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问题 问答题

试分别解释什么是惯性耦合和弹性耦合。

答案

参考答案：惯性耦合：质量矩阵中出现的耦合项称为惯性耦合。（1.5 分）弹性耦合：刚度矩阵中出现的耦合项称为弹性耦合。（1.5 分）

改错题

I came across with an old man in rags the other day, he was begging for a living. To be frank, I didn’t know how I ought to give him some money. On the one hand, I am not born in a rich family. On the other hand, old as the man was, he was in  good health. In most people’s opinion, he should be able to earn her living instead of be a beggar. All of us ought to help those who is really in need. However, what matters is that all the people should try to depend in themselves first. Therefore our society can be much harmonious, which is we all look forward to.
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单项选择题

餐饮市场营销创新的核心是（）

A.以市场为导向

B.以产品为导向

C.以服务为导向

D.以就餐环境为导向
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