改写后的课文内容填空 （共10个空格，每空1分，满分10分）

Many m    (1) meet and f    (2) a band because they like to write and play their own music. They may start as a group of high school students. Sometimes they may play to passers-by in the street or subway so that they can e    (3) some extra money for themselves or to pay for their i    (4). Later they may give p      (5) in p      (6) or clubs. They hope to make records in a s     (7) and sell millions of copies to become m    (8)! H    (9), there was one band that started in a different way. It was c     (10) the Monkeys and began as a TV show.

某兴趣小组要测定高锰酸钾样品的纯度（假设杂质受热不反应），请根据下列装置填空：

（1）组成D装置的两种主要玻璃仪器的名称是______和______；

（2）高锰酸钾样品在A装置中反应的化学方程式为______；

（3）A装置试管口要略向下倾斜的原因是______；

（4）要完成测定任务，需选用的装置有______（填字母），需测量的数据有______．