运用托里拆利实验测量标准大气压，待玻璃管中的水银不再下降时，其高度为____mm，将玻璃管倾斜一定角度，水银柱的竖直高度差____（选填“变大”“变小”或“不变”），由此得出标准大气压约为P₀=____Pa

（2015·海南）下列属于公民个人合法财产的是（）

1774年，科学家拉瓦锡加热氧化汞产生气体，后来该气体被命名为“氧气”。该反应的化学方程式为2HgO＝Hg＋O₂↑,则该反应的类型属于(   )

C

    In the USA, it is normal for men to shake hands when they meet, but it is quite unusual for men to kiss when they greet each other. Greetings are casual-a handshake, a smile and a "hello" will do just fine.

    The British often simply say "hello" when they met friends. They usually shake hands only when they met for the first time. Social kissing, often just a peck(轻吻)on the cheek(脸）, is common in an informal（非正式的）situation between men and women and also between women who know each other very well.

    In Japan, the common greeting for both men and women is to bow when they greet someone, instead of giving a handshake or a hug.

    Hungarians like to greet in a friendly way —kiss each other on both checks. The most common way is to kiss from your right to your left. When men met for the first time, a handshake is the norm.

    In Albania, men shake hands when greeting one another. A kiss on the cheek may be also common if there is a close relationship. Women may shake hands or kiss each other on both cheeks.

    In Armenia, by tradition, a woman needs to wait for a man to offer his hand for a handshake. Between good friends and family members, a kiss on the cheek and a hug are also common.

根据短文内容，选择最佳选项。