在这样的市场中，商品供应通常很有弹性。无论从近期还是从长远看，对于制造商来说，供应随着市场的需求而变化。改变一个公司的产量结构要比改变一个矿井或农场的生产容易。当需求变化不太快的时候，可以把从一家工厂所获得的毛利抽走投资在其他不同的产品上。生意好的时候，就不断进行新的投资以使生产能力满足日益变化的需求。工人们自己也许意识不到通过他们的劳动所生产出的最终产品的变化，各个级别的产业工人们的工资水平很少受到某个特定市场情形的影响。

Passage 3

在学问上打下坚实的基础将使你终生受益。在学习的初级阶段，学校所有科目中最重要的是语言和数学。语言是阅读和交流的工具，中文不能，你就不能很好地表达自己；没有很好的掌握一门外语，你就会发现很难吸收外国的新知识。数学能训练人的逻辑思维。其他学科也各有用处，很难说哪一门更重要。比如，体育和音乐教育对于促进人的智力发展同样是重要的。

To set up a solid foundation on knowledge will benefit you for a lifetime. At the primary period of study, the most important subjects are Language and Math. Language is a tool for reading and communication: if you can’t use Chinese well, then you cannot express yourself excellently; not having grasped a foreign language well, you will find it difficult to accept the new foreign knowledge. Math can help people to practice logical thinking. Other subjects are also very useful, and it’s hard to say which is more important. For example, on promoting the development of intelligence, physical and musical education are equally important.

Passage 4

文化是不同国家的人们互相理解的最佳媒介。通过举办文化节，许多中国城市在世界上的知名度提高了。已经证明，对促进中国人民和世界其他地方人民之间的交流来说，这是最好的途径之一。这种交流不仅仅限于文化方面，还扩大到了经济和其他领域。

Culture is the best medium for different people of different countries to understand each other Through holding cultural festivals，many cities in China have become better known to the world

It has been proved that this is one of the best ways to promote the exchange between the Chinese people and people from other parts of the world．The exchange has not only been confined to

culture but extended to the economic and other fields．

Passage 5

中国幅员辽阔，自然资源丰实，廉价劳动力充裕，税收低，消费者市场不断增长，基础设施不断改善。//另外，中国还有稳定的社会政治环境以及诱人的投资政策。//所有这一切对有充足资金、先进技术和管理知识的外国投资者来说都极具吸引力。//事实上，同与中国公司做生意相比，在华直接投资的经济回报率更高。

China has massive land, abundant natural resources, huge cheap labors, a growing consumer market, and better infrastructures. // China also has a stable social and political environment and appealing investment policies. // All these are very attractive to foreign investors who have sufficient funds, advanced technology and management. // As a matter of fact, compared with trading with Chinese companies, direct investment in China is more profitable. //