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【多选题】
商业模式是一家企业创造价值、传递价值以及获取价值的核心逻辑和运营机制。下列哪些选项属于典型的商业模式（ ）A.
免费模式
B.
盈利模式
C.
长尾模式
D.
平台模式
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反馈参考答案：
举一反三
【单选题】______ for quite a long time, the rivers here are all dried up.
A.
There has been no rain
B.
Having ,lo rain
C.
There having been no rain
D.
There being no rain
【简答题】Never has there been a language quite like English. A bold statement, yet nevertheless true. Consider a few statistics. Today, one out of every seven people in the world use English in some way. More ...
【简答题】()梅赛德斯－奔驰 ()宝马梅赛德斯-奔驰 ( )宝马
【简答题】放大电路引入反馈后,削弱了净输入信号,使电路的增益降低,这种反馈称为 。
【简答题】There have been a sharp decline in the death rate, andthe death rate for babies. Although still quite highly in comparison to well-developedcountries, has been significantly reduced.A. decline B. alth...
【单选题】听力原文： There is nothing quite so depressing as a house which has been shut up for a period of time. Even if it has been kept dusted and clean, there is still a musty smell and a feeling of airlessness ...
A.
A house which has been shut up for some period of time.
B.
An empty house that is usually kept clean.
C.
A comfortable house.
D.
A new house with fresh and clean smell.
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