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
31
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
DuringMcDonald’searlyyearsFrenchfriesweremadefromscratcheveryday.RussetBurbankpotatoeswere【1】,cutintoshoestrin
Peoplethinkingabouttheoriginoflanguageforthefirsttimeusuallyarriveattheconclusionthatitdevelopedgraduallyas
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【1】hebelievedthatindividu
Thedifferencebetweenaliquidandagasisobvious【1】theconditionsoftemperatureandpressurecommonlyfoundatthesurface
In1906muchofSanFranciscowasdestroyedbyanearthquakeandthefiresthat
Housewiveswhodonotgoouttoworkoftenfeeltheyarenotworkingtotheirfull
TheGermangeneralstaffmadeanotherdangerousconcessiontowhattheyconsideredamilitarynecessity.Theplanwouldbe______
Thepeoplefortheexperimentwerechosencompletely______.
Writinginastraightforwardasopposedto______style,theauthorproduced______argumentthatshednewlightonacontroversia
Thedepartmentchairman______withthankstheassistanceofallthefacultymembersforgettingthecelebrationreadyinashort
随机试题
感染性心肌疾病中最主要的病原体是
下列最符合新生儿生理性黄疸的是
下列关于建设单位的安全责任,表述正确的是( )。
中期财务报表是指以一年的中间日为资产负债表日编制的财务报表。()
最有名的四川手杖产品有()。
世界上最早系统论述教育教学思想的专著是《论语》。()
人民检察院审查批准逮捕犯罪嫌疑人由检察长决定。重大案件应当提交()讨论决定。
在一个数据库中已经设置了自动宏AutoExec,如果在打开数据库的时候不想执行这个自动宏,正确的操作是
WhenJulesVernewroteJourneytotheCenteroftheEarthin1864,thereweremanyconflictingtheoriesaboutthenatureofthe
Youwillhearachairmandeliveringareportatanannualconferencewhichwillbeallowedtoreadonline.Asyoulisten,fo
最新回复
(
0
)