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标题: [求助]请教GWD14-33~~~! [打印本页]

作者: 如果随波逐流 时间: 2007-4-30 11:22
标题: [求助]请教GWD14-33~~~!

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.

Answer: D

-------------------------------------------------------------------------------------------不是很懂D怎么选出来的和这题的意思...

大家指教下好吗?谢谢啊~~~~~~

作者: jzq 时间: 2007-4-30 20:23

weeding machine 用differences in shade of color来工作的，D告诉我们这种色差是存在的，所以就支持的了这个计划实施

我是这么理解的不知道是不是正确，望大家指导，谢谢！！

作者: jzq 时间: 2007-4-30 20:40

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=240090&replyID=&skin=1

LZ，这个帖子里东西应该帮的到你

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