已知⊙O的直径为10cm,点A为的线段OP的中点,当OP=6cm,点A与⊙O的位置关系是 ____.
—It was terrible! It rained a lot during my stay.
读古诗《夜书所见》,解释句中加横线的词语。
知有儿童挑促织
挑:
促织: