本套全书全面而系统地介绍了中小学生各科知识的难解之谜，集知识性、趣味性、新奇性、疑问性与科普性于一体，深入浅出，生动可读，通俗易懂，目的是使广大中小学生在兴味盎然地领略百科知识难解之谜和科学技术的同时，能够加深思考，启迪智慧，开阔视野，探索创新，并以此激发中小学生的求知欲望和探索精神，激发中小学生学习的兴趣和热爱科学、追求科学的热情，使我们全国的中小学生都能自觉学习、主动探索，真正达到创新素质教育的目的。(This set of unabridged book comprehensively and systematically introduces the puzzle of various branches of knowledge of the primary and middle school students, it combines knowledge, interest, novelty, doubt and science together, and explains the profound in simple terms, vivid and readable, popular and easy to understand. The aim is to make the majority of primary and middle school students able to deepen thinking, enlighten wisdom, widen vision, explore innovation in the meantime of appreciating the puzzle of encyclopedic knowledge and science and technology with genuine interest, thus stimulating their thirst for knowledge and spirit of exploration, as well as their interest in learning and passion for science and pursuit of science, so as to make our national primary and middle school students to consciously learn, actively explore, to achieve the goal of innovative quality education.)