1.判一判(正确的打“√”,错误的打“×”) (1)命题¬p的否定是p.( ) (2)∃x0∈M,p(x0)与∀x∈M,¬p(x)的真假性相反.( ) (3)从特称命题的否定看,是对“量词”和“p(x)”同时否定.( )