题目
第4题
Opportunity cost is______.
A.a cost that cannot be avoided, regardless of what is done in the future
B.the cost of doing something as measured in terms of the value of the lost opportunity to pursue the best alternative activity with the same time and resources
C.the additional cost of producing an additional unit of output
D.the additional cost of buying an additional unit of a product
第5题
Discontent with the cost and (sometimes) impersonal delivery of health care (has fueled) growth in (alternative) medicine, now a ($14 billions-a-year) industry.
A.sometimes
B.has fueled
C.alterntive
D.$14 billions-a-year
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