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Even plant can run a fever, especially when they’re under attack by 阅读理解答案.           ★★★
Even plant can run a fever, especially when they’re under attack by 阅读理解答案.
作者:佚名 文章来源:网络 点击数: 更新时间:2018/11/21 11:17:59

Even plant can run a fever, especially when they’re under attack by insects or disease. But unlike human, plants can have their temperature taken from 3,000 feet away straight up. A decade ago, adopting the infrared(红外线) scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely(精确的) target pesticide(杀虫剂) spraying rather than rain poison on a whole field, which always includes plants that don’t have pest problems.
    Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Fixed on a plane flown at 3,000 feet at night, an infrared scanner measured the heat sent out by crops. The data were transformed into a color-coded map showing where plants were running “fevers”. Farmers could then spot-spray, using 50 to 70 percent less pesticide that they otherwise would.
    The bad news is that Paley’s company closed down in 1984, after only three years. Farmers resisted the new technology and long-term supporters were hard to find. But with the renewed concern about pesticides on produce and refinements(改进) in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt that the technology works. “This technique can be used on 75 percent of agricultural land in the United States,” says George Oerther of Texas A& M, who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only if Paley finds the financial support which he failed to obtain 10 years ago.
32. Plants will give out an increased amount of heat when they are _____.
A. facing an infrared scanner 
B. sprayed with pesticides 
C. exposed to extreme sun rays  
D. in poor physical condition
33. In order to apply pesticide spraying precisely, we can use infrared scanning to _____.
A. draw a color-coded map 
B. evaluate the damage to the crops 
C. locate the problem area  
D. measure the size of the affected area
34. The application of infrared scanning technology to agriculture met with some
difficulties of _____.
A. the lack of official support  
B. its high cost
C. the lack of financial support 
D. its failure to help increase production
35. Infrared scanning technology may be brought back into operation because of _____.   
A. full support from agricultural experts
B. the forceful promotion by the Department of Agriculture  
C. the desire of farmers to improve the quality of their produce   
D. growing concern about the over use of pesticides on crops
32. D. 推理判断题。关键句:Even plant can run a fever, especially when they’re under attack by insects or disease.                   
33. C. 推理判断题。关键句:The goal was to let farmers precisely(精确的) target pesticide(杀虫剂) spraying rather than rain poison on a whole field, which always includes plants that don’t have pest problems.
34. C. 细节理解题。关键句:Farmers resisted the new technology and long-term supporters were hard to find. 及But only if Paley finds the financial support which he failed to obtain 10 years ago.
35. D. 细节理解题。关键句: But with the renewed concern about pesticides on produce and refinements(改进) in infrared scanning, Paley hopes to get back into operation.
 


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