陕西省神木县第六中学高中英语 Unit2 revison导学案（无答案）新人教版必修4.doc

unit2 working the land第5周第2课时 编号： 22 课题： revision编写人 班级_ 姓名_ 师评_一.学习目标1.go over the words and phrases in this unit 2.revise the grammar二.学习重点use the words and phrases properly 三.学习方法group work to finish part1&2 while individual work to finish part3.四. 学习过程part1.自主学习translation晒黑的_ 斗争_ 十年_ 特级的_产量_ 庄稼_ 饥饿_ 引起烦恼的_使变大_ 循环_ 战役_ 自由_因此_ 配备_ 谷物_ 输出_国籍_ 职业_ 性格_ 使迷惑_遗憾_ 化学的_ 生产_ 害虫_营养_ 矿物_ 发现_ 土壤_根_ 浏览_ 画底线标出_ 总结_part2.合作探究task1. 用方框内所给单词或短语的适当形式填空。be satisfied with /graduate from /struggle /lead a .life /with the hope of /rid of 1. i the result of the experiment.2. they have for years to drive the invaders out of their country.3. we all wish that we could the world crime.4.in some less developed areas in china, some farmers are still poor _ .5. after _ college, he went to shenzhen _ getting a chance to become rich soon.task2.选择题1. we have learned 3,000 words . a. during past decade b. in the past decade c. a decade ago d. after a decade 2. our monitor made it to read english every morning. a. a habit b. habit c. rule d. a duty 3. two years ago, i a high school. a. graduate for b. graduated from c. left from d. left for 4. the good weather, we can climb the mountain easily. a. because b. as c. thanks to d. because for 5. the bedroom is twice the kitchen. a. as bigger as b. bigger than c. big than d. bigger to 6. we firmly believe that war never settles anything. it only _ violence.aruns into bcomes from cleads to dbegins with7. i to him. he is too serious. a. didnt use to talk b. am not used to talking c. am not used to talk d. didnt use to talking 8. when you are confused about some words in reading, you can the dictionary. a. refer to b. look up c. check d. have a look at 9. _his help，we solved the problem.afor bbecause cthanks to ddue to10. if you want to advance yourself in your study，you will first have to _yourself of those shortcomings that can become barriers to progress.aremove bcut creduce drid11. robert is indeed a wise man.oh，yes. how often i have regretted _ his advice!ato take btaking cnot to take dnot taking12. i am wondering whether you can remember the name of the place. im afraid that _ me for the moment.areminds bworries cdisturbs descapespart3.课堂检测even plant can run a fever, especially when theyre under attack by insects or disease. but unlike human, plants can have their temperature taken from 3,000 feet awaystraight 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 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 colou-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 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.1. plants will send out an increased amount of heat when they are .a. facing an infrared scanner b. sprayed with pesticidesc. in poor physical condition d.exposed to excessive sun rays2. in order to apply pesticide spraying precisely, we can use infrared scanning to .a. estimate the damage to the crops b. draw a colour-coded mapc. measure the size of the affected area d. locate the problem area3. farmers can save a considerable amount of pesticide by .a. resorting to spot-spraying b. transforming poisoned rainc. consulting infrared scanning expertsd. detecting crop problems at an early stage4.the application of infrared scanning technology to agriculture met with some difficulties .a. its high cost b. the lack of official supportc. the lack of financial support d. its failure to help increase production5. infrared scanning technology may be brought back into o