题目

Blue LightningSally loved cars more than anything else. This spring she thought of building a go-kart to enter for the Go-Go Race. So she asked her dad for help.“Well,” he said. “How about this: you do some research first and then come back to me with a design.”A week later, Sally brought her notes and drawings to Dad. She named her go-kart “Blue Lightning”. Dad looked over her work, thinking. “Well, that’s interesting,” he said. “Have a try. Just build Blue Lightning as you’ve designed.”Over three weekends of hard work, Sally turned her design into a real, working go-k以下是人体细胞内两种重要有机物A、B的元素组成、相互关系及功能示意图，请分析回答： （1）A可以分为A1、A2、A3……其原因是：从a到A的方面分析是由于_______________；从B分析是因为_____________。在人体细胞内，B→C发生的场所主要是______________，C→A发生的场所是_________________。 （2）若从细胞内提取出一种主要含有A和B的物质D，请你设计出一种把D中的A除去的方法：_______________________________________。 （3）肝细胞和胰岛细胞核内都含有相同的B，因为这些细胞都是由同一个受精卵通过________（分裂方式）产生的。