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- 1. 从键盘输入两个命题变元P和Q的真值,求它们的合取、析取、条件和双条件的真值。(A) 2. 求任意一个命题公式的真值表(B,并根据真值表求主范式(C)) -1. From the keyboard input variables of two propositions P and Q of the true value, find their conjunction, disjunction, conditional and biconditional true value. (A)
