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判斷題

指令A(yù)NL A，7FH與CLR（A）7都能使累加器A的最高位清0。

答案：錯(cuò)誤

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指令A(yù)NL A，#7FH與CLR ACC.7都能使累加器A的最高位清0。

答案：正確

指令XRL A，#F0H能使累加器A的高4位取反，低4位不變。

答案：錯(cuò)誤