energy use and institute procedures that lead to smarter and more efficient home, building and industrial plants.
Until now, wires and cables for power and connectivity have limited the widespread adoption of sensor (传感器) networks by making them difficult and expensive to install and maintain. Battery-powered wireless networks can simplify installation and reduce cost. But their high power consumption and the corresponding need for regular battery replacement has made wireless networks difficult and costly to maintain. Nobody wants to replace hundreds or thousands of window sensor batteries in a large building on a regular basis.
The promise of wireless sensor networks can only be fully realized when the wiring for both the data communication and the power supply is eliminated. Doing so requires a true battery-free wireless solution, one that can utilize energy harvested directly from the environment. To facilitate the widespread deployment of wireless sensor networks, GreenPeak has developed an ultra-low-power communication technology that can utilize environmental energy sources such as light, motion and vibration. This technology, employing on-board power management circuits and computer software to monitor energy harvesters and make the best use of harvested energy, enables sensors to operate reliably in a battery-free environment.
Wireless sensor networks deployed in our offices and home will have an enormous impact on our daily lives, helping to build a smarter world in which energy is recycled and fully utilized. These wireless platforms, equipped with advanced sensing capability, will enable us to better control our lives, homes and environment, creating a truly connected world that enables people worldwide to live in a more comfortable, safer, and cleaner environment.
62. Batteries are not an ideal energy source for sensor networks because they ______. A) require automatic recharging B) are difficult and costly to maintain C) have to be replaced from time to time D) contain metals that pollute the environment
63. Battery-free wireless sensor networks are made possible by the fact that ______. A) their maintenance has been greatly simplified B) there is energy in the environment to be utilized C) the cost of using them has been drastically reduced D) modern data communication consumes little energy
64. According to the passage, GreenPeak ______. A) supplies batteries operating on harvested energy B) benefits handsomely from communication technology C) promotes the application of wireless sensor networks D) is the first company to install wireless sensor networks
65. The focus of Paragraph 4 is on the ______. A) replacement of batteries in harvesters B) elimination of batteries in sensor networks C) impact of sensor networks on power supply
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D) monitoring of energy harvested from the environment
66. Wireless sensor networks promise to ______. A) bring businesses high profits
C) turn motion into a major source of energy D) improve the daily lives of people worldwide
B) further develop the sensing technology
Part V
Cloze (15 minutes)
Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
People who are too happy die younger than 67. A) placed their more downbeat (消沉的) peers, claims new research. A study which followed children from the “highly cheerful” by teachers at school died younger than their more 68 classmates. This was because people who were too happy C) rated D) valued C) conservative D) embarrassed C) chaos D) viruses D) very B) ranked 68. A) awkward B) reserved B) disasters 1920s to old age showed that people who were 67 69. A) disorders 70. A) more C) rather B) less were more likely to suffer from mental 69 such 71. A) danger C) risk B) opportunity D) chance as bipolar (两极情感障碍), making them 70 fearful and more likely, to take risks that increase 72. A) also B) even the 71 of having a fatal accident. Many researchers from a variety C) almost D) yet C) up of 73. A) with B) down D) in universities worldwide 72 discovered that trying too hard to be happy often ended 73 leaving 74. A) credits C) presents people feeling more depressed. B) tips D) titles C) improving And magazine articles offering 74 on how 75. A) relieving B) moderating D) worsening to be happy were also blamed for 75 depression. One study saw participants follow one of the 76. A) what
tips to see 76 effective it was. Participants then B) however
C) whatever D) how C) concentrated D) absorbed D) mood
took the advice offered — such as watching an 77. A) attracted
B) drawn
upbeat (积极乐观的) film — often 77 too hard on trying to improve their 78 rather than letting it lift naturally.
78. A) temper C) mind
B) passion
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This 79 that by the time the film had 79. A) assumed C) supposed ended, they often felt angry and 80 by the when they had started watching. 81 , results of the Psychological Science, 82 that the key to true relationships with friends and family members. 84 external recognition through success or fame. means the best 85 to increase your happiness is pour your energy 86 nurturing the social bonds you have with other people.
B) meant D) hoped D) cheated C) Therefore D) Otherwise
advice given, putting them in a far worse mood than 80. A) blamed C) discouraged
B) provoked B) Moreover
study, published in the journal Perspectives on 81. A) However
happiness was much more simple: 83 82. A) exposed C) imposed
B) disposed D) proposed
C) radical D) truthful C) or D) but C) process D) form C) into D) by
B) meaningful
B) and
The strongest predictor of happiness is not money, 83. A) initial It?s having worthwhile social relationships. That 84. A) nor to stop worrying about being happy and instead 85. A) way
86. A) to
B) method B) over Part VI Translation (5 minutes)
Directions: Complete the sentences by translating into English the Chinese given in brackets. Please write your
translation on Answer Sheet 2.
87. We lost our way in that small village, _________________________________ (否则我们就参观更多的名胜古迹了) yesterday.
88. Only after Mary read her composition the second time _________________________________(她才注意到拼写错误).
89. In order to find the missing child, villagers _________________________________(在过去的五个小时里，一直在尽最大努力).
90. _________________________________(到你读完这本书的时候), your meal has got cold.
91. Film has a much shorter history, especially when _________________________________(与音乐和绘画比起).
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四级考前最新命制试卷三
参考答案及录音文本
参考答案
Part I Writing
【参考范文一】
【参考范文二】
Part II Reading Comprehension (Skimming and Scanning) 1. B) 2. A) 3. D) 4. C) 5. D) 6. A) 7. B) 8. technology
9. fairly strict boundaries 10. responsibilities and commitments
Part III Listening Comprehension 11. B) 12. D) 13. C) 14. D) 15. B) 16. A) 17. C) 18. D) 19. C) 20. D)
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21. C) 22. B) 23. C) 24. A) 25. A) 26. C) 27. A) 28. A) 29. D) 30. C) 31. D) 32. B) 33. A) 34. D) 35. C) 36. concern 37. primarily 38. range 39. load 40. convenience 41. defend 42. leaf 43. potential
44. The definitions are simplified and somewhat unclear compared with those in ordinary print dictionaries 45. Most of these devices do not include sample sentences which are of vital importance 46. but he was not sure of its meaning, then he looked it up in a cheap dictionary
Part IV Reading Comprehension (Reading in Depth) 47. J) 48. A) 49. C) 50. F) 51. M) 52. D) 53. O) 54. K) 55. H) 56. B) 57. D) 58. C)
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