【简答题】“现代汉语”通常有两种解释,狭义的解释指的是现代汉民族共同语______,广义的解释还兼指现代汉民族使用的______和 ______。
【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.
【单选题】当x→0时,x 2 -sin x是x的( )。
【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.