题目:单片机复位后,SP、PC、I/O口的内容为()
A. SP = 07H PC = 00H P0 = P1 = P2 = P3 = FFH
B. SP = 00H PC = 0000H P0 = P1 = P2 = P3 = 00H
C. SP = 07H PC = 0000H P0 = P1 = P2 = P3 = FFH
D. SP = 00H PC = 00H P0 = P1 = P2 = P3 = 00H
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