2021年大学英语四级试卷模拟五试卷答案对照版（二）

1、大学英语四级试卷模拟五试卷答案对照版（二） Questions 31 to 35 are based on the following passage. After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report; The da _ge and death toll ( _) could have been much worse. More than 60 people _d in this earthquake. By parison, a

2、n earthquake of similar intensity that shook America in 1988 claimed 25,000 victims: Injuries and deaths were relatively less in Los Angeles because the quake ourred at 4:31 a.m. on a holiday, when traffic was light on the citys highways. In addition, changes _de to the construction codes in Los Ang

3、eles during the last 20 years have strengthened the citys buildings and highways, _ them more resistant to quakes. Despite the good news, civil engineers arent resting on their suesses. Pinned to their drawing boards are blueprints (蓝图的) for improved quake-resistant buildings. The new designs should

4、 offer even greater security to cities where earthquakes often take pla _. In the past, _ structures quake resistant meant firm yet flexible _terials, such as steel and wood, that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between th

5、e building and its foundation to redu _ the impact of ground vibrations. The most re _nt designs give buildings brains as well as concrete and steel supports, called s _rt buildings, the structures respond like living organi _s to an earthquakes vibrations. When the ground shakes and the building ti

6、ps forward, the puter would for _ the building to shift in the opposite direction. The new s _rt structures could be very expensive to build. However, they would save _ny lives and would be less likely to be da _ged during earthquakes. 31. One reason why the loss of lives in the Los Angeles earthqua

7、ke was paratively low is that _? A) new puters had been installed in the buildings B) it ourred in the residential areas rather than on the highways C) large numbers of Los Angeles residents had gone for a holiday D) improvements had been _de in the construction of buildings and highways 32. The fun

8、ction of the puter mentioned in the passage is to _. A) counterbalan _ an earthquakes action on the building B) predict the ing of an earthquake with auracy C) help strengthen the foundation of the building D) measure the impact of an earthquakes vibrations 33. The s _rt buildings discussed in the p

9、assage _. A) would cause serious financial problems B) would be worthwhile though costly C) would increase the plexity of architectural design D) can redu _ the ground vibrations caused by earthquakes 34. It can be inferred from the passage that in minimizing the da _ge caused by earthquakes attenti

10、on should be focused on _. A) the increasing use of rubber and steel in capital construction B) the development of flexible building _terials C) the reduction of the impact of ground vibrations D) early forecasts of earthquakes 35. The authors _in purpose in writing the passage is to _. A) pare the

11、consequen _s of the earthquakes that ourred in the U. S. B) encourage civil engineers to _ke more extensive use of puters. C) outline the history of the development of quake-resistant building _terials. D) report new developments in constructing quake resistant building. Questions 36 to 40 are based

12、 on the following passage. Even plants can run a fever, especially when theyre under attack by insects or disease. But unlike hu _ns, 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 purpose

13、s and other sa _ites, 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

14、 have pest (害虫) problems. Even better, Paleys Remote Scanning Servi _s 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 _p sh

15、owing where plants were running fevers. Farmers could then spot-spray, using 50 to 70 per _nt less pesticide than they otherwise would. The bad news is that Paleys pany closed down in 1984, after only three years. Farmers resisted the new technology and long-term backers were hard to find. But with

16、the renewed con _rn about pesticides on produ _, 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 per _nt of agricultural land in the United States, says George Oerther of Texas A&M.

17、 Ray Jackson, who re _ntly 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 a

18、re _. A) sprayed with pesticides B) facing an infrared scanner C) in poor physical condition D) exposed to ex _ssive sun rays 37. In order to apply pesticide spraying precisely, we can use infrared scanning to _. A) esti _te the da _ge to the crops B) measure the size of the affected area C) draw a

19、color-coded _p D) locate the problem area 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 39. The application of infrared scanning technology

20、 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 40. Infrared scanning technology _y be brought back into operation because of _. A) the desire of farmers to improve the qualit

21、y of their produ _. B) growing con _rn about the ex _ssive use of pesticides on crops C) the for _ful promotion by the Department of Agriculture D) full support from agricultural experts Part III Vocabulary and Structure (20 minutes) Directions: There are 30 inplete senten _s in this part. For each

22、senten _ there are four choi _s _rked A), B), C) and D). Choose the ONE answer that best pletes the senten _. 41. The medicine is on sale everywhere. You can get it at _ chemists. A) each B) some C) _rtain D) any 42. You cannot be _ careful when you drive a car. A) very B) so C) too D) enough 43. In

23、 general, the _ amount that a student spends for housing should be held to one-fifth of the total for living expenses. A) aeptable B) advisable C) available D) applicable 44. Every _n in this country has the right to live where he wants to, _the color of his skin. A) with the ex _ption of B) in the

24、light of C) by virtue of D) regardless of 45. Housewives who do not go out to work often feel they are not working to their full_. A) capacity B) strength C) length D) possibility 46. I hate people who _ the end of film that you havent seen before. A) reveal B) rewrite C) revise D) reverse 47. Hes w

25、atching TV? Hes _ to be cleaning his room. A) known B) supposed C) regarded D) considered 48. The old couple decided to _ a boy and a girl though they had three children of their own. A) adapt B) bring C) re _ive D) adopt 49. The gover _ent is trying to do something to _ better understanding between

26、 the two countries. A) raise B) promote C) heighten D) increase 50. The newspaper did not mention the _ of the da _ge caused by the fire. A) range B) level C) extent D) quantity 51. The sol _r was _ of running away when the enemy attacked. A) scolded B) charged C) aused D) punished 52. Had he worked harder, he _ the exams. A) must have got through B) would have got through C) would get through D) could get through 53. Only under special circumstan _s _ to take _ke up tests. A) are freshmen per