题目

A China，Torch（火炬）Passing On The torch for the 29th Olympic Games was lit on March 25,2008．It will arrive in Beijing on August 8 aftertraveling across 135 cities around the world over 130 days． B Reading，Happiness and Knowledge On April 23，2008，World ReadingDay，billions of people opened their books andread．Books brought them into a world ofhappiness and knowledge． C Chang'e Ⅰ Into Space Chang'e Ⅰ，China's first moon satellite，went into space on October 24，2007．It took pictures of themoon and sent them back to the Each． D Plastic（塑料）Bags Limited（明明同学在家用高压锅为妈妈煮饭时，不小心把饭烧焦了，得到了一种黑色残渣．根据这一现象，请你猜想：米饭中含有______元素．请设计一个实验证明这个猜想  实验步骤  能得出结论的实验现象（及化学方程式）  实验结论 ______ ______ ______