A

Test question analysis: We must develop on the basis of inheritance, we must not abandon history and the past, we must inherit and absorb the essence of history, and comprehensively Absorbing the past is wrong, so dialectical negation is both absorbing and abandoning, overcoming and retaining. The essence of dialectical negation is sublation, ① correct; there is a certain connection between the past, present and future of things, and the connection between things constitutes The changes and development of things are ② correct; ③④ are inconsistent with the meaning of the question. Choose A for this question.