第76题 The wheel was probably invented by__________. A.a group of early hunters B.the first men on earth
C.a great prehistoric thinker D.the man who made the first cart Passage Fourteen
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 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-code map showing where plants were running\fevers\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~ \of agricultural land in the United States\
Jackson, who recently retired from the Department of Agricultrue, thinks re- mote 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.
第77题 In order to apply pesticide spraying precisely, we can use infrared scanning to__________.
A.locate the problem areas B.drew a color-ceded map
C.measure the size of the affected area D.estimate the damage to the crops 第78题 Farmers can save a considerable amount of pesticide by__________. A.transforming poisoned rain B.consulting infrared scanning experts C.resorting to spot-spraying D.detecting crop problems at an early date 第79题 Plants will emit an increased amount of heat when they are__________. A.sprayed with pesticides B.in pour physical condition C.facing an infrared scanner D.exposed to excessive sun rays
第80题 The application of infrared scanning technolgy to agriculture met with some difficulties due to__________.
A.the lack of official support B.its high cost
C.its failure to help increase production D.the lack of financial support
五、书面表达
第1题 假定你是Helen，要写一封信给Julie，对她和她的丈夫昨日请你和你丈夫吃饭表示感谢，表示要回请他们，以答谢他们的盛情款待。
第2题 你(Li Yuan)刚买了一块表，但你不满意，因为它总有毛病。写一封抱怨信，其内容如下：
(1)买表的时间、地点; (2)出现的问题; (3)要求退货。
第3题 The Internet
参考答案
一、1-5DBCBD 6-10ABDBC 11-15BCCAD
二、1-5BCDDC 6-10ADBAC 11-15ACDAB 16-20BACAD
21-25CCAAB 26-30AADAC 31-35DDBAB 36-40CCDDC 41-44DCCC 三、（一）1-5CABDA 6-10DADBC 11-15DBAAD (二)1-5DACBB 6-10ADABC 11-15DCDCB
四、1-4DABD 5-8ADCC 9-12ABCC 13-16BBCC 17-20BCAC 21-25DBDCD 26-30ABCAB 31-35BCCAD 36-40BDFGE 41-44BCCB 45-49DCDBA 50-53CAAD 54C 55-60CABADD
61-64BADA 65-68BADA 69-72CADC 73-76DDDA 77-80ACBD 五、1、答案：Dear Julie：
Thank you very much for the dinner that you invited my husband and I to yesterday.The food not onlylooked and smelled fabulous but tasted great，and my husband and I enjoyed it very much.Therefore，wewould like to invite you to dinner at 7 p.m.this Friday at the Northwest Chinese restaurant to return yourkindness and hospitality.
Please do come. Yours， Helen
2、 答案：Three days ago，I just got the watch I ordered from your store.You sent it on time and thanks for that.But I bmnd several problems.First，the color it not what l wanted.1 wanted golden，but you gave me silver insteac!.I thought that would be OK，if everything else is good enough The stranger thing happens.
The watch gets five minutes slower every day，So I have to keep correcting it.Because of this，I feel nerv ous about being late for work.I really cannot stand it any longer.So I have to write this letter to request giving the watch back to you and full money back to me.
Along with the letter is the copy of the order. Thank you.I am looking forward to hearing from you. Yours sincorely Li Yuan
3、 答案：The Internet
With the development of computers，the.Internet has become widely used.More and more information will be provided for people.We can get all kinds of useful information in any scientific research field whenever we need.It can help US to enrich our knowledge and help our country to keep up with the developed countries.
However，the Internet also brings US too much information.It always make US very difficult to find something available by browsing many necessary websites. In a word，we need the Internet.but we should make good use of it.