下列事件中,属于必然事件的是【 ▲ 】A.抛掷一枚1元硬币落地后

下列事件中,属于必然事件的是【 ▲ 】
A.抛掷一枚1元硬币落地后,有国徽的一面向上
B.打开电视任选一频道,正在播放新闻联播
C.到一条线段两端点距离相等的点在该线段的垂直平分线上
D.某种彩票的中奖率是10%,则购买该种彩票100张一定中奖

答案

C解析:
A、不一定发生,是随机事件,故选项错误,
B、不一定发生,是随机事件,故选项错误,
C、是必然事件,故正确,
D、不一定发生,是随机事件,故选项错误,
故选C.

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