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
50
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
Wheneveryouseetheoldfilm,evenone【M1】______madetenyearsbefore,youcannothelpbeing
Peoplefindthatlikehumanschimpanzees(黑猩猩)use"tools":theystriptwigs(小树枝)andusethemtotakeouttermites(白蚁)fromth
Peoplefindthatlikehumanschimpanzees(黑猩猩)use"tools":theystriptwigs(小树枝)andusethemtotakeouttermites(白蚁)fromth
SinceWordWarⅡ,therehasbeenaclearlynoticeabletrend,especiallyamongthegrowinggroupofcollegestudents,towardearl
A、Coursesfordoctors.B、Coursesforbusinessmen.C、Coursesforreporters.D、Coursesforlawyers.B
A、Computersarecommonlyandwidelyusedinhomeandofficesnowadays.B、Computersareeasilytobeattacked.C、Adoptinggoodco
A、Byeatingvariouskindsoffish.B、Byeatinglargeamountsofplantsandsmallanimalsgrowinginverysaltywater.C、Byprovi
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacr
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacr
A、Helikesbiologyenoughtocontinuewithit.B、Hisgradesinsciencecoursesareverygood.C、Hehasn’ttakenenoughcoursesi
随机试题
女性患者,18岁,高中生,甲状腺功能亢进服他巴唑半年,症状已消失,甲状腺轻度肿大,因学习紧张常遗漏服药,今后的治疗方案应是
妊娠期淋病的治疗方案叙述不正确的是
甲诉乙的合同纠纷案件,经一审、二审法院的审理,甲胜诉。乙申请再审,法院经审查决定再审。再审过程中,乙提出反诉。对此,法院应如何处理?()
采取低价策略,一般以()为主目标。
工程量清单()是用来表述分部分项清单项目的实质内容,用于区分计价规范中同一清单条目下各个具体的清单项目。
保障人员生命安全的最基本的建筑消防系统是()。
中小板市场的推出和企业资产证券化产品的出现,是中国在建设多层次资本市场体系方面迈出的重要一步。( )
withthatthoughA.atremendousimpressionhadbeenmadeuponmeas【T1】______IhadrunintoapersonB.mixing【T2】______the
Thefitnessmovementthatbeganinthelate1960sandearly1970scenteredaroundaerobicexercise(有氧操).Millionsofindividual
ItoftenseemsthateveryoneinBritainhasamobilephone.Weusethemasalarmclocks,calculators,tohelpwithexamrevision
最新回复
(
0
)