求教 GWD - 31 - Q17 纠结之~~~~~~~~~

teddybearj4

It is crucially important to farmers that the herbicides they use to control weeds not damage their crops. One very effective herbicide is safe for corn, but soybeans are damaged even by the herbicide’s residue, which remains in the soil more than a year after the herbicide is applied. Soybeans and corn are not sown together in the same filed; nevertheless, most farmers are reluctant to use the herbicide on their corn.

Which of the following, if true, provides the strongest justification for the farmers’ reluctance?

A. The residue of the herbicide in the soil a year after application is not enough to control most weeds effectively.
B. To maintain the nutrients in the soil, corn and soybeans are often planted in a field in alternate years.
C. The demand for soybeans is growing faster than is the demand for corn.
D. For maximum yield, soybean plants are grown closer together to each other than are corn plants.
E. The application of herbicides is less critical for soybean than for corn crops.


OA: B

我不太理解这题目吧是叫我们找到support farmers'  reluctance的选项吗？正确答案B应该怎么理解哇？C为什么不对呢？
谢谢诶！

teddybearj4

明白啦！谢谢LS两位！！！

子阳

楼上说的基本是对的 To maintain the nutrients in the soil  ，corn 和soybean是在不同年间轮种的 但是herbicide 在土壤中存留会超过一年 所以产生不利影响

maestri

前提：杀虫剂对玉米有用，危害soybean
问：为什么尽管corn和soybean没有同时种在一块地上，农民也不愿意在玉米上用杀虫剂
答案：尽管没有同时种在一块地上，但是交替重在一块地上

C:和该产品需求无关哦，另外想想：如果soybean的需求更高，为什么不种soybean呢