单项选择题
A.1023bit B.1025bit C.1045bit D.1075bit
A.256 B.341 C.456 D.525
A.-40℃~+70℃ B.-50℃~+70℃ C.-40℃~+60℃ D.-40℃~+80℃
A.1~255 B.2~255 C.1~256 D.2~256
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