下列不能说明变异在生物学和实践上有重要意义的是（    ）

阅读材料，回答问题

材料一：湖南省人民政府《关于加强农村留守儿童关爱保护工作的实施意见》中指出，公安部门要及时依法查处侵害未成年人权益的违法犯罪行为，对侵害未成年人案件，果断处置。加强校园安全管理和周边环境整治，指导督促中小学校、幼儿园完善人防、物防、技防措施，配合教育部门加强法治安全常识普及和预防校园暴力事件，依法严厉打击侵害未成年人的违法犯罪行为。

材料二：一天，小明遇到外校的高年级学生在西大街溜达，让他“赞助”点钱给他们去网吧，还拿随身携带的水果刀吓唬小明。小明见跑不掉又敌不过，就故意对他们说跟他回家取钱，便三转两转把他们带到了执勤交警面前……

    How would you use a radio or a telephone if you had no electricity or batteries? This 1 bothered (使烦恼) British inventor Trevor Baylis. So in 1996, he 2 a wind-up (装有发条的) radio. It doesn't need any 3 or batteries. You wind it up by hand. It plays for about an hour. Then, you wind it up 4, and it plays for another hour. Today it's made in South Africa.

    Then in 1999, Baylis invented a mobile telephone that is powered by 5.The shoes have a small battery that is powered when you 6. This battery is connected to a mobile phone.

    These two simple inventions can bring 7 communications to all parts of the world. Baylis doesn't have a university degree in engineering. In 8, he left high school before graduating. He just loves 9 things to help people. He never knows when 10 will come to him. The idea for the telephone came to him in a dream.

那_________的光柱又向前移动了,带着一种肃穆的欢悦,向上飞似的拥出了一轮朝日。

起……起……用力，用力，纯焰的圆颅，一探再探地_________了地平线，翻登了云背，临照在天空……

与罗曼·罗兰不同，我看到的是落日，较之日出，落日景象更_________、神圣和具有悲剧感。

现在他_________的颂美的歌声，也已在霞彩变幻中，普彻了四方八隅……