other characteristics. D
(El[c6] Farm laborers who areresponsible for the manual weeding of crops carry out other agricultural dutiesat times in the growing season when extensive weeding is not necessary.
看了讨论忒，说是A没有提到PLANT
不过A带进去，原文的确能得到加强
并且我觉得D可以说是A的翻版
仍然在说提高颜色光泽什么的
求高人解释！谢谢

ran2010zx

自己顶，求指导

ran2010zx

继续顶，求指导

ran2010zx

这个……好心人回答下呗

sdcar2010

A only talks about weeds. If you can recognize different weeds, great.  But it won't help you separate the weeds from the plants.

D on the other hand, makes sure one can separate the weeds from the plants.

ran2010zx

刚看了你的回复觉得应该是A只是说颜色很多。但并没有distinctive。D保证了可以distinctive

Kb24

楼主理会错2010的意思了。

2010的意思是说这个技术的关键目的是这个割草机可以分辨WEED和crop plants. 就是说可以分辨杂草和有用的作物，自动割掉杂草，保留农作物。这样就不需要人工去手动除杂草了。而A的意思是说各种杂草的之间有不同的shade of color，可以被区别出来。这个显然是没用的，因为目的是要区分农作物和杂草，而不是为了区分杂草A和杂草B。

D是有用的

ran2010zx

那d不是也没有提到如何区分杂草么？

Kb24

D说可以有控制基因的办法让几乎所有的PLANT拥有一种独特的COLOR - 这样一来就可以区分杂草和plants了。有这种DISTINCTIVE COLOR的就是有用的PLANT, 其他都自动割掉。。。。