题目内容

指出下列公式的层次，并构造其真值表。(1)(pVq)Λq层次和真值表分别为：(2)qΛ(p→q)→p.层次和真值表分别为：(3)(pΛqΛr)→(pVq)层次和真值表分别为：(4)(pVq)Λ(¬pVr)Λ(qVr)层次和真值表分别为：

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1. The theme of “Loving and Hating New York ” is _____.

A. New York deserves both your love and hate
B. New York is trying desperately to regain her lost prestige and status.
C. New York is no longer looked up to or copied as the undisputed fashion authority
D. New York is a city for every kind of people.

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构造下列公式的真值表，并据此说明哪些是其成真赋值，哪些是其成假赋值。(1)(¬p∧(¬q)Vp(2)r→(p∧q)(3)(p→q)↔(pV¬q)

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2. Why do many Europeans call New York their favorite city? It isdue to its _____.

A. Cosmopolitan complexities
B. European standards
C. Mixture of many foreigners
D. its charged, nervos atmosphere

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用真值表方法判断下列公式的类型。(1)(p∧q)∧¬(pVq)(2)(p→q)↔(¬p↔q)(3)((p→q)∧(q→r))→(p→r)

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