问题
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:.-2,1,31,70,112,()。A.154 B.155 C.256 D.280
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.-2,1,31,70,112,()。A.154 B.155 C.256 D.280
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2, l8, 33, 48, 64, ()。A.82 B.96 C.112 D.136
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1,2,10,38,()A.154 B.128 C.96 D.112
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-2,1,31,70,112,()。A. 154B. 155C. 256D. 280
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主机地址122.34.2.160属于子网()。A.122.34.2.64/26 B.122.34.2.96/26 C.122.34.2.128/26 D.1