首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have thei
Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have thei
admin
2015-01-09
55
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.
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://kaotiyun.com/show/o1LO777K
0
考博英语
相关试题推荐
Over-cultivationandalongperiodoferosionhasreducedthe______ofmuchofthecountry’sfarmland.
Thepolicemantriedto______theteenagedrivertoobeythetrafficlawsratherthanfinehimdirectly.
Itwastheir______decisiontoleavetheircountry,andasaresult,theylosttheircitizenship.
Atthreethousandfeet,wideplainsbegintoappear,andthereisneveramomentwhensomedistantmountainisnot______.
Today,theTowerofLondonisoneofthemostpopulartourist【1】andattractso-verthreemillionvisitorsayear.Itwasoccasio
WorkisaveryimportantpartoflifeintheUnitedStates.WhentheearlyProtestant【1】cametothiscountry,theybroughtthe【2
Thenewspaperdidnotmentionthe______ofthedamagecausedbythefire.
What______aboutthatarticleinthenewspaperwasthatitswritershowedallattitudecoolenough,professionalenoughand,ther
71.Vacationswereoncetheprerogativeoftheprivilegedfew,evenaslateasthe19thcentury.Nowtheyareconsideredtherig
Thedyingsoldierhadthemessage_____straighttotheheadquarters.
随机试题
桌椅、门把手等可以用84消毒液消毒。()
海关查验
下列因素中,对微型计算机工作影响最小的是_______。
治疗久痹风、寒、湿偏盛不明显者,可选用的方剂是
岩石的吸水率是指()。
(2010年)2009年3月11日,甲公司签发一张商业汇票,收款人为乙公司,到期日为2009年9月11日,甲公司的开户银行P银行为该汇票承兑。2009年6月30日,乙公司从丙公司采购一批货物,将该汇票背书转让给丙公司,丙公司于9月30日持该汇票到其开户银行
材料:创造主未完成之工作,让我们接过来,继续创造。宗教家创造出神来供自己崇拜。省事者把别人创造的现成之神来崇拜。恋爱无上主义者造出爱人来崇拜。美术家,如罗丹,是一面造石像,一面崇拜自己的创造。教育者不是造神,不是造石像,不是造爱人。他们所
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
Amongtheraftofbooks,articles,jokes,romanticcomedies,self-helpguidesandotherwritingsdiscussingmarriage,somefamil
Onleaving,wethankedhimmostwarmlyforthehospitality______tousandourfriends.
最新回复
(
0
)