第6题
A.any movement upward or downward on the budget line will move the consumer to a less preferred point.
B.any movement to the northeast to higher indifference curves moves the consumer to a less preferred point.
C.the slope of the budget line exceeds the marginal rate of substitution by as much as possible
D.the budget line has a positive slope and the indifference curve has a negative slop
E.the budget line has a negative slope and the indifference curve has a positive slop
E.
第9题
A.乳腺炎
B.乳腺囊性增生
C.乳腺囊肿
D.乳腺发育异常。
E.巨乳症。
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