Which of the following is a characteristic of perfect competition? A: . A single seller. B: . A small number of buyers. C: . Buyers and sellers are price setters. D: . Buyers and sellers are price takers.

The circular-flow diagram illustrates that, in markets for the factors of production, ( ) A: households are sellers, and firms are buyers. B: households are buyers, and firms are sellers. C: households and firms are both buyers. D: households and firms are both sellers.

In a market, the marginal buyer is the buyer A: whose willingness to pay is higher than that of all other buyers and potential buyers. B: whose willingness to pay is lower than that of all other buyers and potential buyers. C: who is willing to buy exactly one unit of the good. D: who would be the first to leave the market if the price were any higher.

18) According to the circular flow model A: . in the market for goods and services, households are buyers and firms are sellers. B: . the market for goods and services, households are sellers and firms are buyers. C: . in the market for factors of production, households are buyers and firms are sellers. D: . firms are the owners of the factors of production.

Which of the following statements are correct？（ ） A: Agents and brokers can act as intermediaries to connect members of the marketing channel. B: Agents and brokers can operate on behalf of sellers. C: Agents and brokers can operate on behalf of both buyers and sellers. D: Agents and brokers can operate on behalf of buyers.

You should communicate effectively with _______ or buyers.

The story should act as a warning to other _______ buyers.

I can hardly of $200 for the camera the buyers.

The first shipment of pens has turned out to the ________of the buyers.

Good packaging not only protects the content but also recommends the buyers.