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【单选题】
What is income effect?A.
Income effect shows the change in the quantity of a good a consumer demands because of a change in income, holding prices constant.
B.
Income effect shows the change in the quantity of a good that a consumer demands when the good's price changes, holding other prices and the consumer's utility constant.
C.
Income effect shows the change in the quantity of a good a consumer demands because of a change in price, holding income constant.
D.
Income effect shows the change in the quantity of a good that a consumer demands when other prices and the consumer's utility changes, holding the good's price constant.
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【简答题】the number is unknown
【简答题】导线 长为 ,绕过 点的垂直轴以匀角速 转动, = 磁感应强度 平行于转轴,如图所示.试求: (1) 两端的电势差; (2) 两端哪一点电势高?
【单选题】I have collided with unknown object
A.
The vessel is in collision with unknown vessel
B.
The vessel is in collision with unknown object
C.
The vessel is in collision with a seamark
D.
The vessel is in collision with a light vessel
【简答题】(10分)导线 长为 ,绕过 点的垂直轴以匀角速 转动, = ,磁感应强度 平行于转轴,如图所示.试求: (1)ab 两端的电势差; (2)a,b 两端哪一点电势高?
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