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【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 consumptionA.
price floor
B.
normal good
C.
substitute good
D.
inferior good
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举一反三
【单选题】Which of the following statements about Greek mythology is true?
A.
Greeks believed only in one god.
B.
Greek gods and goddesses were flawless and didn't have any mental weaknesses.
C.
Greek mythology also tells the legend of heroes.
【简答题】通常函证的对象包括哪些内容?
【简答题】已知c＞0，p：函数y=c x 是R上的减函数；q：当 x∈[ 1 2 ，2] 时，函数 f(x)=x+ 1 x ＞ c 2 - 5 2 c+3 恒成立．若p∧q为假命题且p∨q是真命题，求c的取值范围．
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