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标题: GWD题不明白感觉答案CQ相驳求教！！ [打印本页]

作者: H.Qi 时间: 2016-9-8 08:13
标题: GWD题不明白感觉答案CQ相驳求教！！

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?

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

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

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

• D 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.

• E 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.

这道题是那种类型呢？答案D

如果是方案的话

通过eliminate the need for manual weeding来达到降低labor cost

A: 方案可行性

D: 方案可行性

我好困惑啊。。。刚上手太弱了。。。helr大神能不能召唤一下下，或者有没有什么微信群大家相互扶持啊。。。

作者: VincentFSJ 时间: 2016-9-8 08:50
A方案怎么可行了呀？
a：杂草颜色可以分辨，但是前提说的是 that distinguish weeds from crop plants by differences in shade of color.
那分辨了杂草颜色有什么用呢？
就好比：抄了作业就会可以上哈佛
a：可以抄的作业有物理化学生物地理等等等。
没有解释问题吧

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