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问题 单项选择题

假设某Pentium微处理器的段描述符中基址是00280000H，限界是00010H，G=1，则该描述符所寻址的段的结束地址是( )。

A．00280010H

B．00290000H

C．0028F000H

D．0028000FH

答案

参考答案：B

单项选择题

Pharming is a scamming practice in which malicious code is installed on a personal computer or server, misdirecting users to ___29___ Web sites without their knowledge or consent. Pharming has been called "phishing without a lure".

In phishing, the perpetrator sends out legitimate-___30___ e-mails, appearing to come from some of the Web’s most popular sites, in an effort to obtain personal and financial information from individual recipients. But in pharming, larger numbers of computer users can be ___31___ because it is not necessary to target individuals one by one and no conscious action is required on the part of the victim.In one form of pharming attack, code sent in an e-mail modifies local host files on a personal computer. The host files convert URLs into the number strings that the computer uses to access Web sites. A computer with a compromised host file will go to the fake Web site even if a user types in the correct Internet address or clicks on an affected ___32___ entry. Some spyware removal programs can correct the corruption, but it frequently recurs unless the user changes browsing ___33___

32（）

A.hypertext 

B.computation 

C.expectation 

D.bookmark
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单项选择题

患者男，70岁。反复咳嗽、咳痰30年，活动后气短12年。动脉血气分析示：PaCO250mmHg，PaO245mmHg，防止COPD发展的最有效的家庭治疗是（）

A.抗生素控制感染

B.支气管舒张剂治疗

C.吸入糖皮质激素

D.呼吸机锻炼

E.长期家庭氧疗
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