A-Level真题每期一练（5）

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#学习

本文包含五道经济学选择题，涉及企业并购、需求价格弹性、规模收益等概念。通过具体案例帮助理解不同类型的市场整合及成本变化对企业的影响。

上期真题答案：1.A 2.C 3.C  4.D 5.D

接下来是今天的真题，一起练起来呀~

1， Dairy Crest Group is a British food producer which uses a large amount of milk in itsproduction processes to make dairy products. In March 2013, Dairy Crest Groupbought Proper Welsh Milk, a firm which specialises in selling fresh milk. This takeover could lead to advantages of

A Horizontal integration

B Backwardvertical integration

C Forwardvertical integration

D Conglomerate integration

E Externaleconomies of scale                        

2，A firm cuts the price of its product. As a result, total revenue falls and marginal cost rises. Over this range of output, it can be inferred that

A The price elasticity of demand is relatively elastic and there are diseconomies of scale

B The price elasticity of demand is relatively inelastic and there are diminishing returns to a variable factor of production

C The price elasticity of demand is unitary and there are diseconomies of scale

D The firm's marginal profit would increase

E The firm is making a loss                                                                     

3， When a firm increases all its inputs by 300%, its output increases by 200%. What does this illustrate?

A The law of diminishing returns

B Increasing returns to scale

C Diseconomies of scale

D The law of variable proportions                       

4， A firm is experiencing a fall in short run average total costs as output rises. Which of the following must be true?

A Marginal costs are falling

B Marginal costs are rising

C Marginal costs are above average total costs

D Marginal costs are below average total costs

E There are economies of scale                        

5， Barr and Britvic are two of the three largest soft drink firms in the UK. In February 2013,the proposed takeover by Barr of Britvic was referred to the Competition Commission for investigation. There were likely to have been concerns that the takeover would lead to

A Economies of scale

B An increase in consumer surplus

C A decrease in contestability

D A reduction in external economies of scale

E A signal for more firmsto enter the industry  