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 （红外线）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 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.
　56．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
　57．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
　58．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
　59．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
　60．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

Would you like Helen _____ you since you have some difficulties?

　　A. helping　　　　　　　　　　　　　　　B. to help

　　C. has helped　　　　　　　　　　　　 　D. help

　　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 （红外线）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 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.

　56．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

　57．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

　58．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

　59．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

　60．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

Would you like Helen _____ you since you have some difficulties?

　　A. helping　　　B. to help  C. has helped　D. help

Make Up Your Mind to Succeed

Kind-hearted parents have unknowingly left their children defenseless against failure．The generation (age) born between 1980 and 2001 grew up playing sports where scores (marks) and performance (show) were played down because “everyone's winner.” And their report cards sounded more positive than ever before．As a result, Stanford University professor Carol Dweck, PhD, calls them “the overpraised generation.”

Dweck has been studying how people deal with failure for 40 years．Her research has led her to find out two clearly different mind-sets that have a great effect on how we react to it．Here's how they work:

　　A fixed mind-set is grounded in the belief that talent is genetic – you're a born artist, point guard, or numbers person．The fixed mind-set believes it's sure to succeed without much effort and regards failure as personal shame．When things get difficult, it's quick to blame (liability), lie, and even stay away from future difficulties.

　 On the other hand, a growth mind-set believes that no talent is entirely heaven-sent and that effort and learning make everything possible．Because the ego (自尊) isn't on the line as much, the growth mind-set sees failure as a chance rather than shame．When faced with a difficulty, it's quick to rethink, change and try again．In fact, it enjoys this experience.

　　We are all born with growth mind-sets．(Otherwise, we wouldn't be able to live in the world.) But parents, teachers, and instructors often push us into fixed mind-sets by encouraging certain actions and misdirecting praise．Dweck's book, Mind-set: The New Psychology of Success, and online instructional program explain this in depth．But she says there are many little things you can start doing today to make sure that your children, grandchildren and even you are never defeated by failure.

1.What does the author think about the present generation?

A．They don't do well at school.

B．They are often misunderstood.

C．They are eager to win in sports

D．They are given too much praise.

2.A fixed mind-set person is probably one who ___ .

A．doesn't want to work hard

B．cares a lot about personal safety

C．cannot share his ideas with others

D．can succeed with the help of teachers

3.What does the growth mind-set believe?

A．Admitting failure is shameful.

B．Talent comes with one's birth.

C. Getting over difficulties is enjoyable.

D．Scores should be highly valued.??