Even plant can run a fever, especially when they’re under attack by insects or disease. But unlike human, plants can have their temperature taken from 3, 000 feet away straight up. A decade ago, adopting the infrared （紅外線）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 （殺蟲劑）spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest （害蟲）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 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 ff Paley finds the financial backing which he failed to obtain 10 years ago.

1. 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

2.．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

3. 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

4. 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 support

D. its failure to help increase production

5. Infrared scanning technology may be brought back into operation because of_____________.

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

 

1.C

2.D

3.A

4.C

5.B

【解析】

本篇是一篇說明文，主要介紹了將原用于軍事和衛(wèi)星的紅外線掃描技術(shù)運(yùn)用于農(nóng)業(yè)的前景，人們?yōu)榇怂龀龅呐坝龅降睦щy。

1. C。細(xì)節(jié)理解題。依據(jù)文章第二自然段第2行“．．．an infrared scanner measured the heat emitted by crops．The data were transformed into a color-coded map showing where plants were running‘fevers’”，說明植物在發(fā)“高燒”，也就是說，“身體狀況”不佳時(shí)才會(huì)散發(fā)熱，所以選項(xiàng)C符合題意。

2. D。推理判斷題。本題要求判斷使用紅外線掃描技術(shù)的目的。依據(jù)文章第二自然段第4行“．．．showing where plants were running ‘fevers’．Farmers could then spot spray，．．．”說明目的是確定有問題的區(qū)域，以使農(nóng)民有針對(duì)性地噴殺蟲劑。顯然，選項(xiàng)D（確定有問題的地域）為最佳選項(xiàng)。

3. A。細(xì)節(jié)理解題。依據(jù)文章第二自然段最后一句“Farmers could then spot-spray, using 50 to 70 percent less pesticide than they otherwise would”（采取點(diǎn)噴，農(nóng)民們可以節(jié)省平時(shí)用量的50％至70％的殺蟲劑），選項(xiàng)A符合題意。

4. C。推理判斷題。依據(jù)文章第三自然段的第1句“The bad news is that Palely’s company closed down in 1984，　after only three years．Farmers resisted the new technology and long-term backers were hard to find”，從中可以看出紅外線掃描技術(shù)應(yīng)用于農(nóng)業(yè)遇到了一些問題，原因有兩個(gè)：一是農(nóng)民對(duì)新技術(shù)的抵制，二是難以找到長期贊助商。文章中還有一處明顯的提示出現(xiàn)在最后一句：“But only if Palely finds the financial backing which he failed to obtain 10 years ago”．從該句提供的信息同樣可以反推出10年前的情形，所以選項(xiàng)C正確。

5. B。細(xì)節(jié)理解題。依據(jù)文章第三自然段第2行“But with the renewed concern about pesticide on produce, and refinements in infrared scanning，Palely hopes to get back into operation”，可知B項(xiàng)（出于對(duì)殺蟲劑過度使用的擔(dān)心）符合題意。

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