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 the
Even plants can run a fever, especially when they’ re under attack by insects or disease. But unlike humans, plants can have the
admin
2011-01-23
54
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 satelities, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones were 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 that 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、resorting to spot-spraying
B、consulting infrared scanning experts
C、transforming poisoned rain
D、detecting crop problems at an early date
答案
A
解析
事实辨别题。根据第二段的最后一句可得出答案。
转载请注明原文地址:https://kaotiyun.com/show/M73d777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Nowadays,oursocietyisbeingreshapedbyinformationtechnologies—computers,telecommunicationsnetworks,andotherdigitalsy
Nowadays,airtravelisvery【C1】______WearenotsurprisedwhenwewatchonTVthatapoliticianhastalkedwithFrenchPresiden
Nowadays,airtravelisvery【C1】______WearenotsurprisedwhenwewatchonTVthatapoliticianhastalkedwithFrenchPresiden
Whatisthemostfundamentaldifferencebetweenplantsandanimals?
Whatisthemostfundamentaldifferencebetweenplantsandanimals?
Ecologicaleconomicsrecognizesthathumansandtheireconomiesarepartsoflargernaturale-cosystemsandco-evolvewiththose
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
随机试题
张××,男性,36岁,已婚,因“畏寒、发热20天”,于2000年8月10日入院。患者20天前因“感冒”后开始出现畏寒、发热,但无寒战,发热不规则,每日体温波动在37~39℃,偶有少量出汗,伴有右下胸胀痛。曾用青霉素加氨苄青霉素治疗,效果欠佳。发
某隧道工程进行变形观测,其拱顶下沉值观测数据见下表(Yi为累计值)。试对该组数据进行回归分析后回答下述问题。根据观测数据,可判断该隧道围岩变形变化规律为()。
建设项目动态控制中的要素是()。
二进制数1100001B等价的八进制、十进制数是()。
现行使用的成本分类方法不包括()。
下列关于地震自救表述不正确的是()。
【2015年重庆云阳.判断】生产力发展水平决定着教育发展水平高低,教育的发展水平是对生产力发展的反映。()
按照ITU标准,传输速率为155.520Mbps的标准是()。
Forgetfootball.Atmanyhighschools,thefiercestcompetitionisbetweenCokeandPepsioverexclusive"pouringrights"tosel
Ifyouhadtoldmeearlier,I______(不会符合同的).
最新回复
(
0
)