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
专升本
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
2011-04-26
27
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 (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 be- came 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, code map showing where plants were running "fevers". Farmers could then spot-spray, using 50 to 70 percent less pesticide than they otherwise would.
The had 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 if Paley finds the financial backing which he failed to obtain 10 years ago.
Farmers can save a considerable amount of pesticide by ______. ( )
选项
A、transforming poisoned rain
B、consulting infrared scanning experts
C、resorting to spot-spraying
D、detecting crop problems at an early date
答案
C
解析
转载请注明原文地址:https://jikaoti.com/ti/nw4GFFFM
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Insteadofresearchingandwritingtheirpapers,somestudents______.UsingtheprogramdevelopedatUniversityofCalifornia
______thetemperature,______waterturnsintosteam.
(Insomedevelopedcountries)theconsumptionofcigaretteshasbecomemoreorlessstabilized.
Flowersarealwaysa______(please)sight,especiallyinthecity.
A、weightB、eightC、heightD、neighborC
Aresomepeoplebornclever,andothersbornstupid?Orisintelligencedevelopedbyourenvironmentandexperience?Strangelye
TheUnitedStatesofAmerica_____oneofthemostdevelopedcountriesintheworld.
Thenumberofthepeoplewho______cars______increasing.
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarehornandnotmade.Althoughwewerebroughtupinthesameway
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandnotmade.Althoughwewereallbroughtupinthesame
随机试题
当需要将绘图窗口进行保存时,可以利用菜单栏中的_______命令进行保存。
弧光中的红外线可引起电光性眼炎,俗称“打眼”。
在遗传因素与环境因素相互作用中,衡量遗传因素所起作用大小的指标称________,用________表示。
A、胸腔积气B、胸腔积液C、肺气肿D、肺实变E、胸膜粘连与增厚可出现过清音
工程量清单中漏项的正确处理办法应该是()。
为完成工程项目施工,发生于该工程施工过程中招标人要求计列的费用项目为()。
班主任接管一个教育基础较差的班级时,首先要做好哪些工作?()
下列关于股份和股票的表述,错误的是()。
层次型、网状型和关系型数据库划分原则是
下列关于数据库设计的叙述中,正确的是()。
最新回复
(
0
)