一、公共品(Public good) 二、是指可以供一群消费者同时消费的物品。 三、如：国防、知识、公路、绿化

Objectives of the CourseThis course is intended to help the students toimprove their English pronunciation, includingsuch elements as （1) the correct pronunciation of individualphonemes and words in English （2) the rhythmic patterns of the English language （3) patterns and functions of English intonation,so that the students will be able to communicate moreeffectively with good pronunciation and intonation

devices the techniques were tailored to gate networks of the type described above. The term gate was already in use in the forties to denote the logical elements discussed earlier. There are very many good references on Boolean algebra and we may quote only a selected few of them. Suffice it to mention the texts by Hill and Peterson [1974], Kohavi [1978], and Hohn [1966]. These books give

Objectives Focus Warming up 8.1 What seems to be the problem? 8.2 We all make mistakes –sometimes! 8.3 Complaining and apologizing 8.4 Friday afternoon: Delivery problems 8.5 Only the best is good enough 8.6 Monday morning：After-sales problems Sum-up Assignment

determine whether an application is possible No matter how good the electric, magnetic, chemical or other properties are, a material is of no use if it does not fulfill mechanical requirements hardness compressive & tensile strength

To ensure good combustion in diesel engines and reduce wear and corrosion in this type of engine it may be necessary to remove certain impurities from fuel and lubricating oils. These include ash, various salts and water present in fuel oil and carbonaceous matter, metals, acids and water present in used lubricating oil. carbonaceous

The last lecture investigated which bundle of goods the consumer prefers. However, goods cost money and the consumer cannot afford to buy indefinite amounts of each good

Consumer surplus is a measure of how much money a consumer would need to be given, in order to be just willing to give up their entire consumption of a particular good. Consumer surplus is approximately the area behind the demand curve. The change in consumer surplus following aprice change is illustrated in the second graph

Thank you ladies and gentlemen for a very warm reception. It was one hundred and forty-four years ago that members of the Democratic Party first met in convention to select a Presidential candidate. Since that time, Democrats have continued to convene once every four years and draf t a party

Good evening my fellow Americans. Ten days ago, in my report to the nation on Vietnam, I announced a decision to withdraw an additional 150,000 Americans f rom Vietnam over the nex t year. I said then that I was making that decision despite our concern over increased enemy activity in Laos, in Cambodia, and in South Vietnam