单项选择题流体在圆形直管内层流动时,阻力损失与流速的关系是(A) A、正比于流速的一次方 B、反比于流速的一次方 C、正比于流速的二次方 D、正比于流速的k次方,1<k<2
单项选择题Jake experiences an increase in his wages. The hours of labor that he supplies to the market would decrease if A、the income effect is larger than the substitution effect. B、the substitution effect is larger than the income effect. C、neither the income effect nor the substitution effect apply to Jake’s laborleisure tradeoff. D、Jake views both labor and leisure as inferior goods.