下列说法中哪些表示的是时刻 A.物体第三秒下落了1米 B.校运动会1

下列说法中哪些表示的是时刻

A物体第三秒下落了1

B校运动会100 m赛跑的最好成绩是12.8

C某场足球赛开赛了15分钟时甲队攻入一球

D人造地球卫星绕地球运行的最小周期是86 min

答案

 C

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