影响货币时间价值的主要因素包括（）。
A.单利或复利
B.通货膨胀率
C.收益率
D.投资风险
E.时间
参考答案：A, B, C, E
解析：影响货币时间价值的主要因素：①时间，时间的长短是影响金钱时间价值的首要因素，时间越长，金钱的时间价值越明显；②收益率或通货膨胀率，收益率是决定一笔货币在未来增值程度的关键因素，而通货膨胀率则是使货币购买力缩水的反向因素；③单利与复利，单利的计算始终以最初的本金为计算收益的基数，而复利则以本金和利息为基数计息，从而产生利上加利息上添息的收益倍增效应。
In China，a lot of food is wasted every year and the waste food is enough for people．The food is wasted in restaurants，at home and in schools，etc． In restaurants or at home，people often order or cook food．But they can’t eat it up．When they go out of a restaurant，full and happy，they never look back the uneaten food on the table again．Should Chinese consumers（消费者）feel for the terrible waste? In schools．we can often see a lot of students food away after meals and they only eat the food they like． Everyone is supposed to have enough food to eat．However, in some places, the food is so little a lot of people died from hunger．Although China has tried hard to solve of hunger over the past thirty years，the job is not finished yet．Food is important to us all．We live without food．So is necessary for us to love food and try to eat up everything on our plates．When we eat in restaurants，we should pack up the leftovers（剩菜剩饭）．we also need to tell other people to stop food as soon as possible．
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