高能化合物（high energy compound)

A、低能X射线 Low energy X-rays

B、高能X射线 High energy X-rays

C、长曝光时间 long exposure time

D、短曝光时间 Short exposure time

rial premises. It is about to launch a new product, the ‘Energy Buster’, a unique air conditioning unit which is capable of providing unprecedented levels of air conditioning using a minimal amount of electricity. The technology used in the Energy Buster is unique so Heat Co has patented it so that no competitors can enter the market for two years. The company’s development costs have been high and it is expected that the product will only have a five-year life cycle.

Heat Co is now trying to ascertain the best pricing policy that they should adopt for the Energy Buster’s launch onto the market. Demand is very responsive to price changes and research has established that, for every $15 increase in price, demand would be expected to fall by 1,000 units. If the company set the price at $735, only 1,000 units would be demanded.

The costs of producing each air conditioning unit are as follows:

Note

The first air conditioning unit took 1·5 hours to make and labour cost $8 per hour. A 95% learning curve exists, in relation to production of the unit, although the learning curve is expected to finish after making 100 units. Heat Co’s management have said that any pricing decisions about the Energy Buster should be based on the time it takes to make the 100th unit of the product. You have been told that the learning co-efficient, b = –0·0740005.

All other costs are expected to remain the same up to the maximum demand levels.

Required:

(a) (i) Establish the demand function (equation) for air conditioning units; (3 marks)

(ii) Calculate the marginal cost for each air conditioning unit after adjusting the labour cost as required by the note above; (6 marks)

(iii) Equate marginal cost and marginal revenue in order to calculate the optimum price and quantity. (3 marks)

(b) Explain what is meant by a ‘penetration pricing’ strategy and a ‘market skimming’ strategy and discuss whether either strategy might be suitable for Heat Co when launching the Energy Buster. (8 marks)

听力原文： The Kenya President Mwai Kibaki has appealed for patience while allegations of corruption against senior government officials are investigated. His call came as the Energy Minister Kiraitu Murungi and the Education Minister George Saitoti resigned after being named in connection with two corruption scandals. In a nationwide broadcast, President Kibaki said the men wanted the opportunity to prove their innocence. "Fellow Kenyans, I have today accepted the request by Professor George Saitoti to step aside for his responsibilities as minister for education, science and technology. "On Sunday the former Kenyan anti-corruption investigator John Githongo in exile in London gave testimony to visiting Kenya members of Parliament and said corruption reached high levels of the government.

Present Kihaki has called for patience of the investigation of the scandals because

A．he didn't want to approve the resignation of Education Minister.

B．the resigned officials wanted the opportunity to prove their innocence.

C．he thinks corruption hasn't reached high levels of the government.

D．John Githongo gave testimony to visiting Kenya members of Parliament.

听力原文： The Kenya President Mwai Kibaki has appealed for patience while allegations of corruption against senior government officials are investigated. His call came as the Energy Minister Kiraitu Murungi and the Education Minister George Saitoti resigned after being named in connection with two corruption scandals. In a nationwide broadcast, (8) President Kibaki said the men wanted the opportunity to prove their innocence. "Fellow Kenyans, I have today accepted the request by Professor George Saitoti to step aside for his responsibilities as minister for education, science and technology. " On Sunday the former Kenyan anti-corruption investigator John Githongo in exile in London gave testimony to visiting Kenya members of Parliament and said corruption reached high levels of the govermnent.

Present Kibaki has called for patience of the investigation of the scandals because

A．he didn't want to approve the resignation of Education Minister.

B．the resigned officials wanted the opportunity to prove their innocence.

C．he thinks conuption hasn't reached high levels of the government.

D．John Githongo gave testimony to visiting Kenya members of Parlianlent.

form. of electromagnetic radiation like light and radio waves, only of very much shorter wavelength.

The wavelengths of light and radio waves, unlike high energy gamma radiation, are much shorter.

A．正确

B．错误

线性能量传递(linear energy transfer，LET)指的是()。

A、高能射线在单位径迹中心轴上发散的能量

B、每单位径迹中心轴上长度介质吸收的能量

C、每单位径迹中心轴上长度发散的能量

D、单位径迹长度介质吸收的能量

E、以上都不对