地球是太阳系中既普通又特殊的行星,其特殊性主要表现在()
A.惟一有水的行星
B.八大行星中质量最小
C.既有自转运动,又有公转运动
D.适于生物的生存和繁衍
参考答案:D
Which of the following statements about the elasticity of demand is least accurate()
A. The most important determinant of price elasticity of demand is the availability of substitutes.
B. Prices are more elastic in the long run than in the short run.
C. When demand is inelastic, an increase in price will cause a decrease in the total expenditure on a good.
在计算机系统中所采用的显示器有______显示器、______显示器和LED显示器。