【单选题】A price floor
A.
changes the equilibrium price if it is imposed in black markets.
B.
changes the price and quantity if it is set below the equilibrium price.
C.
changes the price and quantity if it is set above the equilibrium price.
D.
does not create a black market if it is set above the equilibrium price.
【单选题】Refer to Exhibit 5-3. For a price floor to be binding in this market, it could be set at
C.
a price between $15 and $20.
D.
None of the above are true.
【简答题】当 x → 0时, x - sin x 是关于 x 的 阶无穷小。
【单选题】当x→0时,x 2 -sin x是x的( )。
【判断题】当 x → 0 时, x -sin2 x 与 x 是同价的无穷小量。
【判断题】To be binding, a price floor must be set above the equilibrium price.
【单选题】当x→0时,sin x·cos x与x比较是( )。
【判断题】A price floor set above the equilibrium price is a binding constraint.