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88.【新农药】 by breezeheart (710)
有种新农药可以杀死吃corn的虫虫,但会残留在土壤中,对另外一种作物(不记得名字)有危害。有人就说没关系,一般corn和另一种作物不会同时种在一起的
问weaken还是evaluate吧
选的答案是为了让土壤保持肥性,corn和另外一种作物会被轮流种在同一块农田里。
GWD TN-21-14 (感谢liuqiangde 为大家找到原题~)
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.
The application of herbicides is less critical for soybean than for corn crops.
选B |
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