If a good or service has only one seller, it is called a monopoly.
A.
正确
B.
错误
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【简答题】The young boy and his father sat quietly watching the snow fall on a snowy Saturday afternoon. “Dad, my friend told me that every snowflake is 36 . But they look all the same to me. How can we tell?” ...
【简答题】The young boy and his father sat quietly watching the snow fall on a snowy Saturday afternoon. “Dad, my friend told me that every snowflake is . But they look all the same to me. How can we tell?” the...