本文探讨了巴西咖啡豆丰收对咖啡和糖市场价格的影响。根据供求原理，咖啡产量增加可能导致咖啡价格下跌，但对糖价影响不确定。同时，提到了商品价格变化可能受消费者需求、互补品价格、替代品价格及品质认知等因素的影响。此外，还涉及了商品价格变动如何影响其替代品市场，以及石油价格上升如何改变消费者对燃料的使用习惯，揭示了价格机制在资源配置中的作用。最后，讨论了航空旅行需求与飞行员需求之间的关系，指出这是一种衍生需求。
上期真题答案：1.B 2.D 3.D 4.B
接下来是今天的真题，一起练起来呀~
1.The diagrams show the markets for coffee and sugar.
In August 2013 it was reported that Brazil is forecasting a larger coffee bean harvest than in previous years. Other things being equal,this is most likely to cause.
Price of coffee Price of sugar
A Rise Rise
B Fall Fall
C Fall Rise
D No change Fall
2. A rise in the price of a good is accompanied by an increase in the quantity demanded. What could explain this?
A Consumers spend a high proportion of disposable income on the good.
B The price of a complementary good has also increased.
C The substitute goods are all very much more expensive.
D The price of the good is taken tobe an indication of the level of quality.
3. Palm oil and sunflower oil are substitutes. Palm oil and palm kernel cake for animal feed are in joint supply. Other things being equal, what will be the effects of a fall in the price of sunflower oil?
4. An increase in the price of petrol will often result in consumers economising in their use of fuel by reducing the number of journeys they make in their cars. This
A is because petrol and car journeys are in joint supply.
B shows that there is a positive cross elasticity of demand between the price of petrol and the demand for car journeys.
C illustrates the operation of the rationing function of the price mechanism.
D is because the price elasticity of demand for petrol is positive.
5 Which one of the following best describes the relationship between the demand for air travel and the demand for airline pilots?
A Composite demand
B Derived demand
C Joint demand
D Complementary demand
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