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.

相关题目

So many directors ____, the boarding meeting had to be put off. A.  were absent
So many directors ____, the boarding meeting had to be put off. A.  were absent     B. been absent    C. had been absent      D. being absent  
党的群众路线教育实践活动,紧紧围绕保持和发展党的先进
党的群众路线教育实践活动,紧紧围绕保持和发展党的先进性和纯洁性,以为民务实清廉为主要内容。党的群众路线教育实践活动实施以来,一系列从
第九届全国大学生运动会于2012年9月在天津举行。下图是大学
第九届全国大学生运动会于2012年9月在天津举行。下图是大学生运动会吉祥物“快乐阳光——津津”。吉祥物“快乐阳光——津津”取材阳光,象征光明
I was always complaining about wind or rain.    41    it was nothing unu
I was always complaining about wind or rain.    41    it was nothing unusual for the arrival of wind or rain, it caused inconvenience for me to go out, and sometimes it even created an awful
   Soong Mei-ling was one of the most well-known Chinese women of the twentiet
   Soong Mei-ling was one of the most well-known Chinese women of the twentieth century.    Mei-ling was born in Hainan in 1898, the youngest daughter of Charlie Soong. At the age of 8, she was s
Last summer we visited the West Lake, ______Hangzhou is famous in the world. A.
Last summer we visited the West Lake, ______Hangzhou is famous in the world. A. for which      B. for that      C. in which      D. what  
 若的和仍是一个单项式,则+              .
 若的和仍是一个单项式,则+              .
某夫妇妻子色盲,丈夫表现型正常,生下一性染色体组成为XX
某夫妇妻子色盲,丈夫表现型正常,生下一性染色体组成为XXY的色肓孩子,出现这种现象的原因可能是 A.女方减数第一次分裂异常或减数第二次分裂异

最新题目