题干

How many ______ are there?

A:pencil

B:pencils

C:a pencil

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答案(点此获取答案解析)

B

同类题1

阅读理解

    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.

同类题3

阅读短文,回答问题。
点亮心灯
    有一个三十多岁的南青年,没家没业,游手好(hǎo  hào)闲,赌博打牌样样精通。他是那样坏,坏到家人都以他为耻。他没钱赌博,向人家借钱时谎称家里人得了绝症。因为他撒谎家里人从老到小都“死”过几百回了。后来,所有亲友都不再相信他,见了他如避瘟神。他落魄之极,到处混吃混喝,更加惹人厌恶(è    wù)。
    有一天,他忽然想起在省城还有一个亲戚,而且很有钱,于是他跑到那里去,说家里人得了重病,需要借三万元应急。
    一般情况下,他借几万块钱,人家只借几千或几百,但这个亲戚二话没说就把三万块钱拿了出来。
    “给,”她说,“快拿去治病﹗”
    那只是一个远房亲戚,与他家联系甚少,这样的信任对于他而言简直是奇迹。况且,从进了门,他就递上水果与热茶,并且说,累了吧,要不要洗个澡?许久以来,他如一块破布,被人扔来扔去,这忽然到来的关怀让他受宠(chǒng)若惊。
临走时,亲戚说,他们都说你说谎,说你借钱从来不还,我一直相信自己的眼光,不信你是那样的人……
    亲戚还要说下去,他的眼泪已经下来了,原来亲戚什么都知道,可她对他这样信赖,还是借三万块钱给他﹗她明明知道这三万块有打水漂的危险啊。他没有拿钱。
    下了楼,他用身上所有的钱买了张车票,来到南方。他从一个搬运工做起,最苦最累的活都做遍了。几年后,他成了一个房地产开发商,他有了自己的车子房子妻子孩子。曾经,他以为这一生没有什么指望了——三十多岁了还能做什么呢?但是他就是从三十多岁才开始自己的 ,他终于明白,只要有希望,人生从什么时候开始都不晚,而这希望,就来自一次信任。
    那年春节,他专程去了趟省城,带着一份厚礼,拜访那位亲戚。“谢谢你,点亮了我心中已经熄灭的灯,那灯,照亮了我的人生!”他说。