A. 0. 4 B. 0. 6 C. 0. 5 D. 0. 3A

Loveyou2019-12-17  6

问题

选项 A. 0. 4B. 0. 6C. 0. 5D. 0. 3

答案A

解析[img]/upload/tiku/233/2658722_1.jpg[/img]
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