gwd-1-33

remona9t

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?

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

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

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

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.

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 necessarry.

answer: D

我觉得A也是说明方案的可行性。为什么不对呢？求助xdjm

bigmouse

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=67992

去这里看看～～～

MM在提问前，可以先到置顶的讨论汇总的帖子看看有没有其他人讨论过你的问题。

哪里的回答更详细，更准确～～～

shouyang12

我感觉D比A好

D说这种颜色是可以区分的而A没说

roberto0220

文中要区别是的weed和crop的颜色，a只说了weed species的颜色区别，不起作用。所以a不对。

ps：我发现参与讨论对我开发思路很有好处。只是有点花时间。

kongkong57

TONGWEN