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Even plants can run a fever, especially when they are under attack by insects or disease. But (1)_____ humans, plants can have t
Even plants can run a fever, especially when they are under attack by insects or disease. But (1)_____ humans, plants can have t
admin
2014-06-13
24
问题
Even plants can run a fever, especially when they are under attack by insects or disease. But (1)_____ humans, plants can have their temperature (2)_____ from 3,000 feet away—straight up. A decade ago, (3)_____ the infrared scanning technology developed for military purpose and other satellites, physicist Stephen Paley (4)_____ a quick way to take the temperature of crops to determine (5)_____ ones are under stress. The goal was to let farmer (6)_____ target pesticide spraying (7)_____ rain poison on a whole field, which (8)_____ include plants that don’t have the pest problem.
Even better, Paley’s Remote Scanning Services Company could detect crop problem before they became (9)_____ to the eye. Mounted on a plane flown at 3,000 fee (10)_____, an infrared scanner measured the heat emitted by crops. The data were (11)_____ into a color-coded map showing (12)_____ plants were running "fevers". Farmers could then spot spray, using 50 to 70 percent less pesticide than they (13)_____ would.
The bad news is that Paley’s company closed down in 1984, after only three years. Farmers (14)_____ the new technology and long-term backers were hard (15)_____. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to (16)_____ into operation. Agriculture experts have no doubt about the technology works. "This technique can be used (17)_____ 75 percent of agricultural land in the United States", says George Oerther of Texas A&M. Ray Jackson, who recently retired from the Department of Agriculture, thinks (18)_____ infrared crop scanning could be adopted by the end of the decade. But (19)_____ Paley finds the financial backing (20)_____ he failed to obtain 10 years ago.
选项
A、where
B、which
C、how
D、when
答案
B
解析
此题属于语法题,此处需一个关系代词引导定语从句,其先行词是financial backing,故选项which引导定语从句,符合句意。全句可译为:但这只有当佩利找到他十年前没有找到的经济上的支持时,他才能实现他的想法。
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0
考研英语一
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