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【单选题】
若将一个TTL异或门当做反使用,则异或门的A和B输入端应( )A.
B输入端接高电平，A输入端作为反输入端
B.
B输入端接低电平，A输入端作为反输入端
C.
A、B两个输入端并联，作为反的输入端
D.
不能实现
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【单选题】以下是二元一次不等式的是哪一个?