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【简答题】
We know the effect calories have on your body.For each pound of weight that your body carries,it takes about 12 calories per pound per day to keep it alive.If you weigh 150 pounds,you therefore need about (150×12) 1800 calories per day to keep yourself alive and maintain that same weight. If you were to eat more than 1800 calories per day,the surplus turns into fat.It takes about 3600 excess calories to make a pound of fat.Let's say that you were to eat,on average,2000 calories per day.That extra 200 calories per day is going to turn into fat.However,you will eventually hit a point of equilibrium(平衡，均衡) because as you gain weight,you need more calories to maintain that weight.So,a person eating an average of 2000 calories per day will hit equilibrium at (2000/12) 166.67 pounds. So let's say that you eat,on average,2000 calories per day and reach equilibrium at 166 pounds.Then you go on a crash diet where you eat only 1000 calories per day for 60 days.You lose 16 pounds and reach your target weight of 150 pounds.But then you go right back to eating 2000 calories per day again.The graph below shows your eating pattern before,during and after the diet: Note that the graph assumes that you,like most people,eat a random number of calories per day.Some days you are “good” and eat less,and some days you are “bad” and eat more,but the assumption is that it averages out to 2000 calories per day over the long run. This graph shows what happens to your weight before,during and after the diet: The diet really takes the weight off.But the weight comes right back when you return to your “normal” eating pattern.The weight appears to come back so quickly because when you are at your lightest,you tend to gain more weight each day.The lighter you are,the fewer calories you need.If you only need 1500 calories per day and you're eating 2000,you're going to gain weight faster than if you need 1800 and you're eating 2000. 小题1:The passage is mainly about_________. A．how to lose weight effectively B．why the weight comes back so quickly once a person stops dieting C．why a person puts on weight D．how to keep a healthy diet 小题2:According to the text,a person weighing 120 pounds needs _________calories per day to keep the same weight. A．1440 B．1800 C．2000 D．1000 小题3:Suppose all the following people take in 3000 calories every day.Who will gain weight fastest? A．A person who weighs 200 pounds. B．A person who weighs 180 pounds. C．A person who weighs 150 pounds. D．A person who weighs 100 pounds. 小题4:What will the writer continue to discuss at the end of the text? A．Ways to keep the weight off. B．Ways to go on a diet. C．Diseases caused by overweight. D．Proper diet to keep healthy.
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【单选题】A monopolist can:
A.
sell as much as he wants at the chosen price since he is the only seller.
B.
increase price only if he is willing to reduce output sold.
C.
increase the price of his output and still sell the same quantity.
D.
increase the price of his output and the quantity sold at the same time.
【单选题】2007年4月，中国保险行业协会与()共同研究制定的《重大疾病保险的疾病定义使用规范》出台
A.
中国保监会
B.
中国医师协会
C.
中国保险行业学会
D.
中华医学会
【简答题】在单排行星齿轮机构中,如约束太阳轮,齿圈为主动元件,行星架为从动元件,那么两者旋转方向( )。
【单选题】Graphically, the marginal revenue curve of a monopolist:
A.
lies below the demand curve of a monopolist.
B.
is the same as the demand curve of a monopolist.
C.
lies above the demand curve of a monopolist.
D.
is the same as the marginal cost curve of a monopolist.
【单选题】An increase in a monopolist’s average cost will lead to
A.
an increase in price, as the monopolist passes on the price increase
B.
an increase in price only if marginal cost also increases
C.
a decrease in price as the monopolist needs to sell more in order to cover increased costs
D.
an increase in price only if the elasticity of demand is less than 1.0
【单选题】Following excercise (2), check the incentive compatibility condition for the H quality monopolist. Which of the following statement is TRUE?
A.
It is possible for the H quality monopolist to signal his quality with advertising spending, because he can be compensated by the high profit in the 2nd period, while L quality firm cannot.
B.
It is possible for the H quality monopolist to signal his quality with advertising spending, because he can gain a higher profit than he would have gained if he were seens as a L quality firm.
C.
It is not possible for the H quality monopolist to signal his quality with advertising spending, because the sacrefice is too large to be compensated by the 2nd period profit.
D.
It is not possible for the H quality monopolist to signal his quality with advertising spending, because his profit is too low compared to the perfect information case.
【单选题】A monopolist that chooses price
A.
necessarily produces less than a monopolist that chooses quantity, hence the laws against price fixing.
B.
operates according to the Harvard tradition rather than the Chicago tradition.
C.
produces more than a monopolist that chooses quantity, thus the irony of laws against price fixing.
D.
produces the same amount as a monopolist that chooses quantity.
【单选题】Which of the following best explains why marginal revenue for a monopolist is less than the sales price?
A.
To sell more units, the monopolist must reduce price on all units sold.
B.
As the monopolist expands output, the average total cost of production declines.
C.
The monopolist charges each consumer the highest possible price.
D.
When a firm has a monopoly, consumers have no choice other than to pay the price set by the monopolist.
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