1,3,15,( )A:46;   B:48;   C:255;   D:

admin2022-08-02  2

问题 1,3,15,( )A:46;  B:48;  C:255;  D:256

选项 A:46;
  B:48;
  C:255;
  D:256

答案 C

解析 选C, 21 - 1 = 1, 22 - 1 = 3 ,24 - 1 = 15, 28 - 1 = 255,
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