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
2012-06-18
46
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 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 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 40 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 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 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
依据文章第三段第二行。
转载请注明原文地址:https://kaotiyun.com/show/OunO777K
0
考博英语
相关试题推荐
NoothernewspapercolumnisthasmanagedasyettorivalAnnLanders’popularityintermsofreadership.
Therealizationthatthemosteconomicallysignificantsanctionscannotsurviveposesanewdanger:thateffectivesanctionswil
Heisa(n)______andwell-behavedchild,buthisparentsworryabouthimforhetalkstoolittle.
Hewassoconvincedthatpeopleweredrivenby______motivesthathecouldnotbelievethatanyonecouldbeunselfish.
Japanesescientistsareatlastactivelyenteringthedebateoverthegovernment’scontroversialreformplan,whichtargetsnot
WhenapolicemanappearedatthedoorIwasprettytakenaback.Imagine______.
Allspecialistsagreethatthemostimportantconsiderationwithdietdrugsiscarefullytherisksandbenefits.
Ifonedoesnotpickup(his)dry-cleaning(within)thirtydays,themanagementisnot(obligated)toreturnit(back).
We’veallheardaboutwhalewatchingfromboatsorshore,andafewcompaniesarenowofferingthepossibilityofactuallyswimmi
随机试题
有关糖尿病患者的用药指导和健康教育,正确的有
在铣床上采用仿形夹具进行仿形铣削,若滚轮与模型之间的接触压力过小,会影响仿形精度。()
脑脊液氯化物浓度低于多少,有可能导致中枢抑制而呼吸停止
早产儿肺部发育不完全,易发生的疾病是( )。
在心理测验中,智力测验属于()。
北京大学毕业的学生其语言表达能力都比较强,章子羽具有很强的语言表达能力,因此( )。
以下为某省的人口失业率图表。其中,黑色部分表示该省全省人口各个年龄段的失业率,白色部分表示该省城镇人口各个年龄段的失业率。假设该省城镇人口占全省总人口的,且二者各年龄段就业人口平均分配,则城镇哪个年龄段的失业人员人数最接近全省30——34岁年龄段失业
某单位员工中有90%的人是基民(购买基金),80%的人是炒股的股民,已知在是股民的前提条件下,还是基民的人所占的比例至少是________.
在VisualFoxPro中,数据库表字段的有效性规则的设置可以在
CommonDialog控件可以显示______种对话框。
最新回复
(
0
)