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 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?

试试吧

首先我觉得这道题目本质上是一道加强题。前提是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. 结论是The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

解题有两条思路：其一，桥梁型，在difference in shade of color,与 eliminating the need for manual weeding之间架桥。其二，事实型，认为结论为真

这里，D选项，从可行性出发在在difference in shade of color,与 eliminating the need for manual weeding之间架桥。但是，E选项，则指出了，这个计划的好处，是以题目的结论为前提的，不能作为这题的加强选项。