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[单选题]
计算机安全属性中的可用性是指_______。
A
A、得到授权的实体在需要时能访问资源和得到服务B、网络速度要达到一定的要求C、软件必须功能完整D、数据库的数据必须可靠
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试题答案：
A
答案解释：
网络速度跟硬件﹑网络设计的带宽以及网络的构架等因素有关，可用性并未对其有明确的要求；软件功能完善是一个相对概念，再大的软件都可能存在功能不尽完备的情况；至于数据库数据的可靠更是无法保证的。本题的正确答案为A。
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23. Love really is blind when it comes to physical flaws, it would seem. A research conducted by Social studies Center in University of Hawaii at Manoa suggests that when we love someone, we tend to overlook their crooked noses, big tummies or other attributes that might put others off. As a result, husbands and wives think their other halves are more attractive than they really are. No wonder Chinese has the saying that “Beauty lies in the beholder’s eyes”. This phenomenon could also help explain some physically mis-matched couples such as the glamorous Beyonce and Jay-Z, the striking Lara Stone and David Walliams. The so-called “positive illusion” theory comes from an experiment in which researchers asked 70 couples to rate their other halves for attractiveness. Questions included how attractive their husband, wife, boyfriend or girlfriend was to the opposite sex, and how they rated compared with others of the same age. The answers were kept secret to prevent any partners from being upset and distressed. Some of those taking part also rated photos of their partners. In addition, members of the public judged the looks of all 140 men and women taking part. The results revealed that couples view their other halves as being better looking than they really are. Even asking them to rate pictures of their partners did not give them a reality check, the Journal of Social and Personal Relationships reports. With previous studies finding that we view our loved ones as being kinder and more intelligent than they actually are, it does seem that love is blind in all sorts of ways. Those studied were young and had been together on average for just two and a half years. The researchers said that more work was needed to see if those in long marriages were still blind to their partner’s physical flaws. With previous studies finding that we view our loved ones as being kinder and more intelligent than they actually are, it does seem that love is blind in all sorts of ways. Those studied were young and had been together on average for just two and a half years. The researchers said that more work was needed to see if those in long marriages were still blind to their partner’s physical flaws.(10分)23.1 Which of the following is the CORRECT interpretation of the first paragraph?(2分)A. When people are in love, they are unable to see things that are obvious to others.B. People in love tend to be unaware of physical weakness of their partners. C. To those who are physically weak, they do not notice love.D. When speaking of physical flaws, love is not reasonable.
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