According to the passage, what are the opportunity costs of a product?
A.The amount of time and money spent in producing it.
B.The opportunities a person has to buy it.
C.The value of what could have been produced instead.
D.The value of the resources used in its production.
第9题
根据下列内容,回答 33~37 题:
A.降低毒性
B.缓和药性
C.提高成分浸出
D.矫臭矫味
E.利于贮藏
第 33 题 麸炒苍术的主要目的是()。
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