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问答题
As consumers’ incomes decrease, the demand curve for bologna sandwiches shifts to the right. Therefore bologna sandwiches are:
答案：
A.inferior goods.
B.normal goods.
C.substitute goods...
B.normal goods.
C.substitute goods...
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问答题
As consumers’ incomes increase, the demand for ground beef decreases. Ground beef is called a(n):
答案：
A.substitute good.
B.complement good.
C.normal good....
B.complement good.
C.normal good....
