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【单选题】
已知粒子在一维矩形无限深势阱中运动，其波函数为： （）A.
A
B.
B
C.
C
D.
D
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反馈参考答案：
举一反三
【单选题】If an increase in income results in a decrease in the quantity demanded of a good, then for that good, the _________
A.
income elasticity of demand is negative
B.
cross-price elasticity of demand is negative
C.
price elasticity of demand is elastic
D.
income elasticity of demand is positive
【单选题】If macaroni and cheese is an inferior good, then a decrease in income results in
A.
an increase in the demand for macaroni and cheese.
B.
a decrease in the demand for macaroni and cheese.
C.
an increase in the supply of macaroni and cheese.
D.
a decrease in the supply of macaroni and cheese.
E.
Both answers A and D are correct.
【单选题】a good (or service) whose consumption declines as income rises and increases as income decreases increase in income=decrease in consumption decrease in income=increase in consumption
A.
price floor
B.
normal good
C.
substitute good
D.
inferior good
【单选题】接上题,若其他条件不变,但别国对本国出口品的需求对价格很敏感,那么本币贬值对国际收支的影响为
A.
改善国际收支
B.
恶化国际收支
C.
无法确定
D.
对国际收支没有影响
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