问答题
(∀x)(∃y)H(x,y)其中H(x,y):x>y,个体域为D={4.2},求真值
问答题 (x)p(x)∨(y)Q(y)
问答题 (x)(P(x)Q(x))
问答题 (x)P(x)∨(y)Q(y)