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
2010-07-24
33
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 (红外线的) 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 cold detect crop problems before they became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infra-red 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 infra-red 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 infra-red 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 infra-red scanning experts
C、transforming poisoned rain
D、detecting crop problems at an early date
答案
A
解析
解题的关键在于第二段中的最后一句话:Farmers could then spot-spray,using 50 to 70 percent less pesticide than they otherwise would.A项中的“resort to”的意思是“借助于”,与短文中的use同义。B、C、D项在文中也提到,但对农民节省农药似乎没有直接关系,或不是必须关系,故不选。
转载请注明原文地址:https://kaotiyun.com/show/WyN7777K
0
大学英语四级
相关试题推荐
Isitpossibletopersuademankindtolivewithoutwar?Warisanancientinstitutionwhichhasexistedforatleastsixthousan
Isitpossibletopersuademankindtolivewithoutwar?Warisanancientinstitutionwhichhasexistedforatleastsixthousan
Isitpossibletopersuademankindtolivewithoutwar?Warisanancientinstitutionwhichhasexistedforatleastsixthousan
Peoplefindthatlikehumanschimpanzees(黑猩猩)use"tools":theystriptwigs(小树枝)andusethemtotakeouttermites(白蚁)fromth
A、Thedevelopmentofcomputer.B、Howthecomputeraffectdifferentareasespeciallythebusinessfield.C、Peoplearekeenonthe
A、Becausetherearenoplants.B、Becausetherearenohumanbeings.C、Becausethereisnoair.D、Becausetherearenoanimals.C
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacr
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacr
随机试题
数据库技术的根本目标是()。
Task2A.theguardianofthefamilyhealthB.stockinguponfoodsandgiftsC.returnonthefirstdayoftheNewYearD.
下列关于碘剂的叙述正确的是
男性,54岁,10年来上腹部胀闷不适,近1年来加重,且发现下肢浮肿,牙龈易出血。查体:面色灰褐,巩膜轻度黄染,双前臂可见蜘蛛痣,腹部膨隆,可见静脉曲张,血流方向为脐以上向上,脐以下向下,肝肋下未触及,脾肋下2指,腹部移动性浊音(+),液波震颤(+),下肢凹
宪法观念是人们对历史和现实中的哪些对象进行认知和评价?()
有权审理仲裁案件的机构是( )。
2014年11月1日第十二届全国人民代表大会常务委员会第十一次会议通过了《关于〈中华人民共和国民法通则〉第九十九条第一款、(中华人民共和国婚姻法)第二十二条的解释》,这一解释属于()。
张某劫持了甲与乙,然后命令甲杀死乙,否则将杀死甲。甲被逼无奈用绳子勒死了乙。根据刑法规定,甲的行为属于()
【B1】【B3】
Archaeologyhaslongbeenanacceptedtoolforstudyingprehistoriccultures.Relativelyrecentlythesametechniqueshavebeen
最新回复
(
0
)