二年级下册 第七单元 时、分、秒,北京时间2008年8月8日晚8时08分,北京奥运会在国家体育馆开幕。,12,11,10,9,8,7,6,5,4,3,2,1,时针,分针,秒针,5,10,15,20,25,30,35,40,45,50,55,60,数字,指针,格,大格,小格,12,11,10,9,8,7,6,5,4,3,2,1,时针走1大格是1时,12,11,10,9,8,7,6,5,4,3,2,1,5,10,15,20,25,30,35,40,45,50,55,60,分针走1小格是1分,分针走1大格是5分。,12,11,10,9,8,7,6,5,4,3,2,1,5,10,15,20,25,30,35,40,45,50,55,60,时针走1大格,分针正好走1圈。,1时60分,8:08,9:00,9:30,9:45,