题目

I really wanted to help those homeless children in the flooded areas, ______ I donated all the pocket money that I had saved for months.A．soB．becauseC．sinceD．for 答案：A解析:略关于下列粒子结构示意图的说法正确的是（　　） A、它们原子的核外电子数相同B、它们都具有稳定结构C、它们都显电性D、它们属于同种元素