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recommend--推荐

A. 对
B. 错

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guarantee---保证

A. 对
B. 错

The decimal number 126 and its corresponding hexadecimal system can be expressed as ()

A. 8 F
B. 8 E
C. F E
D. 7 E

The decimal number 89.75 and its corresponding binary can be expressed as ()

A. 10001001.01110101
B. 1001001.10
C. 1011001.11
D. 10011000.11

The hexadecimal number corresponding to the binary number 110010010 can be expressed as ()

A. 192H
B. C90H
C. 1A2H
D. CA0H