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
28
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.
Infrared scanning technology may be brought back into operation because of ______ .
选项
A、the desire of farmers to improve the quality of their produce
B、growing concern about the excessive use of pesticides on crops
C、the forceful promotion by the Department of Agriculture
D、full support from agricultural experts
答案
B
解析
细节题。根据文章的第三段的第二行可得出答案。
转载请注明原文地址:https://jikaoti.com/ti/VFDsFFFM
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
Nowadays,airtravelisvery【C1】______WearenotsurprisedwhenwewatchonTVthatapoliticianhastalkedwithFrenchPresiden
Whatisthemostfundamentaldifferencebetweenplantsandanimals?
Ecologicaleconomicsrecognizesthathumansandtheireconomiesarepartsoflargernaturale-cosystemsandco-evolvewiththose
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
随机试题
______isknowntoall,Englishisoneofthemostwidelyusedlanguagesininternationalcommunication.
Zollinger—Ellison综合征
临床化学酶活力测定一般采用
挥发油的化学组成中,所占比例最大的是()。
要求:根据上述资料计算下列资产负债表中的有关项目金额:存货、应收账款、预收账款、应付账款、预付账款。
本案例涉及的加工贸易合同备案手续应为()。如该出口服装列入《输欧纺织品和服装出口临时管理商品目录》管理、法定检验,除出口货物报关单外,成品出口申报时还必须向海关提交的下列哪些单证()。
下列关于抽样误差的表述正确的有()。
设二阶连续可导,又,求f(x).
有以下程序#includemain(){intk=5,n=0;while(k>0){switch(k){default:break;case1:n+=k;case
A、Australian.B、Austrian.C、Canadian.D、English.A
最新回复
(
0
)