单项选择题

在下图所示简单加密支付模型中，______负责加密解密用户信用卡信息。

A.发卡行
B.商家银行
C.商家服务器
D.业务服务器

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单项选择题

某计算机系统可靠性结构是如下图所示双重串并联结构，若构成系统每个部件可靠度均为0.9，即R=0.9。则该系统可靠度为（）。

A.0.9997
B.0.9276
C.0.9639
D.0.6561

单项选择题

People are indulging in an illusion whenever they find themselves explaining at a cocktail（鸡尾酒）party,say,that they are in computers, or in telecommunications, or in electronic funds transfer .The implication is that they are part of the high-tech world.Just between US,they usually aren't.The researchers who made fundamental breakthroughs in those areas are in a high-tech business.The rest of us are（）of their work.We use computers and other new technology components to develop our products or to organize our affairs.Because we go about this work in teams and projects and other tightly knit working groups（紧密联系在一起工作小组）,we are mostly in the human communication business.Our successes stem from good human interactions by all participants in the effort,and our failures stem from poor human interactions.The main reason we tend to focus on the（）rather than the human side of the work is not because it's more（请作答此空）,but because it's easier to do.Getting the new disk drive installed is positively trivial compared to figuring out why Horace is in a blue funk（恐惧）or why Susan is dissatisfied with the company after only a few months.Human interactions are complicated and never very crisp（干脆,干净利落）and clean in their effects,but they matter more than any other aspect of the work.If you find yourself concentrating on the（）rather than the（）,you're like the vaudeville character（杂耍人物）who loses his keys on a dark street and looks for them on the adjacent street because,as he explains, The light is better there! .

A.trivial
B.crucial
C.minor
D.insignificant

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