题干

1876年一位封建地主说:“街上到处都是热烈的气氛。成群的农民和绅士都站在宫殿前,大声呼喊着‘万岁!万岁!’……解放法令颁布十五个月后,当我再看到农民时,我只有敬慕他们。他们同以前的主人交谈时,就像一个平等的人在同另一个平等的人交谈。”假设这位封建地主所说的是真实的,那么农民发生这一变化的主要原因是(  )

A:农奴从法律上获得了人身自由

B:可以高价赎买到一块份地

C:摆脱农奴主控制,归村社严格管理

D:彻底摆脱封建束缚

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A

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    Google, one of the world's outstanding tech companies, was attacked. It wasn't its search engine that was attacked or its advertising platform or even its social network, Google+. Instead, it was a building.

    Two web security experts hacked (侵入) into its Wharf 7 office in Sydney, Australia, through Google's building management system (BMS). One of them, Billy Rios, says, “My colleague and I have a lot of experience in web security, but it is not something that people couldn't learn. Once you understand how the system works, it is very simple.”

    They found the system on Shodan, a search engine that lists devices connected to the Internet, and then ran it through their own software to identify who owned the building. In the case of the Google hacking, the researchers had no immoral purpose and just informed Google about what they found.

    According to Mr. Rios, Who runs security company Whitescope, there are 50,000 buildings currently connected to the Internet, including research institutes, churches and hospitals, and 2,000 of those are online with no password protection. Martyn Thomas, a professor of IT at Gresham College in the UK, says, “It is beyond doubt that attempts to attack building management systems arc happening all the time.”

    Making a building smart generally means connecting the systems that control heating, Hating and security to the Internet and the wider corporate network. There was a strong reason for doing this, said Andrew Kelly, principal security consultant at defence company Qinetiq.

    “Energy savings are the biggest factor in connecting building management systems to the corporate network,” he says. “It gives those who run the building better control and offers between 20% to 50% in energy savings,” he adds.

    But it also makes them less secure. And if any of these feels like a Hollywood film, think again.