题目

When I was in the four grade, I joined in a piano competition. 【1】I spent four hours practise playing the piano every day. My piano teacher 【2】came three times a week help me. A few weeks later, 【3】I made much progresses. Then the big day finally arrived. 【4】I was so nervous when they called my name. I went up and start to play. 【5】While I was show the music, everyone sat still and listened. 【6】The song was play without any mistakes. 【7】Then I waited for them to call out a winner. When I heard my name, 【8】my heart was beating so quick that I thought I would stop下列实验过程的描述错误的是（　　）A.白磷自燃产生大量五氧化二磷B.木炭在氧气中燃烧发出明亮白光C.镁带在空气中燃烧发出耀眼的白光，生成白色固体D.蜡烛燃烧时的生成物会沿蜡烛柱体流下来