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【简答题】
设A、B、C为保密锁的3个按键,当A键单独按下时,锁既不打开也不报警;只有当设A、B、C同时按下,或者A、B同时按下,或者A、C同时按下时,锁才能被打开;不符合上述组合状态时,将发出报警信号。请设计此保密锁的逻辑电路: 1) 列出真值表; 2) 求出最简逻辑表达式; 3) 画出与非门实现的电路图。
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【单选题】Which group of people can NOT vote in the British general election?
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相关题目：
【单选题】Which of the following is TRUE about the immigration reform?
A.
It was proposed by a group of senators.
B.
Mr Obama had carried out the reform.
C.
Illegal immigrants would soon be given citizenship.
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Skim milk
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member in the House of Commons
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