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【简答题】
简述 diazepam 的作用机制、药理作用及临床应用。
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举一反三
【单选题】Which of the following is true about producer surplus?
A.
Producer surplus is how much more it costs sellers than they are paid.
B.
Producer surplus is shown graphically as the area under the demand curve but above the supply curve.
C.
An increase in the market price due to an increase in demand will increase producer surplus.
D.
All of the above are true about producer surplus.
【单选题】Total surplus with a tax is equal to
A.
consumer surplus plus producer surplus.
B.
consumer surplus minus producer surplus.
C.
consumer surplus plus producer surplus minus tax revenue.
D.
consumer surplus plus producer surplus plus tax revenue.
【单选题】If the price rises from P1 to P2, consumer surplus decreases by the area:
A.
ABP2.
B.
AFP1.
C.
BGF.
D.
P1P2BF.
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