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
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)
3. The author’s hometown is_____?
A. New Orleans
B. New York
C. San Francisco
D. Seattle
4. The reason that many young people are drawn to New York is _____.
A. self-testing
B. job chances
C. metropolitan entertainment
D. freedom
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