The term is used to describe joints with surface contact, as with a pisurrounded by a hole.
· high pair
· low pair
· surface pair
· rotary pair
出自:佳木斯大学语言治疗学

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块