性能测试主要用于实时系统和嵌入式系统,其目标是()。 A.测试各种资源在超负荷的情况

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问题:

性能测试主要用于实时系统和嵌入式系统,其目标是()。

A.测试各种资源在超负荷的情况下的运行情况

B.检测系统可以处理目标内确定的数据容量

C.度量系统的性能和预先定义的目标有多大差距

D.验证系统从软件或者硬件失效中恢复的能力

考点:计算机等级考试软件测试工程师计算机四级软件测试工程师
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中枢性瘫痪与周围性瘫痪的主要区别是:()

A.肌力大小

B.有无感觉障碍

C.有无病理反射

D.有无大小便障碍

E.有无神志改变

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某男,23岁。面目一身俱黄,色鲜如桔色,纳呆、恶心,脘胀、胁痛、胁下有痞块,小便黄少,大便溏薄,舌红苔黄腻,脉弦数。辨证为

A.湿热蕴脾证

B.肝胆湿热证

C.寒湿困脾证

D.大肠湿热证

E.以上都不是

题型:单项选择题

下列Web安全问题中,不能通过配置数字证书,启用HTTPS解决的是()。

A.用户不仔细辨别服务器证书带来的问题

B.窃听和信息泄露

C.区分相似域名的钓鱼网站

D.传输过程中的数据加密

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球菌按其分裂方向和分裂后排列形式不同可分为双球菌、链球菌和()。

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The sudden, dramatic explosion in value of online social media sites like Facebook and Twitter is reminiscent of the rise, about 15 years ago, of the online businesses that created the "dotcom bubble. " The Internet was far less widely used than it is today. Still, visionaries saw the potential for the Internet we have today, so virtual companies sprung up and grew like weeds as investors threw money their way. Some, like Google and Amazon, developed an enduring online presence and lasting financial value. But far too many quickly lost value when it became apparent that their rapid growth wasn’t yielding revenue.

So, how much is Facebook’s network of users really worth The potential is clear—when so many people are gathered in one virtual place, offering so much personal information about themselves, they create an unprecedented platform for targeted advertising. Or they would, if they were on the network to shop. When eBay and Amazon suggest products to their customers, they’re talking to people who’ve already proven that they’re interested in buying similar products. People go on Facebook for a variety of reasons-to catch up with old friends, share pictures, make new acquaintances, and talk, sometimes endlessly, about themselves. Whether they’ll appreciate having their virtual conversations interrupted by advertising, targeted or not, remains unclear.

It’s also unclear whether Facebook will actually be able to share information about its users’ browsing habits with advertisers. Complaints about the ineffectiveness of Facebook’s privacy policies have arisen in multiple countries, part of a larger social concern about how private information gets used on line. In December, the Federal Trade Commission issued a proposed framework that, among other things, would permit Facebook users to block advertisers from accessing information about their online interests. If that framework is implemented and widely used by Facebook subscribers, it could seriously impair the site’s value as a potential platform for targeted marketing.

What is clear is that Goldman Sachs has a significant interest in Facebook’s financial value, at least for the short term. Goldman Sachs’ decision to invest heavily in Facebook has had some interesting impacts. For one thing, the investment has allowed Facebook an opportunity to postpone issuing an IPO. That means that, at least for the moment, Facebook doesn’t yet have to disclose its finances or publicly address investor complaints.

Goldman Sachs’ investment also puts the firm in an ideal position to handle Facebook’s IPO when it eventually is issued, perhaps sometime next year. That, of course, has the potential to generate substantial revenues for Goldman Sachs’ clients. Google’s 2004 IPO raised an initial $1.2 billion for the company. After all the propaganda, Facebook’s IPO can hardly be expected to raise less. However, there remains a significant question as to whether Facebook’s potential for generating income is more virtual than real. If it turns out that Facebook can’t live up to its potential for generating advertising revenue, venture capitalists who invest for the long term may get burned.

One dilemma faced by social media like Facebook is that()

A. its customers often exchange private information on it

B. advertisers often interrupt its customers’ conversations

C. the FTC threatens to limit its service with new regulations

D.the users’ private information is misused by advertisers

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