Even plants can run a fever, especially when theyre 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 spraying rather than rain poison on a whole field, which invariably includes plants that dont have pest problems.
Even better, Paleys 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 Paleys 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 Oerther of Texas AM. 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.
26. Plants will emit an increased amount of heat when they are _______
A) sprayed with pesticides B) facing an infrared scanner
C) in poor physical condition D) exposed to excessive sun rays
27. In order to apply pesticide spraying precisely, we can use infrared scanning to _______.
A) estimate the damage to the crops
B) measure the size of the affected area
C) draw a color-coded map
D) locate the problem area
28. Farmers can save a considerable amount of pesticide by _______.
A) resorting to spot-spraying B) consulting infrared scanning experts
C) transforming poisoned rain D) detecting crop problems at an early stage
29. The application of infrared scanning technology to agriculture met with some difficulties _______.
A) the lack of official support B) its high cost C) the lack of financial D) its failure to help increase production
答案解析:
这是一篇说明文。文章一开头就介绍了原用于军事和卫星的红外线扫描技术,如今被用在农业上。通过远距离测量植物的温度来判断农作物是否遭受虫害和疾病。在第二段中指出,物理学家帕里组建了帕里远红外扫描服务公司,来专门探测农业方面的情况。最后他的公司在三年后被迫关闭,主要是因为缺乏资金。另外,农民们也一时不能接受这种新技术。作者期待将来有一天可以解决财政困难,将这一新技术重新用到农业上去。
26. :。词组理解题。本文第一段的第一句话谈到:Even plants can run fever...by insects or disease.这就告诉了我们植物升高温度的原因。本句所问的也正是这个原因。因此,C正告诉了我们这一点,所以C是正确答案。
27. :词汇理解题。在第一段的原文中The goal was to let farmers precisely target pesticide spraying...其中的意思是确定而答案D是说要确定问题所在地区,信息与本文相符,故D为正确答案;而A、B、C都与本文不符。
28. :。判断题。问农民通过何种方式可节省杀虫剂。在文章的第二段中谈到帕里远红外线扫描服务公司利用飞机上的远红外线扫描仪夜间在3000英尺的高度探测到庄稼的情况,然后可将这些情况提供给农民,农民可喷洒农药,这样只使用原来农药量的50%-70%就足够了。故答案A的信息与本文相符;而B、C、D均不正确。
29. :。词汇理解题。问远红外扫描技术用于农业上时遇到的阻力,原因何在。在本文最后段中指出:1984年,帕里公司被迫关闭的原因一资金缺乏。并呼吁说:But only if Paley finds the financial backing which he failed to obtain 10years ago.其中financial backing的意思与本题C的financial support相同。所以答案C正确。
雅思TASK1图表写作套句精选50句(1)
雅思A类写作题目汇总(9-12月)
雅思TASK1图表写作套句精选50句(4)
雅思小作文怎么写:寻找表达的重点
雅思写作高频词汇-影视类(3)
雅思写作高频词汇宝典(24)
雅思话题作文范文:女性犯罪率高的原因
雅思写作常见中心句40句-2(附译文)
从评分标准中找到雅思写作高分金钥匙
雅思小作文指导:了解图形的分类规律
雅思话题作文范文:应该为了工作送孩子去幼儿园吗
雅思写作常见中心句40句-8(附译文)
雅思写作常见中心句40句-7(附译文)
雅思写作高频词汇宝典(2)
雅思写作常见中心句40句-5(附译文)
雅思图表作文如何在脑海中勾勒出data chart
雅思写作高频词汇-语言类(3)
雅思小作文指导:细节修饰
雅思小作文指导:注重连词的使用
雅思A类写作题目汇总(1-4月)
雅思写作常见中心句40句-1(附译文)
雅思话题作文范文:课外活动
雅思小作文怎么写:必要的表达方式
雅思话题作文范文:机器翻译还学外语吗
雅思话题作文范文:政府是否应控制影视暴力
雅思写作常见中心句40句-4(附译文)
雅思TASK1图表写作套句精选50句(5)
高中生备考雅思写作的五大误区
雅思写作高频词汇-语言类(2)
雅思写作常见中心句40句-3(附译文)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |