已知A~I均为初中化学常见的物质,它们相互间的关系如图所示.该图体现了化合物F四种不同的化学性质,其中B溶液呈蓝色,I是无色无味的气体,B、C分别与A反应均有不溶于稀硝酸的同种白色沉淀产生,E与F反应生成另一种不溶于稀硝酸的白色沉淀,C与E反应产生氨味气体.(“﹣”表示两物质间能反应,“→”表示物质间的转化关系.)
阅读短文,回答问题。
I live in a small house. It's a small green house. In the house we have a dinning room,two bedrooms, a living room and a kitchen. We watch TV in the living room. We have our breakfast, lunch and supper in the dining room. We sleep in the bedroom. We wash faces and have baths in the bathroom.
Question :
下图是两条大河示意图,图中小岛因泥沙不断堆积而扩展,可能出现的情况是( )
①A岛将与甲岸相连 ②A岛将与乙岸相连
③B岛将与丙岸相连 ④B岛将与丁岸相连.
下列酒精灯的使用方法正确的是( )