Palmitic and stearic acids are examples of what（）
A. Saturated Fatty Acids
B. Monounsaturated Fatty Acids
C. Polyunsaturated Fatty Acids
D. Polyunsaturated Fatty Acids
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森林资源作为直接实物资源，又包括（）
A. 林地资源 B． C． D
B. 林木资源
C. 其他植物资源
D. 野生动物资源
Suppose there is an advance in technology that allows the automobile industry to manufacture automobiles more cheaply. We would expect（）
A. an increase in both the equilibrium price and the equilibrium quantity of automobiles
B. a decrease in both the equilibrium price and the equilibrium quantity of automobiles
C. an increase in the equilibrium price and a decrease in equilibrium quantity of automobiles
D. a decrease in the equilibrium price and an increase in the equilibrium quantity of automobiles
The position and slope of the budget line are determined by（）
A. consumer’s income
B. consumer’s preference
C. consumer’s income and the prices of goods
D. consumer’s income, preference, and the prices of goods
Pure monopoly is characterized by（）
A. one firm, with no competitors, that produces a product with no close substitutes
B. many firms that produce a homogeneous product
C. many firms that produce slightly different products that are close substitutes
D. such a small number of firms that each must figure out how the others will respond to its own actions
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