Even plant can run a fever, especially w

练习题库2022-08-02 84

问题 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 target pesticide（杀虫剂）spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest（害虫）problems.　　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.　　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. “This technique can be used on 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 ff Paley finds the financial backing which he failed to obtain 10 years ago.Infrared scanning technology may be brought back into operation because of_____________.A.the desire of farmers to improve the quality of their produceB.growing concern about the excessive use of pesticides on cropsC.the forceful promotion by theD.partment of AgricultureD. full support from agricultural experts

选项 A.the desire of farmers to improve the quality of their produce
B.growing concern about the excessive use of pesticides on crops
C.the forceful promotion by the
D.partment of Agriculture
D. full support from agricultural experts

答案 B

解析依据文章第三自然段第2行“But with the renewed concern about pesticide on produce, and refinements in infrared scanning，Palely hopes to get back into operation”，可知B项（出于对杀虫剂过度使用的担心）符合题意。

转载请注明原文地址:http://tihaiku.com/congyezige/1916761.html

本试题收录于：教师招聘小学题库教师招聘分类

教师招聘小学

教师招聘

相关试题推荐

随机试题

最新回复(0)

Even plant can run a fever, especially w

教师招聘小学

教师招聘