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 necessary.
A显然是一种不利的情况，因为文中说除草机是基于区别野草和庄稼的shade of colors而工作的，而A说：不同种类野草的shade of colors相当不一样，这样自然就对除草机基于shade of colors辨别野草增加了困难。——反之，考虑一种极端情况，如果所有野草都是同一种shade of colors，那么除草机就很容易辨别野草和庄稼了。
D说：通过选种和基因控制，能够让各种庄稼在不改变其他特性的情况下都有一种独特的shade of color，这样自然有利于除草机根据shade of colors的辨别来除草了。
A显然是一种不利的情况，因为文中说除草机是基于区别野草和庄稼的shade of colors而工作的，而A说：不同种类野草的shade of colors相当不一样，这样自然就对除草机基于shade of colors辨别野草增加了困难。——反之，考虑一种极端情况，如果所有野草都是同一种shade of colors，那么除草机就很容易辨别野草和庄稼了。
D说：通过选种和基因控制，能够让各种庄稼在不改变其他特性的情况下都有一种独特的shade of color，这样自然有利于除草机根据shade of colors的辨别来除草了。
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发表于 2004-7-12 23:39:00
