18.(20 1 1 Yantai, Shandong, 18, 4 points) By finding out the inherent laws contained in this group of graphic symbols, fill in the appropriate graphics on the horizontal lines in the blank space.

answer

Observing the figures, we can find the law: each figure is an axisymmetric figure composed of two English capital letters, arranged in order, in which the odd positions are symmetrical up and down and the even positions are symmetrical left and right.

Methods This question, like the 12 question, is a variant of the typical question and belongs to the law exploration question. It is the key to solve the problem to investigate the ability of law exploration and axisymmetric knowledge.

Error-prone point analysis is wrong because the law cannot be found or the inductive law is not comprehensive.

Keywords explore the symmetry of the law

Difficulty ★★★★★☆

Exploration law of question types