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
82
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://kaotiyun.com/show/r73d777K
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
Ecologicaleconomicsrecognizesthathumansandtheireconomiesarepartsoflargernaturale-cosystemsandco-evolvewiththose
Ecologicaleconomicsrecognizesthathumansandtheireconomiesarepartsoflargernaturale-cosystemsandco-evolvewiththose
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
随机试题
奶牛,5岁。证见精神沉郁,食欲、反刍停止,口渴喜饮,鼻镜干燥,排粪带痛,病初粪便干硬,附有血丝或黏液,继而粪便稀薄带血,气味腥臭,甚至全为血水,血色鲜红,小便短赤。口色鲜红,口温高,苔黄腻,脉滑数。该病可首选针刺
中年男性,50岁,左侧上后牙诊断为牙隐裂引起的急性根尖炎,其隐裂为近远中走向,现已作完根管治疗,下一步必须
A.柴胡疏肝散合平胃散B.胃苓汤C.膈下逐淤汤D.附子理中丸合五苓散E.一贯煎合猪苓汤
在五输穴中,经气所行为在五输穴中,经气所出为
关于财务比率的计算公式,以下说法正确的有()
对于一个完整的工业投资项目而言,下列各项中,属于营业期应考虑的相关现金流量有()。
下列不属于奥尔夫声势活动中最基本动作的是()。
幼儿上课说话,给以罚款,屡罚不改者,嘴巴上贴“封条”。这是发生在某幼儿园的怪事。该班幼儿乐乐、西西因上课大声说话,嘴巴当场贴上胶布。这个班的带班教师张某在接受记者采访时表示,之所以采取上述极端措施,是因为个别孩子素质太差,拿他们实在没有办法。问题
在“三八妇女节”期间,李老师围绕节日开展系列教育教学活动,这一系列活动可称为()
(1)使用向导建立一对多报表report_c,选择父表employee中仓库号、职工号、姓名字段以及子表orders中除职工号以外的全部字段,报表按仓库号升序排序,报表样式选择简报式,报表标题是“职工订单汇总”。(2)使用SQL命令建立视图vie
最新回复
(
0
)