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【单选题】
图示的容器 a 中重度为 r1 的液体，容器 b中密度为 r1和r2 的两种液体，则两个容器中曲面 AB 上压力体及压力（ ）【图片】A.
压力体相同，但压力不相等
B.
压力体相同，且压力相等
C.
压力体相同，但压力不相等
D.
压力体不同，但压力相等
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举一反三
【单选题】If consumers view cappuccinos and lattés as substitutes, what would happen to the equilibrium price and quantity of lattés if the price of cappuccinos rises?
A.
Both the equilibrium price and quantity would increase.
B.
Both the equilibrium price and quantity would decrease.
C.
The equilibrium price would increase, and the equilibrium quantity would decrease.
D.
The equilibrium price would decrease, and the equilibrium quantity would increase.
【单选题】If consumers often purchase muffins to eat while they drink their lattés at local coffee shops, what would happen to the equilibrium price and quantity of lattés if the price of muffins falls?
A.
Both the equilibrium price and quantity would increase.
B.
Both the equilibrium price and quantity would decrease.
C.
The equilibrium price would increase, and the equilibrium quantity would decrease.
D.
The equilibrium price would decrease, and the equilibrium quantity would increase.
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