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| 文章出处：学生大考试站 发布时间：2005-10-12 |
perts 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. He 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.
36. 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
正确答案是
37. 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
正确答案是
38. 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
正确答案是
39. 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 backing
D) its failure to help increase production
正确答案是
40. 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
正确答案是
Part III Vocabulary and Structure (20 minutes)
Directions: There are 30 incomplete sentences in this part. For each sentence there are four choices marked A), B), C) and D). Choose the ONE answer that best completes the sentence.
41. The medicine is on sale everywhere. You can get it at _______ chemist's.
A) each
B) some
C) certain
D) any
正确答案是
42. You cannot be _______ careful when you drive a car.
A) very
B) so
C) too
D) enough
正确答案是
43. In general, the _____ amount that a student spends for housing should be held to one-fifth of the total for living expenses.
A) acceptable
B) advisable
C) available
D) applicable
正确答案是
44. Every man in this country has the right to li
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