GRE作文高频句式示例(二)_GRE写作

GRE作文高频句式示例(二)

　　22. As the case illustrates， competition takes four general forms: pure competition， monopoly， monopolistic competition， and oligopoly.

　　23. The classic example of pure competition occurs with a commodity， like wheat or corn， that has so many producers that no one of them can control its selling price.

　　24. A monopoly occurs when one company alone offers a particular food or service and therefore controls the market and price for it.

　　25. Private restaurants serve gourmet food for $70 per person; incentives boosted agricultural production 25 percent and industrial output 80 percent in just three years; farmers are encouraged to raise as much as they can on their own plots， and some become almost rich in the process.

　　26. All these changes in China s economic life have brought changes in China s social and cultural life as well， many of which unwanted.

　　27. If productivity measures the efficiency of an economy， a measure of what an economic system produces is its gross national product ， which is the current market value of all final goods and services that a nation produces within a particular period.