【单选题】【消耗次数：1】
知识产权具有的四个基本特征是?
①
独占性、地域性、时间性和实用性
②
国家授予性、独占性、地域性和时间性
③
国家性、独占性、地域性和时间性
④
国家授予性、独占性、地域性和实践性
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