大学英语四级考试阅读笔记(26)
38. Farmers can save a considerable amount of pesticide by _________.
A) transforming poisoned rain
B) consulting infrared scanning experts
C) resorting to spot-spraying
D) detecting crop problems at an early date
注：考得是二段末句
Even better, Paley's Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infrared scanner measured the heat emitted 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 than they otherwise would.
39. The application of infrared scanning technology to agriculture met with some difficulties due to ______.
A) the lack of official support
B) its high cost
C) its failure to help increase production
D) the lack of financial support
注：考得是三段的第二句，因果关系due to ，B项为错误推理
The bad news is that Paley's company closed down in 1984, after only three years. Farmers resisted the new technology and long-term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works.
40. Infrared scanning technology may be brought back into operation because of－－－.
A) growing concern about the excessive use of pesticides on crops
B) the desire of farmers to improve the quality of their produce
C) the forceful promotion by the Department of Agriculture
D) full support from agriculture experts
注：因果关系词 because of
"This technique can be used on 75 percent of agricultural land in the United States," says George Qerther of Texas A& M. Ray Jackson, who recently retired form 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 backing which he failed to obtain 10 years ago.
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