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【单选题】
下列对于纯公共物品在消费上的非竞争性 ( non-rivalness ) 特征的说法中,错误的一项是?A.
在 消费 过程中一些人对某一 产品 的消费不会影响另一些人对这一产品的消费，受益者之间不存在利益 冲突 。
B.
在某种产品的数量给定的条件下，增加 消费者 的 边际成本 为零。
C.
消费的非竞争性是指某一个人或厂商在对 公共物品 或 服务 享用的同时，并不排斥和妨碍别人或厂商对其的享用，而且也不会减少其他人或厂商享用该种公共物品或服务的数量与 质量 。
D.
一块蛋糕，你吃了，别人就不能吃这块蛋糕，面对这一块蛋糕，你和别人在消费上是有非 竞争 的
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举一反三
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A.
a piece of ground
B.
a female
C.
an egg
D.
a chick left alone by its parents
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A.
Thank you.
B.
OK.
C.
How can I resist such a gracious invitation!
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A.
serviceman
B.
servantman
C.
servemen
D.
servicemen
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