A.—个字符的标准ASCII码占一个字节,其最高二进制位总为1
B.所有大写英文字母的ASCII码值都小于小写英文字母的ASCII码值
C.所有大写英文字母的ASCII码值都大于小写英文字母的ASCII码值
D.标准ASCII码表有256个不同的字符编码
计算机一级MS Office全真模拟练习题19
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