首页
登录
职称英语
Even plants can run a fever, especially when they’re under attack by insects
Even plants can run a fever, especially when they’re under attack by insects
游客
2025-04-09
13
管理
问题
Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3,000 feet away—straight up. A decade ago, adapting the infrared 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 40 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 Other 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 which he failed to obtain 10 years ago. [br] Plants will emit an increased amount of heat when they are_____.
选项
A、sprayed with pesticides
B、facing an infrared scanner
C、in poor physical condition
D、exposed to excessive sun rays
答案
C
解析
依据文章第二段第三行,说明植物在发“高烧”。也就是说,“身体状况”不佳时才会散发热。
转载请注明原文地址:https://tihaiku.com/zcyy/4033568.html
相关试题推荐
Thisdictionaryis_____intendedforAmericanlearnersofChinese.A、especiallyB、
The_____ofasociety,club,etc,aretherecordsofitsdoings,especiallyaspu
Accordingto_____acrosstherelevantresearchcommunity,thepublishedattackre
TheattackoftheWorldTradeCenterwillleavea____impressiononthosewhohav
Thevirusattackstheplant,theflowerdoesnotopen,and____noseedsareproduc
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsects
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsects
Evenplantscanrunafever,especiallywhenthey’reunderattackbyinsects
Hewasconcernedonlywithmundanematters,especiallythedailystockmarketqu
Theattackwasmeticulouslyplannedandexecuted.A、negligentlyB、slovenlyC、fuss
随机试题
Someobserverssaytherecentcoupofamilitarygovernmentinthatcountrywill
Peopleborninautumnlivelongerthanthoseborninspringandare【C1】_____
(1)Howtheytoiledandsweatedtogetthehayin!Buttheireffortswerere
对
综合布线系统标准中符合IEEE802.8对应的标准是()A.以太网 B.
坏血病是由于缺乏维生素C引起的。()
A.玉屏风散 B.补阳还五汤 C.当归补血汤 D.固冲汤 E.补中益气汤
在尿液中可查到的寄生虫病原体有A.蛔虫卵B.鞭虫卵C.钩虫卵D.晓虫卵E.丝虫微
流通产业结构优化的内容不包括()。A:商品流通主体的优化 B:商品流通结构的优
下列选项中,不属于房地产经纪延伸服务的有()。A.提供房地产交易信息
最新回复
(
0
)