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（2010·吉林省长白县高三质量检测试）

假定下面是你的一个美国朋友发给你的电子邮件，请写一段120~150词的文字作为回复。

I’m just back from a holiday in China. During my stay in Qinhuangdao, a coastal city in Hebei province, I often saw a slogan reading “One World, One Dream.” I wonder why it appears here and there and I don’t really quite understand it. Could you give me some idea?

注：秦皇岛是2008北京奥运会足球项目的主办城市之一。

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净资产收益率计算公式为（）。

A.净资产收益率=（净利润÷期初净资产）×100％

B.净资产收益率=（净利润÷平均净资产）×100％

C.净资产收益率=（净利润÷期末净资产）×100％

D.净资产收益率=（净利润÷净资产）×100％