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
105
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.
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
第三段的第三句话提到了“renewed concern”,是指人们对此重新开始关心了。 A项的内容在文中没有提及。C项中说到的农业部的强有力的推广与短文有出入,短文只提到农业部一退休工作人员的观点。而D项中的内容并不是重点,而且也未必完全正确,因为最后一段只说农业专家对该技术能发挥作用毫无怀疑,但并未说他们对此全力支持。故选B。
转载请注明原文地址:https://kaotiyun.com/show/HyN7777K
0
大学英语四级
相关试题推荐
Isitpossibletopersuademankindtolivewithoutwar?Warisanancientinstitutionwhichhasexistedforatleastsixthousan
Wheneveryouseetheoldfilm,evenone【M1】______madetenyearsbefore,youcannothelpbeing
SinceWordWarⅡ,therehasbeenaclearlynoticeabletrend,especiallyamongthegrowinggroupofcollegestudents,towardearl
A、Coursesfordoctors.B、Coursesforbusinessmen.C、Coursesforreporters.D、Coursesforlawyers.B
A、Coursesfordoctors.B、Coursesforbusinessmen.C、Coursesforreporters.D、Coursesforlawyers.B
A、Thedevelopmentofcomputer.B、Howthecomputeraffectdifferentareasespeciallythebusinessfield.C、Peoplearekeenonthe
A、Shewasattackedbyrobbers.B、Shewasstoppedbyapoliceman.C、Shewasforcedtoenteraflyingsaucer.D、Shefainteddueto
A、Plantsandherbs.B、Magicpills.C、Luckcharms.D、Alloftheabove.A
A、Becausetherearenoplants.B、Becausetherearenohumanbeings.C、Becausethereisnoair.D、Becausetherearenoanimals.C
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacr
随机试题
A、气胸B、脓胸C、肺炎合并心衰D、重症肺炎E、呼吸衰竭C
10月17日,中国与毛里求斯正式签署自由贸易协定,成为我国商签的第十七个自贸协定,也是我国与非洲国家的第一个自贸协定。
为确定肝脓肿穿刺点或手术引流进路,首选的辅助检查方法是()
A.条件(1)充分,但条件(2)不充分B.条件(2)充分,但条件(1)不充分C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分D.条件(1)充分,条件(2)也充分E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联
下列各项中,()是我国证券账户的种类。Ⅰ.人民币普通股票账户Ⅱ.人民币特种股票账户Ⅲ.证券投资基金账户Ⅳ.权证交易账户
某房地产开发公司系增值税一般纳税人,2018年3月25日与政府部门签订了紫金花园项目的土地使用权出让合同。土地出让金3亿元,合同约定土地出让金于3月30日前支付,但未约定具体交付土地日期,实际交付日期4月25日。该业务的契税纳税义务发生时间在何时?简述
下列关于亳菊花的说法正确的有()。
OppositeisSt.Paul’sChurch,______youcanhearsomelovelymusic.
改善民生、实现发展成果由人民共享最重要最直接的方式是就业。()
OnJan.9,2007,SteveJobsformallyannouncedApple’s"revolutionarymobilephone"—adevicethatcombinedthefunctionalityof
最新回复
(
0
)