在Turbo linux中,使用命令:$mkdir-m abcd其中参数m的作用是:()。
A.设置日期
B.设置子目录
C.设置许可权限
D.设置目录大小
参考答案:C
新生儿每日热量的需求约为()
A.80~100kcal/kg
B.90~100kcal/kg
C.100~110kcal/kg
D.100~120kcal/kg
E.100~130kcal/kg
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.