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问题详情

下列有关输入输出流的类中哪个是抽象类 ( )

A、Reader

B、FileReader

C、FileWriter

D、FileInputStream

时间：2021-09-01 17:06 关键词：青书学堂平顶山学院计算机网络技术 Java程序设计(高起专)

答案解析

B

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