题目

Well, we’re in our new house. Let’s get a new pet to get along with, Mrs. Brown said to her husband. That sounds like a pretty good idea. he answered. Do you want to see the ads in the newspaper? Let's go to the animal shelter. Many pets there need homes. Since tomorrow is Saturday, we can both go. she said. Next morning the Browns met Mr. Snow at the animal shelter. We want to be sure that the pets here go to good homes. Mr. Snow said. So I need to ask you some questions. After they talked for a while, the Browns decided to get a small dog. It wouldn't need a big house or a big yard. A sm（4分）将红色的固体A加热，产生一种无色无味的气体B和一种银白色的液体；将淡黄色粉末C点燃放入B中，产生明亮的蓝紫色火焰，生成一种有刺激性气味的气体D。请写出上述有关的反应的化学符号表达式，并注明反应的基本类型：（1） （ ）（2） （ ）