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Trademark is a legal device that grants the inventor of a new product or process exclusive rights for a defined period to the manufacture, use, or sale of that invention.()

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Social mobility is the extent to which _____________ can move out of the strata into

The ________ was established to maintain order in the international monetary system.

生奶的抑菌作用在O"C时可保持48小时,()可保持3小时。

A. 30℃
B. 20℃
C. 10℃
D. 5℃

Late-mover advantages are handicaps experienced by being a _____________ to a market.

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