单选题
Even plants can run a fever, especially when they are under attack by insects or disease. But 30 humans, plants can have their temperature taken from 3,000 feet away—straight up. A decade ago, 31 the infrared (红外线的) scanning technology developed for military purpose and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine 32 ones are under stress. The goal was to let farmer precisely target pesticide spraying 33 rain poison on a whole field, which invariably include plants that don't have the pest problem. Even better, Paley's Remote Scanning Services Company could detect crop problem before they became 34 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 35 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 36 would. The bad news is that Paley's company closed down in 1984, after only three years. Farmers 37 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. 'This technique can be used 38 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 remote infrared crop scanning could be adopted by the end of the decade. But only if Paley finds the financial backing 39 he failed to obtain 80 years ago. A. unlike I. extremely B. adopting J. rather than C. deliberately K. which D. transformed L. how E. invariably M. visible F. on N. otherwise G. extraordinarily O. resisted H. which
【答案解析】语篇衔接。otherwise=differently；in the other way意为“不同地，用别的方法”，如：I hate him and I won't pretend otherwise(=pretend I don't)．我恨他，而且我也不假装。根据原文，定点喷洒农药是采用其他方法所耗农药的50%到70%，所以选项N正确。句意：这样，农民针对病害定点喷洒所消耗的农药是采用其他方法所需农药的50%到70%。