试题与答案

【问题4】 IEEE802.11标准采取了认证和加密措施,其中 (9) 具有控制图4

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题目:

【问题4】 IEEE802.11标准采取了认证和加密措施,其中 (9) 具有控制图4-8所示的拓扑结构中无线接待室WLAN接入的能力。IEEE802.11标准提供WEP加密机制,该加密机制对数据的加密和解密都使用同样的RC4算法和密钥,包括 (10) 和数据加密这两个过程。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:Unrealistic profitability expectations from third parries is a risk factor related to incentives and pressures. The other choices are risk factors related to management’s opportunities to commit fraud.

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     Two hours from the tall buildings of Manhattan and Philadelphia live some of the world's largest black

bears. They are in northern Pennsylvania's Pocono Mountains, a home they share with an abundance of

other wildlife.

     The streams, lakes, grassland, mountain ridges and forests that make the Poconos an ideal place for

black bears have also attracted more people to the area. Open spaces are threatened by plans for housing

estates and important habitats are endangered by highway construction. To protect the Poconos' natural

beauty from irresponsible development, the Nature Conservancy(大自然保护协会)named the area one

of America's "Last Great Places".

     Operating out of a century - old schoolhouse in the village of Long Pond, Pennylvania, Cook, one of

the Conservaney's branches, is working with local people and business leaders to balance ________________________. By developing partnerships with people like Francis Altemose, the Conservancy has been able to protect more than, 14,000 acres of environmentally important land in the area.

     Altemose's family has farmed in the Pocono area for generations. Two years ago Francis worked with

the Conservancy to include his farm in a county farmland protection program, As a result, his family's land can be protected from development and the Altemoses will be better able to provide a safe financial future for their 7--year-old grandson.

     Cook attributes the Conservancy's success in the Poconos to having a local presence and a

commitment to working with local residents(英才苑居民 ).

     "The key to protecting these remarkable lands is connecting with the local community," Cook said, "The people who live there respect the land. They value quiet forests, clear streams and abundant wildlife. They are eager to help with conservation efforts."

     For more information on how you can help the Nature Conservancy protect the Poconos and the

world's other "Last Great Places ", please call 1- 888- 564 6864, or visit us on the World Wide Web at

www. tnc . org .

1. What's the purpose in naming the Poconos as one of America's "Last Great Places " ? (Please answer

within 10 words)

______________________________________________________________________________   

2. What is the passage most probably taken from? (Please answer within 10 words)

___________________________________________                 ____________________________

3. Fill in the blanks in the third paragraph with proper words and phrases.(Please answer within ten words)

__________________________________________________________________________           

4. Which sentence can be replaced by the following?

The local economic development has a negative effect on the wildlife and the environment

________________________________________________________________________________

5. Translate the underlined sentence into Chinese.

________________________________________________________________________________

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