Which of the following plane figures have reflectional symmetry?
列平面图形具有反射对称性质?
Which of the following plane figures have reflectional symmetry?
列平面图形具有反射对称性质?
with mastering the less reflectional skills , not multi-angle, multi-channel reflection on the issues of education and teaching.
反思技能掌握较少,还不能多视角、多途反思教育教学上的问题。
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