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【单选题】
党的十八大以来，为更好的适应我国国家安全面临的新形势新任务实现国家长治久安，我们党明确提出了总体国家安全观。总体国家安全观的宗旨是( )A.
政治安全
B.
人民安全
C.
军事安全
D.
经济安全
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【简答题】A．酸碱法 B．水醇法 C．醇醚法 D．活性炭 E．盐析法 欲纯化总皂苷通常采用的方法是 ( ) 提取生物碱常用的方法是( ) 除去生药中多糖常用的方法是( ) 在溶液中加入无机盐促使有效成分析出的方法是( )
【单选题】Which of the following outcomes is typical of a price ceiling that is set below the market equilibrium price?
A.
Less of the good is produced with the price ceiling than would be produced without it.
B.
The price ceiling has no effect on the market equilibrium.
C.
Consumers can buy more than the market equilibrium quantity because the price ceiling is below the market price.
D.
More of the good is produced with the price ceiling than would be produced without it.
【单选题】A binding price ceiling creates
A.
a shortage
B.
a surplus
C.
an equilibrium
D.
a shortage or surplus depending on whether the price ceiling is set above or below the equilibrium price.
【单选题】If a price ceiling is a binding constraint on the market,
A.
the equilibrium price must be below the price ceiling.
B.
the equilibrium price must be above the price ceiling.
C.
the forces of supply and demand must be in equilibrium.
D.
it will have no effect on supply or demand.
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