下列反应的离子方程式中正确的是(    )

    “If you agree with me，please Dianzan.”Do you know Dianzan is one of the most popular words on the Internet？When you think someone's ideas are right，when you think someone's articles are 1，or when you are moved by what someone writes，you can

    click （点击）the praise sign. Anyhow，clicking the praise sign 2that you agree with someone or praise someone.

    Dianzan is a kind of Chinese Internet language.People 3 use it when they surf the Liternet.There is a function（功能）of Dianzan in the QQ space.The QQ space has had the function 42010.It didn't become very popular until Sina blog（新浪博客）5the function of Dianzan.In recent years，it has become more and more popular.When the 2015 New Year came，Chinese leader Xi Jinping used the word Dianzan to praise and 6his thanks to the great Chinese people.

    Websites can know how many people support some ideas 7counting how many people click the praise sign.Experts can know 8teenagers are caring about through what they click the sign for.That can help them solve teenagers'9.

    Clicking the praise sign is really a（n） 10thing.Have you ever clicked the sign for anybody on the Internet

如图所示，左右两个容器的侧壁都是绝热的、底部都是导热的、横截面积均为S．左容器足够高，上端敞开，右容器上端由导热材料封闭．两个容器的下端由容积可忽略的细管连通．容器内两个绝热的活塞A、B下方封有氮气，B上方封有氢气．大气的压强为p₀，外部气温为T₀=273K保持不变，两个活塞因自身重力对下方气体产生的附加压强均为0.1p₀．系统平衡时，各气体柱的高度如图所示．现将系统的底部浸入恒温热水槽中，再次平衡时A上升了一定的高度．用外力将A缓慢推回第一次平衡时的位置并固定，第三次达到平衡后，氢气柱高度为0.8h．氮气和氢气均可视为理想气体．求：