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   Some cats are black. Some cats are white. Some cats are black and white. But no cats are green. I have a mother cat. She has three sons and two daughters. The mother cat loves her sons and daughters and they love their mother very much. And she looks after them.

根据下列提示写出相对应的内容。
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（2）我国初步建立起社会主义基本制度的标志____ 
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（4）探索社会主义道路时期，被誉为“党的好干部”的人物____ 
（5）土地改革时所依据的法律文献____ 
（6）列举两项“一五”计划时在工业方面取得的成就____