下列说法正确的是（　　）

标志着十年内乱的“文化大革命”结束的是（    ）

某粒子的结构示意图为（其中n≠0），请回答下列问题：

（1）n的最大值为　____ 　．

（2）若该粒子带两个单位的负电荷，则其对应的化学符号为　____ 　；

（3）若m﹣n=10，则该粒子对应的常见金属元素有　____ （写元素符号）．

根据短文内容完成句子。

   The programmes Sun Xiaomei hosts might be among the shortest on CCTV. On Screen Next Week is on once a week for 15 minutes, and TV You, He and I comes on for five minutes each time once a week too. “Though these programmes are short, I have many ideas to make them more lively for the audience,” she said.

   Sun was interested in music in her childhood. She played the violin since the age of five until she finished middle school. At first her father wanted her to enter a music school; however, 16-year-old Sun Xiaomei became a student in Beijing Broadcasting College.

   Sun loves her job as a hostess very much. She pays great attention to learning from her comrades(同事), especially Zhao Zhongxiang. When Zhao Zhongxiang hosted The World and The Animal World, Sun would sit beside him to learn.

 “I am sure that when I am seen by hundreds of millions of audience on the weekend, I can make friends with them through my warm and easy talk,” she said.