If both the demand and supply increase, the equilibrium quantity ( ) and the equilibrium price ( ).
A.increases; falls
B.decreases; might rise, fall, or not change
C.decreases; rises
D.increases; might rise, fall, or not change
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Which of the following increases the equilibrium price of a used car and decreases the equilibrium quantity?
A.an announcement by the U.Attorney General that the windows on older cars were made with cheaper glass that can explode at high speeds
B.new federal legislation that raises the legal driving age to twenty-four in all states
C.a new fee that used car dealers must pay to the government on all sales of used cars
D.All of the above because each is consistent with the law of demand.
When supply and demand both increase, the
A.quantity definitely decreases.
B.quantity definitely increases.
C.price definitely increases.
D.price definitely decreases.
应CaCO3(s)= CaO(s)+ CO2(g)达到平衡时
A. φ=3
B. φ=2
C. φ=4
D. φ=1
在下列体系中自由度f = 2的体系是
A. 298K时，H2O(l)与H2O(g)成平衡
B. S(s)，S(l)，S(g)三相平衡
C2H5OH(l) 与H2O(l) 的混合物
D. 一定量的PCl5(g) 分解平衡时：PCl5(g) = PCl3(g) + Cl2(g)
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