A new term might be the best time to make new friends, but it can be hard to begin the first conversation. Below are four useful ways. Take a look.

 Search for common interests. Talking about shared interests, such as sports and popular talent shows, is the easiest way to make a successful talk with someone.

 Welcome the silence. In fact, sometimes silence is needed in order to continue a conversation. Remember that if you say something, the other person may need time to understand it.

 Keep it positive(积极的). To make great small talk, you should keep things fun. You should be cheerful and able to laugh over things that aren't very interesting. These will make the other person want to keep talking to you.

 Take it as a learning experience. Every time you meet someone from other places, it's a good chance to learn something new. You can learn more about their cultures and nations. These make you a more interesting person to talk to as well.

美国墨西哥湾钻井平台发生爆炸，至少有6000米³的石油泄漏到大海，导致石油大面积地漂浮在海面上。当海面上漂浮着大量油膜时，会造成很多危害。例如油膜会降低表层海水中的日光辐射量，使浮游植物大量死亡，从而使这个地区的海洋生态系统遭受破坏。为了堵塞漏油，事故处理部门曾用一个钢筋水泥罩罩住漏油点。已知钢筋水泥罩体积为200米³，海水密度为1.03×10³千克/米³，求钢筋水泥罩浸没在水中（没碰到海底）时受到的浮力。（取g=10牛/千克）

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