大家看看这道GWD题是不是很绕

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. 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.

此题其实我觉得A和B都有道理，看你怎么理解了，答案给出的是B,大家来分析一下吧．

题意应该是：通过发明这种设备，可以利用设备的optical sensors and microprocessors 将草与其他植物（crop plants）区分开来，区分依据shade of color。通过机器自动除草的同时不会伤到其他植物，从而降低人工，提高效率。满足这样的结论，需要这样的假设：植物的颜色与草的颜色有明显的区分度。

A选项指出不同的草有不同的颜色，但这里没有提到植物。如果说植物的颜色跟草的颜色一样，那同样会被除掉，这样的结果显然无法使得计划实施。

B选项指出，通过基因配置，在不改变任何植物（plants of virtually any species）其他特性的情况下，使得植物可以有明显的 distinctive shade of color ，这样便和草区分开来。一旦有区分度，机器就可以自动工作，从而降低人工。