问题
单项选择题
效用函数描述的是总效用和（）。
A．收入
B．商品和服务的生产
C．商品和服务的消费
D．价格
答案
参考答案：C
解析：
个人被认为总是在尽量最大化他们拥有和消费的产品服务所带来的总效用或者满足感。
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效用函数描述的是总效用和（）。
A．收入
B．商品和服务的生产
C．商品和服务的消费
D．价格
参考答案：C
解析：
个人被认为总是在尽量最大化他们拥有和消费的产品服务所带来的总效用或者满足感。
Dear Seth, You are only three years old, and at this point in your life you are not able to understand this letter. But some day when you___36___, I hope you will find something __37__in what I am going to share with you. Life can be __38__ . There will be people in your life who won’t be very nice. They’ll __39___ you because you are different, 40 for no good reason . You will also face heartbreak and might be __41__ by those you love. I hope you don’t have to face these too much , but such things __42__. Be open to life anyway. You’ll find cruelty(残忍) and 43 in your journey through life , but don’t let that__44__ you from finding new things . Don’t retreat （退却）from life , and don’t __45__ or wall yourself off . Be open to new things , new experiences ,and new people . You will __46__ many times ,but if you allow that to stop you from trying , you will __47_ many chances . Do remember failure is a stepping stone to __48__. You will meet many people who will try to do __49__ than you , in school, in college, and at work. They’ll try to have nicer cars, bigger houses, nicer clothes, and so on. . To __50_ , life is a competition.However, I believe life is a __51_. If you always try your best to __52__ others, you are wasting your life . Learn to enjoy your life__53_ and you will make it a journey of __54__ ,of learning and of love. Finally , know that I love you and always will. You are _55__ a really wonderful journey , and I will always be there for you. Love Dad
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