标准的ASCII 码,即美国标准信息交换码(American Standard Code for Information Interchange)由多少位二进制数组成?
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1100.11B =( )D
A. 12.75
B. 13.75
C. 12.625
21.CH = ()B
A. 110001.11
B. 100001.11
C. 10011.101
32.75D = ()B
A. 100000.11
B. 10000.11
C. 10010.11
10111.11B = ()O
A. 27.6
B. 23.75
C. 17.C